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Diffstat (limited to 'plugins/Skins/libs/v8.h')
| -rw-r--r-- | plugins/Skins/libs/v8.h | 3686 |
1 files changed, 0 insertions, 3686 deletions
diff --git a/plugins/Skins/libs/v8.h b/plugins/Skins/libs/v8.h deleted file mode 100644 index 9c9edf7292..0000000000 --- a/plugins/Skins/libs/v8.h +++ /dev/null @@ -1,3686 +0,0 @@ -// Copyright 2007-2009 the V8 project authors. All rights reserved.
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-// * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-// * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following
-// disclaimer in the documentation and/or other materials provided
-// with the distribution.
-// * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived
-// from this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-/** \mainpage V8 API Reference Guide
- *
- * V8 is Google's open source JavaScript engine.
- *
- * This set of documents provides reference material generated from the
- * V8 header file, include/v8.h.
- *
- * For other documentation see http://code.google.com/apis/v8/
- */
-
-#ifndef V8_H_
-#define V8_H_
-
-#include <stdio.h>
-
-#ifdef _WIN32
-// When compiling on MinGW stdint.h is available.
-#ifdef __MINGW32__
-#include <stdint.h>
-#else // __MINGW32__
-typedef signed char int8_t;
-typedef unsigned char uint8_t;
-typedef short int16_t; // NOLINT
-typedef unsigned short uint16_t; // NOLINT
-typedef int int32_t;
-typedef unsigned int uint32_t;
-typedef __int64 int64_t;
-typedef unsigned __int64 uint64_t;
-// intptr_t and friends are defined in crtdefs.h through stdio.h.
-#endif // __MINGW32__
-
-// Setup for Windows DLL export/import. When building the V8 DLL the
-// BUILDING_V8_SHARED needs to be defined. When building a program which uses
-// the V8 DLL USING_V8_SHARED needs to be defined. When either building the V8
-// static library or building a program which uses the V8 static library neither
-// BUILDING_V8_SHARED nor USING_V8_SHARED should be defined.
-#if defined(BUILDING_V8_SHARED) && defined(USING_V8_SHARED)
-#error both BUILDING_V8_SHARED and USING_V8_SHARED are set - please check the\
- build configuration to ensure that at most one of these is set
-#endif
-
-#ifdef BUILDING_V8_SHARED
-#define V8EXPORT __declspec(dllexport)
-#elif USING_V8_SHARED
-#define V8EXPORT __declspec(dllimport)
-#else
-#define V8EXPORT
-#endif // BUILDING_V8_SHARED
-
-#else // _WIN32
-
-#include <stdint.h>
-
-// Setup for Linux shared library export. There is no need to distinguish
-// between building or using the V8 shared library, but we should not
-// export symbols when we are building a static library.
-#if defined(__GNUC__) && (__GNUC__ >= 4) && defined(V8_SHARED)
-#define V8EXPORT __attribute__ ((visibility("default")))
-#else // defined(__GNUC__) && (__GNUC__ >= 4)
-#define V8EXPORT
-#endif // defined(__GNUC__) && (__GNUC__ >= 4)
-
-#endif // _WIN32
-
-/**
- * The v8 JavaScript engine.
- */
-namespace v8 {
-
-class Context;
-class String;
-class Value;
-class Utils;
-class Number;
-class Object;
-class Array;
-class Int32;
-class Uint32;
-class External;
-class Primitive;
-class Boolean;
-class Integer;
-class Function;
-class Date;
-class ImplementationUtilities;
-class Signature;
-template <class T> class Handle;
-template <class T> class Local;
-template <class T> class Persistent;
-class FunctionTemplate;
-class ObjectTemplate;
-class Data;
-class AccessorInfo;
-class StackTrace;
-class StackFrame;
-
-namespace internal {
-
-class Arguments;
-class Object;
-class Heap;
-class Top;
-
-}
-
-
-// --- W e a k H a n d l e s
-
-
-/**
- * A weak reference callback function.
- *
- * This callback should either explicitly invoke Dispose on |object| if
- * V8 wrapper is not needed anymore, or 'revive' it by invocation of MakeWeak.
- *
- * \param object the weak global object to be reclaimed by the garbage collector
- * \param parameter the value passed in when making the weak global object
- */
-typedef void (*WeakReferenceCallback)(Persistent<Value> object,
- void* parameter);
-
-
-// --- H a n d l e s ---
-
-#define TYPE_CHECK(T, S) \
- while (false) { \
- *(static_cast<T* volatile*>(0)) = static_cast<S*>(0); \
- }
-
-/**
- * An object reference managed by the v8 garbage collector.
- *
- * All objects returned from v8 have to be tracked by the garbage
- * collector so that it knows that the objects are still alive. Also,
- * because the garbage collector may move objects, it is unsafe to
- * point directly to an object. Instead, all objects are stored in
- * handles which are known by the garbage collector and updated
- * whenever an object moves. Handles should always be passed by value
- * (except in cases like out-parameters) and they should never be
- * allocated on the heap.
- *
- * There are two types of handles: local and persistent handles.
- * Local handles are light-weight and transient and typically used in
- * local operations. They are managed by HandleScopes. Persistent
- * handles can be used when storing objects across several independent
- * operations and have to be explicitly deallocated when they're no
- * longer used.
- *
- * It is safe to extract the object stored in the handle by
- * dereferencing the handle (for instance, to extract the Object* from
- * an Handle<Object>); the value will still be governed by a handle
- * behind the scenes and the same rules apply to these values as to
- * their handles.
- */
-template <class T> class Handle {
- public:
-
- /**
- * Creates an empty handle.
- */
- inline Handle();
-
- /**
- * Creates a new handle for the specified value.
- */
- inline explicit Handle(T* val) : val_(val) { }
-
- /**
- * Creates a handle for the contents of the specified handle. This
- * constructor allows you to pass handles as arguments by value and
- * to assign between handles. However, if you try to assign between
- * incompatible handles, for instance from a Handle<String> to a
- * Handle<Number> it will cause a compiletime error. Assigning
- * between compatible handles, for instance assigning a
- * Handle<String> to a variable declared as Handle<Value>, is legal
- * because String is a subclass of Value.
- */
- template <class S> inline Handle(Handle<S> that)
- : val_(reinterpret_cast<T*>(*that)) {
- /**
- * This check fails when trying to convert between incompatible
- * handles. For example, converting from a Handle<String> to a
- * Handle<Number>.
- */
- TYPE_CHECK(T, S);
- }
-
- /**
- * Returns true if the handle is empty.
- */
- inline bool IsEmpty() const { return val_ == 0; }
-
- inline T* operator->() const { return val_; }
-
- inline T* operator*() const { return val_; }
-
- /**
- * Sets the handle to be empty. IsEmpty() will then return true.
- */
- inline void Clear() { this->val_ = 0; }
-
- /**
- * Checks whether two handles are the same.
- * Returns true if both are empty, or if the objects
- * to which they refer are identical.
- * The handles' references are not checked.
- */
- template <class S> inline bool operator==(Handle<S> that) const {
- internal::Object** a = reinterpret_cast<internal::Object**>(**this);
- internal::Object** b = reinterpret_cast<internal::Object**>(*that);
- if (a == 0) return b == 0;
- if (b == 0) return false;
- return *a == *b;
- }
-
- /**
- * Checks whether two handles are different.
- * Returns true if only one of the handles is empty, or if
- * the objects to which they refer are different.
- * The handles' references are not checked.
- */
- template <class S> inline bool operator!=(Handle<S> that) const {
- return !operator==(that);
- }
-
- template <class S> static inline Handle<T> Cast(Handle<S> that) {
-#ifdef V8_ENABLE_CHECKS
- // If we're going to perform the type check then we have to check
- // that the handle isn't empty before doing the checked cast.
- if (that.IsEmpty()) return Handle<T>();
-#endif
- return Handle<T>(T::Cast(*that));
- }
-
- template <class S> inline Handle<S> As() {
- return Handle<S>::Cast(*this);
- }
-
- private:
- T* val_;
-};
-
-
-/**
- * A light-weight stack-allocated object handle. All operations
- * that return objects from within v8 return them in local handles. They
- * are created within HandleScopes, and all local handles allocated within a
- * handle scope are destroyed when the handle scope is destroyed. Hence it
- * is not necessary to explicitly deallocate local handles.
- */
-template <class T> class Local : public Handle<T> {
- public:
- inline Local();
- template <class S> inline Local(Local<S> that)
- : Handle<T>(reinterpret_cast<T*>(*that)) {
- /**
- * This check fails when trying to convert between incompatible
- * handles. For example, converting from a Handle<String> to a
- * Handle<Number>.
- */
- TYPE_CHECK(T, S);
- }
- template <class S> inline Local(S* that) : Handle<T>(that) { }
- template <class S> static inline Local<T> Cast(Local<S> that) {
-#ifdef V8_ENABLE_CHECKS
- // If we're going to perform the type check then we have to check
- // that the handle isn't empty before doing the checked cast.
- if (that.IsEmpty()) return Local<T>();
-#endif
- return Local<T>(T::Cast(*that));
- }
-
- template <class S> inline Local<S> As() {
- return Local<S>::Cast(*this);
- }
-
- /** Create a local handle for the content of another handle.
- * The referee is kept alive by the local handle even when
- * the original handle is destroyed/disposed.
- */
- inline static Local<T> New(Handle<T> that);
-};
-
-
-/**
- * An object reference that is independent of any handle scope. Where
- * a Local handle only lives as long as the HandleScope in which it was
- * allocated, a Persistent handle remains valid until it is explicitly
- * disposed.
- *
- * A persistent handle contains a reference to a storage cell within
- * the v8 engine which holds an object value and which is updated by
- * the garbage collector whenever the object is moved. A new storage
- * cell can be created using Persistent::New and existing handles can
- * be disposed using Persistent::Dispose. Since persistent handles
- * are passed by value you may have many persistent handle objects
- * that point to the same storage cell. For instance, if you pass a
- * persistent handle as an argument to a function you will not get two
- * different storage cells but rather two references to the same
- * storage cell.
- */
-template <class T> class Persistent : public Handle<T> {
- public:
-
- /**
- * Creates an empty persistent handle that doesn't point to any
- * storage cell.
- */
- inline Persistent();
-
- /**
- * Creates a persistent handle for the same storage cell as the
- * specified handle. This constructor allows you to pass persistent
- * handles as arguments by value and to assign between persistent
- * handles. However, attempting to assign between incompatible
- * persistent handles, for instance from a Persistent<String> to a
- * Persistent<Number> will cause a compiletime error. Assigning
- * between compatible persistent handles, for instance assigning a
- * Persistent<String> to a variable declared as Persistent<Value>,
- * is allowed as String is a subclass of Value.
- */
- template <class S> inline Persistent(Persistent<S> that)
- : Handle<T>(reinterpret_cast<T*>(*that)) {
- /**
- * This check fails when trying to convert between incompatible
- * handles. For example, converting from a Handle<String> to a
- * Handle<Number>.
- */
- TYPE_CHECK(T, S);
- }
-
- template <class S> inline Persistent(S* that) : Handle<T>(that) { }
-
- /**
- * "Casts" a plain handle which is known to be a persistent handle
- * to a persistent handle.
- */
- template <class S> explicit inline Persistent(Handle<S> that)
- : Handle<T>(*that) { }
-
- template <class S> static inline Persistent<T> Cast(Persistent<S> that) {
-#ifdef V8_ENABLE_CHECKS
- // If we're going to perform the type check then we have to check
- // that the handle isn't empty before doing the checked cast.
- if (that.IsEmpty()) return Persistent<T>();
-#endif
- return Persistent<T>(T::Cast(*that));
- }
-
- template <class S> inline Persistent<S> As() {
- return Persistent<S>::Cast(*this);
- }
-
- /**
- * Creates a new persistent handle for an existing local or
- * persistent handle.
- */
- inline static Persistent<T> New(Handle<T> that);
-
- /**
- * Releases the storage cell referenced by this persistent handle.
- * Does not remove the reference to the cell from any handles.
- * This handle's reference, and any any other references to the storage
- * cell remain and IsEmpty will still return false.
- */
- inline void Dispose();
-
- /**
- * Make the reference to this object weak. When only weak handles
- * refer to the object, the garbage collector will perform a
- * callback to the given V8::WeakReferenceCallback function, passing
- * it the object reference and the given parameters.
- */
- inline void MakeWeak(void* parameters, WeakReferenceCallback callback);
-
- /** Clears the weak reference to this object.*/
- inline void ClearWeak();
-
- /**
- *Checks if the handle holds the only reference to an object.
- */
- inline bool IsNearDeath() const;
-
- /**
- * Returns true if the handle's reference is weak.
- */
- inline bool IsWeak() const;
-
- private:
- friend class ImplementationUtilities;
- friend class ObjectTemplate;
-};
-
-
- /**
- * A stack-allocated class that governs a number of local handles.
- * After a handle scope has been created, all local handles will be
- * allocated within that handle scope until either the handle scope is
- * deleted or another handle scope is created. If there is already a
- * handle scope and a new one is created, all allocations will take
- * place in the new handle scope until it is deleted. After that,
- * new handles will again be allocated in the original handle scope.
- *
- * After the handle scope of a local handle has been deleted the
- * garbage collector will no longer track the object stored in the
- * handle and may deallocate it. The behavior of accessing a handle
- * for which the handle scope has been deleted is undefined.
- */
-class V8EXPORT HandleScope {
- public:
- HandleScope();
-
- ~HandleScope();
-
- /**
- * Closes the handle scope and returns the value as a handle in the
- * previous scope, which is the new current scope after the call.
- */
- template <class T> Local<T> Close(Handle<T> value);
-
- /**
- * Counts the number of allocated handles.
- */
- static int NumberOfHandles();
-
- /**
- * Creates a new handle with the given value.
- */
- static internal::Object** CreateHandle(internal::Object* value);
-
- private:
- // Make it impossible to create heap-allocated or illegal handle
- // scopes by disallowing certain operations.
- HandleScope(const HandleScope&);
- void operator=(const HandleScope&);
- void* operator new(size_t size);
- void operator delete(void*, size_t);
-
- // This Data class is accessible internally as HandleScopeData through a
- // typedef in the ImplementationUtilities class.
- class V8EXPORT Data {
- public:
- int extensions;
- internal::Object** next;
- internal::Object** limit;
- inline void Initialize() {
- extensions = -1;
- next = limit = NULL;
- }
- };
-
- Data previous_;
-
- // Allow for the active closing of HandleScopes which allows to pass a handle
- // from the HandleScope being closed to the next top most HandleScope.
- bool is_closed_;
- internal::Object** RawClose(internal::Object** value);
-
- friend class ImplementationUtilities;
-};
-
-
-// --- S p e c i a l o b j e c t s ---
-
-
-/**
- * The superclass of values and API object templates.
- */
-class V8EXPORT Data {
- private:
- Data();
-};
-
-
-/**
- * Pre-compilation data that can be associated with a script. This
- * data can be calculated for a script in advance of actually
- * compiling it, and can be stored between compilations. When script
- * data is given to the compile method compilation will be faster.
- */
-class V8EXPORT ScriptData { // NOLINT
- public:
- virtual ~ScriptData() { }
-
- /**
- * Pre-compiles the specified script (context-independent).
- *
- * \param input Pointer to UTF-8 script source code.
- * \param length Length of UTF-8 script source code.
- */
- static ScriptData* PreCompile(const char* input, int length);
-
- /**
- * Pre-compiles the specified script (context-independent).
- *
- * NOTE: Pre-compilation using this method cannot happen on another thread
- * without using Lockers.
- *
- * \param source Script source code.
- */
- static ScriptData* PreCompile(Handle<String> source);
-
- /**
- * Load previous pre-compilation data.
- *
- * \param data Pointer to data returned by a call to Data() of a previous
- * ScriptData. Ownership is not transferred.
- * \param length Length of data.
- */
- static ScriptData* New(const char* data, int length);
-
- /**
- * Returns the length of Data().
- */
- virtual int Length() = 0;
-
- /**
- * Returns a serialized representation of this ScriptData that can later be
- * passed to New(). NOTE: Serialized data is platform-dependent.
- */
- virtual const char* Data() = 0;
-
- /**
- * Returns true if the source code could not be parsed.
- */
- virtual bool HasError() = 0;
-};
-
-
-/**
- * The origin, within a file, of a script.
- */
-class ScriptOrigin {
- public:
- inline ScriptOrigin(
- Handle<Value> resource_name,
- Handle<Integer> resource_line_offset = Handle<Integer>(),
- Handle<Integer> resource_column_offset = Handle<Integer>())
- : resource_name_(resource_name),
- resource_line_offset_(resource_line_offset),
- resource_column_offset_(resource_column_offset) { }
- inline Handle<Value> ResourceName() const;
- inline Handle<Integer> ResourceLineOffset() const;
- inline Handle<Integer> ResourceColumnOffset() const;
- private:
- Handle<Value> resource_name_;
- Handle<Integer> resource_line_offset_;
- Handle<Integer> resource_column_offset_;
-};
-
-
-/**
- * A compiled JavaScript script.
- */
-class V8EXPORT Script {
- public:
-
- /**
- * Compiles the specified script (context-independent).
- *
- * \param source Script source code.
- * \param origin Script origin, owned by caller, no references are kept
- * when New() returns
- * \param pre_data Pre-parsing data, as obtained by ScriptData::PreCompile()
- * using pre_data speeds compilation if it's done multiple times.
- * Owned by caller, no references are kept when New() returns.
- * \param script_data Arbitrary data associated with script. Using
- * this has same effect as calling SetData(), but allows data to be
- * available to compile event handlers.
- * \return Compiled script object (context independent; when run it
- * will use the currently entered context).
- */
- static Local<Script> New(Handle<String> source,
- ScriptOrigin* origin = NULL,
- ScriptData* pre_data = NULL,
- Handle<String> script_data = Handle<String>());
-
- /**
- * Compiles the specified script using the specified file name
- * object (typically a string) as the script's origin.
- *
- * \param source Script source code.
- * \param file_name file name object (typically a string) to be used
- * as the script's origin.
- * \return Compiled script object (context independent; when run it
- * will use the currently entered context).
- */
- static Local<Script> New(Handle<String> source,
- Handle<Value> file_name);
-
- /**
- * Compiles the specified script (bound to current context).
- *
- * \param source Script source code.
- * \param origin Script origin, owned by caller, no references are kept
- * when Compile() returns
- * \param pre_data Pre-parsing data, as obtained by ScriptData::PreCompile()
- * using pre_data speeds compilation if it's done multiple times.
- * Owned by caller, no references are kept when Compile() returns.
- * \param script_data Arbitrary data associated with script. Using
- * this has same effect as calling SetData(), but makes data available
- * earlier (i.e. to compile event handlers).
- * \return Compiled script object, bound to the context that was active
- * when this function was called. When run it will always use this
- * context.
- */
- static Local<Script> Compile(Handle<String> source,
- ScriptOrigin* origin = NULL,
- ScriptData* pre_data = NULL,
- Handle<String> script_data = Handle<String>());
-
- /**
- * Compiles the specified script using the specified file name
- * object (typically a string) as the script's origin.
- *
- * \param source Script source code.
- * \param file_name File name to use as script's origin
- * \param script_data Arbitrary data associated with script. Using
- * this has same effect as calling SetData(), but makes data available
- * earlier (i.e. to compile event handlers).
- * \return Compiled script object, bound to the context that was active
- * when this function was called. When run it will always use this
- * context.
- */
- static Local<Script> Compile(Handle<String> source,
- Handle<Value> file_name,
- Handle<String> script_data = Handle<String>());
-
- /**
- * Runs the script returning the resulting value. If the script is
- * context independent (created using ::New) it will be run in the
- * currently entered context. If it is context specific (created
- * using ::Compile) it will be run in the context in which it was
- * compiled.
- */
- Local<Value> Run();
-
- /**
- * Returns the script id value.
- */
- Local<Value> Id();
-
- /**
- * Associate an additional data object with the script. This is mainly used
- * with the debugger as this data object is only available through the
- * debugger API.
- */
- void SetData(Handle<String> data);
-};
-
-
-/**
- * An error message.
- */
-class V8EXPORT Message {
- public:
- Local<String> Get() const;
- Local<String> GetSourceLine() const;
-
- /**
- * Returns the resource name for the script from where the function causing
- * the error originates.
- */
- Handle<Value> GetScriptResourceName() const;
-
- /**
- * Returns the resource data for the script from where the function causing
- * the error originates.
- */
- Handle<Value> GetScriptData() const;
-
- /**
- * Exception stack trace. By default stack traces are not captured for
- * uncaught exceptions. SetCaptureStackTraceForUncaughtExceptions allows
- * to change this option.
- */
- Handle<StackTrace> GetStackTrace() const;
-
- /**
- * Returns the number, 1-based, of the line where the error occurred.
- */
- int GetLineNumber() const;
-
- /**
- * Returns the index within the script of the first character where
- * the error occurred.
- */
- int GetStartPosition() const;
-
- /**
- * Returns the index within the script of the last character where
- * the error occurred.
- */
- int GetEndPosition() const;
-
- /**
- * Returns the index within the line of the first character where
- * the error occurred.
- */
- int GetStartColumn() const;
-
- /**
- * Returns the index within the line of the last character where
- * the error occurred.
- */
- int GetEndColumn() const;
-
- // TODO(1245381): Print to a string instead of on a FILE.
- static void PrintCurrentStackTrace(FILE* out);
-
- static const int kNoLineNumberInfo = 0;
- static const int kNoColumnInfo = 0;
-};
-
-
-/**
- * Representation of a JavaScript stack trace. The information collected is a
- * snapshot of the execution stack and the information remains valid after
- * execution continues.
- */
-class V8EXPORT StackTrace {
- public:
- /**
- * Flags that determine what information is placed captured for each
- * StackFrame when grabbing the current stack trace.
- */
- enum StackTraceOptions {
- kLineNumber = 1,
- kColumnOffset = 1 << 1 | kLineNumber,
- kScriptName = 1 << 2,
- kFunctionName = 1 << 3,
- kIsEval = 1 << 4,
- kIsConstructor = 1 << 5,
- kOverview = kLineNumber | kColumnOffset | kScriptName | kFunctionName,
- kDetailed = kOverview | kIsEval | kIsConstructor
- };
-
- /**
- * Returns a StackFrame at a particular index.
- */
- Local<StackFrame> GetFrame(uint32_t index) const;
-
- /**
- * Returns the number of StackFrames.
- */
- int GetFrameCount() const;
-
- /**
- * Returns StackTrace as a v8::Array that contains StackFrame objects.
- */
- Local<Array> AsArray();
-
- /**
- * Grab a snapshot of the the current JavaScript execution stack.
- *
- * \param frame_limit The maximum number of stack frames we want to capture.
- * \param options Enumerates the set of things we will capture for each
- * StackFrame.
- */
- static Local<StackTrace> CurrentStackTrace(
- int frame_limit,
- StackTraceOptions options = kOverview);
-};
-
-
-/**
- * A single JavaScript stack frame.
- */
-class V8EXPORT StackFrame {
- public:
- /**
- * Returns the number, 1-based, of the line for the associate function call.
- * This method will return Message::kNoLineNumberInfo if it is unable to
- * retrieve the line number, or if kLineNumber was not passed as an option
- * when capturing the StackTrace.
- */
- int GetLineNumber() const;
-
- /**
- * Returns the 1-based column offset on the line for the associated function
- * call.
- * This method will return Message::kNoColumnInfo if it is unable to retrieve
- * the column number, or if kColumnOffset was not passed as an option when
- * capturing the StackTrace.
- */
- int GetColumn() const;
-
- /**
- * Returns the name of the resource that contains the script for the
- * function for this StackFrame.
- */
- Local<String> GetScriptName() const;
-
- /**
- * Returns the name of the function associated with this stack frame.
- */
- Local<String> GetFunctionName() const;
-
- /**
- * Returns whether or not the associated function is compiled via a call to
- * eval().
- */
- bool IsEval() const;
-
- /**
- * Returns whther or not the associated function is called as a
- * constructor via "new".
- */
- bool IsConstructor() const;
-};
-
-
-// --- V a l u e ---
-
-
-/**
- * The superclass of all JavaScript values and objects.
- */
-class Value : public Data {
- public:
-
- /**
- * Returns true if this value is the undefined value. See ECMA-262
- * 4.3.10.
- */
- V8EXPORT bool IsUndefined() const;
-
- /**
- * Returns true if this value is the null value. See ECMA-262
- * 4.3.11.
- */
- V8EXPORT bool IsNull() const;
-
- /**
- * Returns true if this value is true.
- */
- V8EXPORT bool IsTrue() const;
-
- /**
- * Returns true if this value is false.
- */
- V8EXPORT bool IsFalse() const;
-
- /**
- * Returns true if this value is an instance of the String type.
- * See ECMA-262 8.4.
- */
- inline bool IsString() const;
-
- /**
- * Returns true if this value is a function.
- */
- V8EXPORT bool IsFunction() const;
-
- /**
- * Returns true if this value is an array.
- */
- V8EXPORT bool IsArray() const;
-
- /**
- * Returns true if this value is an object.
- */
- V8EXPORT bool IsObject() const;
-
- /**
- * Returns true if this value is boolean.
- */
- V8EXPORT bool IsBoolean() const;
-
- /**
- * Returns true if this value is a number.
- */
- V8EXPORT bool IsNumber() const;
-
- /**
- * Returns true if this value is external.
- */
- V8EXPORT bool IsExternal() const;
-
- /**
- * Returns true if this value is a 32-bit signed integer.
- */
- V8EXPORT bool IsInt32() const;
-
- /**
- * Returns true if this value is a 32-bit unsigned integer.
- */
- V8EXPORT bool IsUint32() const;
-
- /**
- * Returns true if this value is a Date.
- */
- V8EXPORT bool IsDate() const;
-
- /**
- * Returns true if this value is a RegExp.
- */
- V8EXPORT bool IsRegExp() const;
-
- V8EXPORT Local<Boolean> ToBoolean() const;
- V8EXPORT Local<Number> ToNumber() const;
- V8EXPORT Local<String> ToString() const;
- V8EXPORT Local<String> ToDetailString() const;
- V8EXPORT Local<Object> ToObject() const;
- V8EXPORT Local<Integer> ToInteger() const;
- V8EXPORT Local<Uint32> ToUint32() const;
- V8EXPORT Local<Int32> ToInt32() const;
-
- /**
- * Attempts to convert a string to an array index.
- * Returns an empty handle if the conversion fails.
- */
- V8EXPORT Local<Uint32> ToArrayIndex() const;
-
- V8EXPORT bool BooleanValue() const;
- V8EXPORT double NumberValue() const;
- V8EXPORT int64_t IntegerValue() const;
- V8EXPORT uint32_t Uint32Value() const;
- V8EXPORT int32_t Int32Value() const;
-
- /** JS == */
- V8EXPORT bool Equals(Handle<Value> that) const;
- V8EXPORT bool StrictEquals(Handle<Value> that) const;
-
- private:
- inline bool QuickIsString() const;
- V8EXPORT bool FullIsString() const;
-};
-
-
-/**
- * The superclass of primitive values. See ECMA-262 4.3.2.
- */
-class Primitive : public Value { };
-
-
-/**
- * A primitive boolean value (ECMA-262, 4.3.14). Either the true
- * or false value.
- */
-class Boolean : public Primitive {
- public:
- V8EXPORT bool Value() const;
- static inline Handle<Boolean> New(bool value);
-};
-
-
-/**
- * A JavaScript string value (ECMA-262, 4.3.17).
- */
-class String : public Primitive {
- public:
-
- /**
- * Returns the number of characters in this string.
- */
- V8EXPORT int Length() const;
-
- /**
- * Returns the number of bytes in the UTF-8 encoded
- * representation of this string.
- */
- V8EXPORT int Utf8Length() const;
-
- /**
- * Write the contents of the string to an external buffer.
- * If no arguments are given, expects the buffer to be large
- * enough to hold the entire string and NULL terminator. Copies
- * the contents of the string and the NULL terminator into the
- * buffer.
- *
- * Copies up to length characters into the output buffer.
- * Only null-terminates if there is enough space in the buffer.
- *
- * \param buffer The buffer into which the string will be copied.
- * \param start The starting position within the string at which
- * copying begins.
- * \param length The number of bytes to copy from the string.
- * \param nchars_ref The number of characters written, can be NULL.
- * \param hints Various hints that might affect performance of this or
- * subsequent operations.
- * \return The number of bytes copied to the buffer
- * excluding the NULL terminator.
- */
- enum WriteHints {
- NO_HINTS = 0,
- HINT_MANY_WRITES_EXPECTED = 1
- };
-
- V8EXPORT int Write(uint16_t* buffer,
- int start = 0,
- int length = -1,
- WriteHints hints = NO_HINTS) const; // UTF-16
- V8EXPORT int WriteAscii(char* buffer,
- int start = 0,
- int length = -1,
- WriteHints hints = NO_HINTS) const; // ASCII
- V8EXPORT int WriteUtf8(char* buffer,
- int length = -1,
- int* nchars_ref = NULL,
- WriteHints hints = NO_HINTS) const; // UTF-8
-
- /**
- * A zero length string.
- */
- V8EXPORT static v8::Local<v8::String> Empty();
-
- /**
- * Returns true if the string is external
- */
- V8EXPORT bool IsExternal() const;
-
- /**
- * Returns true if the string is both external and ascii
- */
- V8EXPORT bool IsExternalAscii() const;
-
- class V8EXPORT ExternalStringResourceBase {
- public:
- virtual ~ExternalStringResourceBase() {}
-
- protected:
- ExternalStringResourceBase() {}
-
- /**
- * Internally V8 will call this Dispose method when the external string
- * resource is no longer needed. The default implementation will use the
- * delete operator. This method can be overridden in subclasses to
- * control how allocated external string resources are disposed.
- */
- virtual void Dispose() { delete this; }
-
- private:
- // Disallow copying and assigning.
- ExternalStringResourceBase(const ExternalStringResourceBase&);
- void operator=(const ExternalStringResourceBase&);
-
- friend class v8::internal::Heap;
- };
-
- /**
- * An ExternalStringResource is a wrapper around a two-byte string
- * buffer that resides outside V8's heap. Implement an
- * ExternalStringResource to manage the life cycle of the underlying
- * buffer. Note that the string data must be immutable.
- */
- class V8EXPORT ExternalStringResource
- : public ExternalStringResourceBase {
- public:
- /**
- * Override the destructor to manage the life cycle of the underlying
- * buffer.
- */
- virtual ~ExternalStringResource() {}
-
- /**
- * The string data from the underlying buffer.
- */
- virtual const uint16_t* data() const = 0;
-
- /**
- * The length of the string. That is, the number of two-byte characters.
- */
- virtual size_t length() const = 0;
-
- protected:
- ExternalStringResource() {}
- };
-
- /**
- * An ExternalAsciiStringResource is a wrapper around an ascii
- * string buffer that resides outside V8's heap. Implement an
- * ExternalAsciiStringResource to manage the life cycle of the
- * underlying buffer. Note that the string data must be immutable
- * and that the data must be strict 7-bit ASCII, not Latin1 or
- * UTF-8, which would require special treatment internally in the
- * engine and, in the case of UTF-8, do not allow efficient indexing.
- * Use String::New or convert to 16 bit data for non-ASCII.
- */
-
- class V8EXPORT ExternalAsciiStringResource
- : public ExternalStringResourceBase {
- public:
- /**
- * Override the destructor to manage the life cycle of the underlying
- * buffer.
- */
- virtual ~ExternalAsciiStringResource() {}
- /** The string data from the underlying buffer.*/
- virtual const char* data() const = 0;
- /** The number of ascii characters in the string.*/
- virtual size_t length() const = 0;
- protected:
- ExternalAsciiStringResource() {}
- };
-
- /**
- * Get the ExternalStringResource for an external string. Returns
- * NULL if IsExternal() doesn't return true.
- */
- inline ExternalStringResource* GetExternalStringResource() const;
-
- /**
- * Get the ExternalAsciiStringResource for an external ascii string.
- * Returns NULL if IsExternalAscii() doesn't return true.
- */
- V8EXPORT ExternalAsciiStringResource* GetExternalAsciiStringResource() const;
-
- static inline String* Cast(v8::Value* obj);
-
- /**
- * Allocates a new string from either utf-8 encoded or ascii data.
- * The second parameter 'length' gives the buffer length.
- * If the data is utf-8 encoded, the caller must
- * be careful to supply the length parameter.
- * If it is not given, the function calls
- * 'strlen' to determine the buffer length, it might be
- * wrong if 'data' contains a null character.
- */
- V8EXPORT static Local<String> New(const char* data, int length = -1);
-
- /** Allocates a new string from utf16 data.*/
- V8EXPORT static Local<String> New(const uint16_t* data, int length = -1);
-
- /** Creates a symbol. Returns one if it exists already.*/
- V8EXPORT static Local<String> NewSymbol(const char* data, int length = -1);
-
- /**
- * Creates a new string by concatenating the left and the right strings
- * passed in as parameters.
- */
- V8EXPORT static Local<String> Concat(Handle<String> left,
- Handle<String>right);
-
- /**
- * Creates a new external string using the data defined in the given
- * resource. When the external string is no longer live on V8's heap the
- * resource will be disposed by calling its Dispose method. The caller of
- * this function should not otherwise delete or modify the resource. Neither
- * should the underlying buffer be deallocated or modified except through the
- * destructor of the external string resource.
- */
- V8EXPORT static Local<String> NewExternal(ExternalStringResource* resource);
-
- /**
- * Associate an external string resource with this string by transforming it
- * in place so that existing references to this string in the JavaScript heap
- * will use the external string resource. The external string resource's
- * character contents needs to be equivalent to this string.
- * Returns true if the string has been changed to be an external string.
- * The string is not modified if the operation fails. See NewExternal for
- * information on the lifetime of the resource.
- */
- V8EXPORT bool MakeExternal(ExternalStringResource* resource);
-
- /**
- * Creates a new external string using the ascii data defined in the given
- * resource. When the external string is no longer live on V8's heap the
- * resource will be disposed by calling its Dispose method. The caller of
- * this function should not otherwise delete or modify the resource. Neither
- * should the underlying buffer be deallocated or modified except through the
- * destructor of the external string resource.
- */
- V8EXPORT static Local<String> NewExternal(
- ExternalAsciiStringResource* resource);
-
- /**
- * Associate an external string resource with this string by transforming it
- * in place so that existing references to this string in the JavaScript heap
- * will use the external string resource. The external string resource's
- * character contents needs to be equivalent to this string.
- * Returns true if the string has been changed to be an external string.
- * The string is not modified if the operation fails. See NewExternal for
- * information on the lifetime of the resource.
- */
- V8EXPORT bool MakeExternal(ExternalAsciiStringResource* resource);
-
- /**
- * Returns true if this string can be made external.
- */
- V8EXPORT bool CanMakeExternal();
-
- /** Creates an undetectable string from the supplied ascii or utf-8 data.*/
- V8EXPORT static Local<String> NewUndetectable(const char* data,
- int length = -1);
-
- /** Creates an undetectable string from the supplied utf-16 data.*/
- V8EXPORT static Local<String> NewUndetectable(const uint16_t* data,
- int length = -1);
-
- /**
- * Converts an object to a utf8-encoded character array. Useful if
- * you want to print the object. If conversion to a string fails
- * (eg. due to an exception in the toString() method of the object)
- * then the length() method returns 0 and the * operator returns
- * NULL.
- */
- class V8EXPORT Utf8Value {
- public:
- explicit Utf8Value(Handle<v8::Value> obj);
- ~Utf8Value();
- char* operator*() { return str_; }
- const char* operator*() const { return str_; }
- int length() const { return length_; }
- private:
- char* str_;
- int length_;
-
- // Disallow copying and assigning.
- Utf8Value(const Utf8Value&);
- void operator=(const Utf8Value&);
- };
-
- /**
- * Converts an object to an ascii string.
- * Useful if you want to print the object.
- * If conversion to a string fails (eg. due to an exception in the toString()
- * method of the object) then the length() method returns 0 and the * operator
- * returns NULL.
- */
- class V8EXPORT AsciiValue {
- public:
- explicit AsciiValue(Handle<v8::Value> obj);
- ~AsciiValue();
- char* operator*() { return str_; }
- const char* operator*() const { return str_; }
- int length() const { return length_; }
- private:
- char* str_;
- int length_;
-
- // Disallow copying and assigning.
- AsciiValue(const AsciiValue&);
- void operator=(const AsciiValue&);
- };
-
- /**
- * Converts an object to a two-byte string.
- * If conversion to a string fails (eg. due to an exception in the toString()
- * method of the object) then the length() method returns 0 and the * operator
- * returns NULL.
- */
- class V8EXPORT Value {
- public:
- explicit Value(Handle<v8::Value> obj);
- ~Value();
- uint16_t* operator*() { return str_; }
- const uint16_t* operator*() const { return str_; }
- int length() const { return length_; }
- private:
- uint16_t* str_;
- int length_;
-
- // Disallow copying and assigning.
- Value(const Value&);
- void operator=(const Value&);
- };
-
- private:
- V8EXPORT void VerifyExternalStringResource(ExternalStringResource* val) const;
- V8EXPORT static void CheckCast(v8::Value* obj);
-};
-
-
-/**
- * A JavaScript number value (ECMA-262, 4.3.20)
- */
-class Number : public Primitive {
- public:
- V8EXPORT double Value() const;
- V8EXPORT static Local<Number> New(double value);
- static inline Number* Cast(v8::Value* obj);
- private:
- V8EXPORT Number();
- static void CheckCast(v8::Value* obj);
-};
-
-
-/**
- * A JavaScript value representing a signed integer.
- */
-class Integer : public Number {
- public:
- V8EXPORT static Local<Integer> New(int32_t value);
- V8EXPORT static Local<Integer> NewFromUnsigned(uint32_t value);
- V8EXPORT int64_t Value() const;
- static inline Integer* Cast(v8::Value* obj);
- private:
- V8EXPORT Integer();
- V8EXPORT static void CheckCast(v8::Value* obj);
-};
-
-
-/**
- * A JavaScript value representing a 32-bit signed integer.
- */
-class Int32 : public Integer {
- public:
- V8EXPORT int32_t Value() const;
- private:
- V8EXPORT Int32();
-};
-
-
-/**
- * A JavaScript value representing a 32-bit unsigned integer.
- */
-class Uint32 : public Integer {
- public:
- V8EXPORT uint32_t Value() const;
- private:
- V8EXPORT Uint32();
-};
-
-
-/**
- * An instance of the built-in Date constructor (ECMA-262, 15.9).
- */
-class Date : public Value {
- public:
- V8EXPORT static Local<Value> New(double time);
-
- /**
- * A specialization of Value::NumberValue that is more efficient
- * because we know the structure of this object.
- */
- V8EXPORT double NumberValue() const;
-
- static inline Date* Cast(v8::Value* obj);
- private:
- V8EXPORT static void CheckCast(v8::Value* obj);
-};
-
-
-enum PropertyAttribute {
- None = 0,
- ReadOnly = 1 << 0,
- DontEnum = 1 << 1,
- DontDelete = 1 << 2
-};
-
-enum ExternalArrayType {
- kExternalByteArray = 1,
- kExternalUnsignedByteArray,
- kExternalShortArray,
- kExternalUnsignedShortArray,
- kExternalIntArray,
- kExternalUnsignedIntArray,
- kExternalFloatArray
-};
-
-/**
- * Accessor[Getter|Setter] are used as callback functions when
- * setting|getting a particular property. See Object and ObjectTemplate's
- * method SetAccessor.
- */
-typedef Handle<Value> (*AccessorGetter)(Local<String> property,
- const AccessorInfo& info);
-
-
-typedef void (*AccessorSetter)(Local<String> property,
- Local<Value> value,
- const AccessorInfo& info);
-
-
-/**
- * Access control specifications.
- *
- * Some accessors should be accessible across contexts. These
- * accessors have an explicit access control parameter which specifies
- * the kind of cross-context access that should be allowed.
- *
- * Additionally, for security, accessors can prohibit overwriting by
- * accessors defined in JavaScript. For objects that have such
- * accessors either locally or in their prototype chain it is not
- * possible to overwrite the accessor by using __defineGetter__ or
- * __defineSetter__ from JavaScript code.
- */
-enum AccessControl {
- DEFAULT = 0,
- ALL_CAN_READ = 1,
- ALL_CAN_WRITE = 1 << 1,
- PROHIBITS_OVERWRITING = 1 << 2
-};
-
-
-/**
- * A JavaScript object (ECMA-262, 4.3.3)
- */
-class Object : public Value {
- public:
- V8EXPORT bool Set(Handle<Value> key,
- Handle<Value> value,
- PropertyAttribute attribs = None);
-
- V8EXPORT bool Set(uint32_t index,
- Handle<Value> value);
-
- // Sets a local property on this object bypassing interceptors and
- // overriding accessors or read-only properties.
- //
- // Note that if the object has an interceptor the property will be set
- // locally, but since the interceptor takes precedence the local property
- // will only be returned if the interceptor doesn't return a value.
- //
- // Note also that this only works for named properties.
- V8EXPORT bool ForceSet(Handle<Value> key,
- Handle<Value> value,
- PropertyAttribute attribs = None);
-
- V8EXPORT Local<Value> Get(Handle<Value> key);
-
- V8EXPORT Local<Value> Get(uint32_t index);
-
- // TODO(1245389): Replace the type-specific versions of these
- // functions with generic ones that accept a Handle<Value> key.
- V8EXPORT bool Has(Handle<String> key);
-
- V8EXPORT bool Delete(Handle<String> key);
-
- // Delete a property on this object bypassing interceptors and
- // ignoring dont-delete attributes.
- V8EXPORT bool ForceDelete(Handle<Value> key);
-
- V8EXPORT bool Has(uint32_t index);
-
- V8EXPORT bool Delete(uint32_t index);
-
- V8EXPORT bool SetAccessor(Handle<String> name,
- AccessorGetter getter,
- AccessorSetter setter = 0,
- Handle<Value> data = Handle<Value>(),
- AccessControl settings = DEFAULT,
- PropertyAttribute attribute = None);
-
- /**
- * Returns an array containing the names of the enumerable properties
- * of this object, including properties from prototype objects. The
- * array returned by this method contains the same values as would
- * be enumerated by a for-in statement over this object.
- */
- V8EXPORT Local<Array> GetPropertyNames();
-
- /**
- * Get the prototype object. This does not skip objects marked to
- * be skipped by __proto__ and it does not consult the security
- * handler.
- */
- V8EXPORT Local<Value> GetPrototype();
-
- /**
- * Set the prototype object. This does not skip objects marked to
- * be skipped by __proto__ and it does not consult the security
- * handler.
- */
- V8EXPORT bool SetPrototype(Handle<Value> prototype);
-
- /**
- * Finds an instance of the given function template in the prototype
- * chain.
- */
- V8EXPORT Local<Object> FindInstanceInPrototypeChain(
- Handle<FunctionTemplate> tmpl);
-
- /**
- * Call builtin Object.prototype.toString on this object.
- * This is different from Value::ToString() that may call
- * user-defined toString function. This one does not.
- */
- V8EXPORT Local<String> ObjectProtoToString();
-
- /** Gets the number of internal fields for this Object. */
- V8EXPORT int InternalFieldCount();
- /** Gets the value in an internal field. */
- inline Local<Value> GetInternalField(int index);
- /** Sets the value in an internal field. */
- V8EXPORT void SetInternalField(int index, Handle<Value> value);
-
- /** Gets a native pointer from an internal field. */
- inline void* GetPointerFromInternalField(int index);
-
- /** Sets a native pointer in an internal field. */
- V8EXPORT void SetPointerInInternalField(int index, void* value);
-
- // Testers for local properties.
- V8EXPORT bool HasRealNamedProperty(Handle<String> key);
- V8EXPORT bool HasRealIndexedProperty(uint32_t index);
- V8EXPORT bool HasRealNamedCallbackProperty(Handle<String> key);
-
- /**
- * If result.IsEmpty() no real property was located in the prototype chain.
- * This means interceptors in the prototype chain are not called.
- */
- V8EXPORT Local<Value> GetRealNamedPropertyInPrototypeChain(
- Handle<String> key);
-
- /**
- * If result.IsEmpty() no real property was located on the object or
- * in the prototype chain.
- * This means interceptors in the prototype chain are not called.
- */
- V8EXPORT Local<Value> GetRealNamedProperty(Handle<String> key);
-
- /** Tests for a named lookup interceptor.*/
- V8EXPORT bool HasNamedLookupInterceptor();
-
- /** Tests for an index lookup interceptor.*/
- V8EXPORT bool HasIndexedLookupInterceptor();
-
- /**
- * Turns on access check on the object if the object is an instance of
- * a template that has access check callbacks. If an object has no
- * access check info, the object cannot be accessed by anyone.
- */
- V8EXPORT void TurnOnAccessCheck();
-
- /**
- * Returns the identity hash for this object. The current implemenation uses
- * a hidden property on the object to store the identity hash.
- *
- * The return value will never be 0. Also, it is not guaranteed to be
- * unique.
- */
- V8EXPORT int GetIdentityHash();
-
- /**
- * Access hidden properties on JavaScript objects. These properties are
- * hidden from the executing JavaScript and only accessible through the V8
- * C++ API. Hidden properties introduced by V8 internally (for example the
- * identity hash) are prefixed with "v8::".
- */
- V8EXPORT bool SetHiddenValue(Handle<String> key, Handle<Value> value);
- V8EXPORT Local<Value> GetHiddenValue(Handle<String> key);
- V8EXPORT bool DeleteHiddenValue(Handle<String> key);
-
- /**
- * Returns true if this is an instance of an api function (one
- * created from a function created from a function template) and has
- * been modified since it was created. Note that this method is
- * conservative and may return true for objects that haven't actually
- * been modified.
- */
- V8EXPORT bool IsDirty();
-
- /**
- * Clone this object with a fast but shallow copy. Values will point
- * to the same values as the original object.
- */
- V8EXPORT Local<Object> Clone();
-
- /**
- * Set the backing store of the indexed properties to be managed by the
- * embedding layer. Access to the indexed properties will follow the rules
- * spelled out in CanvasPixelArray.
- * Note: The embedding program still owns the data and needs to ensure that
- * the backing store is preserved while V8 has a reference.
- */
- V8EXPORT void SetIndexedPropertiesToPixelData(uint8_t* data, int length);
- bool HasIndexedPropertiesInPixelData();
- uint8_t* GetIndexedPropertiesPixelData();
- int GetIndexedPropertiesPixelDataLength();
-
- /**
- * Set the backing store of the indexed properties to be managed by the
- * embedding layer. Access to the indexed properties will follow the rules
- * spelled out for the CanvasArray subtypes in the WebGL specification.
- * Note: The embedding program still owns the data and needs to ensure that
- * the backing store is preserved while V8 has a reference.
- */
- V8EXPORT void SetIndexedPropertiesToExternalArrayData(
- void* data,
- ExternalArrayType array_type,
- int number_of_elements);
- bool HasIndexedPropertiesInExternalArrayData();
- void* GetIndexedPropertiesExternalArrayData();
- ExternalArrayType GetIndexedPropertiesExternalArrayDataType();
- int GetIndexedPropertiesExternalArrayDataLength();
-
- V8EXPORT static Local<Object> New();
- static inline Object* Cast(Value* obj);
- private:
- V8EXPORT Object();
- V8EXPORT static void CheckCast(Value* obj);
- V8EXPORT Local<Value> CheckedGetInternalField(int index);
- V8EXPORT void* SlowGetPointerFromInternalField(int index);
-
- /**
- * If quick access to the internal field is possible this method
- * returns the value. Otherwise an empty handle is returned.
- */
- inline Local<Value> UncheckedGetInternalField(int index);
-};
-
-
-/**
- * An instance of the built-in array constructor (ECMA-262, 15.4.2).
- */
-class Array : public Object {
- public:
- V8EXPORT uint32_t Length() const;
-
- /**
- * Clones an element at index |index|. Returns an empty
- * handle if cloning fails (for any reason).
- */
- V8EXPORT Local<Object> CloneElementAt(uint32_t index);
-
- V8EXPORT static Local<Array> New(int length = 0);
- static inline Array* Cast(Value* obj);
- private:
- V8EXPORT Array();
- static void CheckCast(Value* obj);
-};
-
-
-/**
- * A JavaScript function object (ECMA-262, 15.3).
- */
-class Function : public Object {
- public:
- V8EXPORT Local<Object> NewInstance() const;
- V8EXPORT Local<Object> NewInstance(int argc, Handle<Value> argv[]) const;
- V8EXPORT Local<Value> Call(Handle<Object> recv,
- int argc,
- Handle<Value> argv[]);
- V8EXPORT void SetName(Handle<String> name);
- V8EXPORT Handle<Value> GetName() const;
-
- /**
- * Returns zero based line number of function body and
- * kLineOffsetNotFound if no information available.
- */
- V8EXPORT int GetScriptLineNumber() const;
- V8EXPORT ScriptOrigin GetScriptOrigin() const;
- static inline Function* Cast(Value* obj);
- V8EXPORT static const int kLineOffsetNotFound;
- private:
- V8EXPORT Function();
- V8EXPORT static void CheckCast(Value* obj);
-};
-
-
-/**
- * A JavaScript value that wraps a C++ void*. This type of value is
- * mainly used to associate C++ data structures with JavaScript
- * objects.
- *
- * The Wrap function V8 will return the most optimal Value object wrapping the
- * C++ void*. The type of the value is not guaranteed to be an External object
- * and no assumptions about its type should be made. To access the wrapped
- * value Unwrap should be used, all other operations on that object will lead
- * to unpredictable results.
- */
-class External : public Value {
- public:
- V8EXPORT static Local<Value> Wrap(void* data);
- static inline void* Unwrap(Handle<Value> obj);
-
- V8EXPORT static Local<External> New(void* value);
- static inline External* Cast(Value* obj);
- V8EXPORT void* Value() const;
- private:
- V8EXPORT External();
- V8EXPORT static void CheckCast(v8::Value* obj);
- static inline void* QuickUnwrap(Handle<v8::Value> obj);
- V8EXPORT static void* FullUnwrap(Handle<v8::Value> obj);
-};
-
-
-// --- T e m p l a t e s ---
-
-
-/**
- * The superclass of object and function templates.
- */
-class V8EXPORT Template : public Data {
- public:
- /** Adds a property to each instance created by this template.*/
- void Set(Handle<String> name, Handle<Data> value,
- PropertyAttribute attributes = None);
- inline void Set(const char* name, Handle<Data> value);
- private:
- Template();
-
- friend class ObjectTemplate;
- friend class FunctionTemplate;
-};
-
-
-/**
- * The argument information given to function call callbacks. This
- * class provides access to information about the context of the call,
- * including the receiver, the number and values of arguments, and
- * the holder of the function.
- */
-class Arguments {
- public:
- inline int Length() const;
- inline Local<Value> operator[](int i) const;
- inline Local<Function> Callee() const;
- inline Local<Object> This() const;
- inline Local<Object> Holder() const;
- inline bool IsConstructCall() const;
- inline Local<Value> Data() const;
- private:
- friend class ImplementationUtilities;
- inline Arguments(Local<Value> data,
- Local<Object> holder,
- Local<Function> callee,
- bool is_construct_call,
- void** values, int length);
- Local<Value> data_;
- Local<Object> holder_;
- Local<Function> callee_;
- bool is_construct_call_;
- void** values_;
- int length_;
-};
-
-
-/**
- * The information passed to an accessor callback about the context
- * of the property access.
- */
-class V8EXPORT AccessorInfo {
- public:
- inline AccessorInfo(internal::Object** args)
- : args_(args) { }
- inline Local<Value> Data() const;
- inline Local<Object> This() const;
- inline Local<Object> Holder() const;
- private:
- internal::Object** args_;
-};
-
-
-typedef Handle<Value> (*InvocationCallback)(const Arguments& args);
-
-/**
- * NamedProperty[Getter|Setter] are used as interceptors on object.
- * See ObjectTemplate::SetNamedPropertyHandler.
- */
-typedef Handle<Value> (*NamedPropertyGetter)(Local<String> property,
- const AccessorInfo& info);
-
-
-/**
- * Returns the value if the setter intercepts the request.
- * Otherwise, returns an empty handle.
- */
-typedef Handle<Value> (*NamedPropertySetter)(Local<String> property,
- Local<Value> value,
- const AccessorInfo& info);
-
-/**
- * Returns a non-empty handle if the interceptor intercepts the request.
- * The result is an integer encoding property attributes (like v8::None,
- * v8::DontEnum, etc.)
- */
-typedef Handle<Integer> (*NamedPropertyQuery)(Local<String> property,
- const AccessorInfo& info);
-
-
-/**
- * Returns a non-empty handle if the deleter intercepts the request.
- * The return value is true if the property could be deleted and false
- * otherwise.
- */
-typedef Handle<Boolean> (*NamedPropertyDeleter)(Local<String> property,
- const AccessorInfo& info);
-
-/**
- * Returns an array containing the names of the properties the named
- * property getter intercepts.
- */
-typedef Handle<Array> (*NamedPropertyEnumerator)(const AccessorInfo& info);
-
-
-/**
- * Returns the value of the property if the getter intercepts the
- * request. Otherwise, returns an empty handle.
- */
-typedef Handle<Value> (*IndexedPropertyGetter)(uint32_t index,
- const AccessorInfo& info);
-
-
-/**
- * Returns the value if the setter intercepts the request.
- * Otherwise, returns an empty handle.
- */
-typedef Handle<Value> (*IndexedPropertySetter)(uint32_t index,
- Local<Value> value,
- const AccessorInfo& info);
-
-
-/**
- * Returns a non-empty handle if the interceptor intercepts the request.
- * The result is an integer encoding property attributes.
- */
-typedef Handle<Integer> (*IndexedPropertyQuery)(uint32_t index,
- const AccessorInfo& info);
-
-/**
- * Returns a non-empty handle if the deleter intercepts the request.
- * The return value is true if the property could be deleted and false
- * otherwise.
- */
-typedef Handle<Boolean> (*IndexedPropertyDeleter)(uint32_t index,
- const AccessorInfo& info);
-
-/**
- * Returns an array containing the indices of the properties the
- * indexed property getter intercepts.
- */
-typedef Handle<Array> (*IndexedPropertyEnumerator)(const AccessorInfo& info);
-
-
-/**
- * Access type specification.
- */
-enum AccessType {
- ACCESS_GET,
- ACCESS_SET,
- ACCESS_HAS,
- ACCESS_DELETE,
- ACCESS_KEYS
-};
-
-
-/**
- * Returns true if cross-context access should be allowed to the named
- * property with the given key on the host object.
- */
-typedef bool (*NamedSecurityCallback)(Local<Object> host,
- Local<Value> key,
- AccessType type,
- Local<Value> data);
-
-
-/**
- * Returns true if cross-context access should be allowed to the indexed
- * property with the given index on the host object.
- */
-typedef bool (*IndexedSecurityCallback)(Local<Object> host,
- uint32_t index,
- AccessType type,
- Local<Value> data);
-
-
-/**
- * A FunctionTemplate is used to create functions at runtime. There
- * can only be one function created from a FunctionTemplate in a
- * context. The lifetime of the created function is equal to the
- * lifetime of the context. So in case the embedder needs to create
- * temporary functions that can be collected using Scripts is
- * preferred.
- *
- * A FunctionTemplate can have properties, these properties are added to the
- * function object when it is created.
- *
- * A FunctionTemplate has a corresponding instance template which is
- * used to create object instances when the function is used as a
- * constructor. Properties added to the instance template are added to
- * each object instance.
- *
- * A FunctionTemplate can have a prototype template. The prototype template
- * is used to create the prototype object of the function.
- *
- * The following example shows how to use a FunctionTemplate:
- *
- * \code
- * v8::Local<v8::FunctionTemplate> t = v8::FunctionTemplate::New();
- * t->Set("func_property", v8::Number::New(1));
- *
- * v8::Local<v8::Template> proto_t = t->PrototypeTemplate();
- * proto_t->Set("proto_method", v8::FunctionTemplate::New(InvokeCallback));
- * proto_t->Set("proto_const", v8::Number::New(2));
- *
- * v8::Local<v8::ObjectTemplate> instance_t = t->InstanceTemplate();
- * instance_t->SetAccessor("instance_accessor", InstanceAccessorCallback);
- * instance_t->SetNamedPropertyHandler(PropertyHandlerCallback, ...);
- * instance_t->Set("instance_property", Number::New(3));
- *
- * v8::Local<v8::Function> function = t->GetFunction();
- * v8::Local<v8::Object> instance = function->NewInstance();
- * \endcode
- *
- * Let's use "function" as the JS variable name of the function object
- * and "instance" for the instance object created above. The function
- * and the instance will have the following properties:
- *
- * \code
- * func_property in function == true;
- * function.func_property == 1;
- *
- * function.prototype.proto_method() invokes 'InvokeCallback'
- * function.prototype.proto_const == 2;
- *
- * instance instanceof function == true;
- * instance.instance_accessor calls 'InstanceAccessorCallback'
- * instance.instance_property == 3;
- * \endcode
- *
- * A FunctionTemplate can inherit from another one by calling the
- * FunctionTemplate::Inherit method. The following graph illustrates
- * the semantics of inheritance:
- *
- * \code
- * FunctionTemplate Parent -> Parent() . prototype -> { }
- * ^ ^
- * | Inherit(Parent) | .__proto__
- * | |
- * FunctionTemplate Child -> Child() . prototype -> { }
- * \endcode
- *
- * A FunctionTemplate 'Child' inherits from 'Parent', the prototype
- * object of the Child() function has __proto__ pointing to the
- * Parent() function's prototype object. An instance of the Child
- * function has all properties on Parent's instance templates.
- *
- * Let Parent be the FunctionTemplate initialized in the previous
- * section and create a Child FunctionTemplate by:
- *
- * \code
- * Local<FunctionTemplate> parent = t;
- * Local<FunctionTemplate> child = FunctionTemplate::New();
- * child->Inherit(parent);
- *
- * Local<Function> child_function = child->GetFunction();
- * Local<Object> child_instance = child_function->NewInstance();
- * \endcode
- *
- * The Child function and Child instance will have the following
- * properties:
- *
- * \code
- * child_func.prototype.__proto__ == function.prototype;
- * child_instance.instance_accessor calls 'InstanceAccessorCallback'
- * child_instance.instance_property == 3;
- * \endcode
- */
-class V8EXPORT FunctionTemplate : public Template {
- public:
- /** Creates a function template.*/
- static Local<FunctionTemplate> New(
- InvocationCallback callback = 0,
- Handle<Value> data = Handle<Value>(),
- Handle<Signature> signature = Handle<Signature>());
- /** Returns the unique function instance in the current execution context.*/
- Local<Function> GetFunction();
-
- /**
- * Set the call-handler callback for a FunctionTemplate. This
- * callback is called whenever the function created from this
- * FunctionTemplate is called.
- */
- void SetCallHandler(InvocationCallback callback,
- Handle<Value> data = Handle<Value>());
-
- /** Get the InstanceTemplate. */
- Local<ObjectTemplate> InstanceTemplate();
-
- /** Causes the function template to inherit from a parent function template.*/
- void Inherit(Handle<FunctionTemplate> parent);
-
- /**
- * A PrototypeTemplate is the template used to create the prototype object
- * of the function created by this template.
- */
- Local<ObjectTemplate> PrototypeTemplate();
-
-
- /**
- * Set the class name of the FunctionTemplate. This is used for
- * printing objects created with the function created from the
- * FunctionTemplate as its constructor.
- */
- void SetClassName(Handle<String> name);
-
- /**
- * Determines whether the __proto__ accessor ignores instances of
- * the function template. If instances of the function template are
- * ignored, __proto__ skips all instances and instead returns the
- * next object in the prototype chain.
- *
- * Call with a value of true to make the __proto__ accessor ignore
- * instances of the function template. Call with a value of false
- * to make the __proto__ accessor not ignore instances of the
- * function template. By default, instances of a function template
- * are not ignored.
- */
- void SetHiddenPrototype(bool value);
-
- /**
- * Returns true if the given object is an instance of this function
- * template.
- */
- bool HasInstance(Handle<Value> object);
-
- private:
- FunctionTemplate();
- void AddInstancePropertyAccessor(Handle<String> name,
- AccessorGetter getter,
- AccessorSetter setter,
- Handle<Value> data,
- AccessControl settings,
- PropertyAttribute attributes);
- void SetNamedInstancePropertyHandler(NamedPropertyGetter getter,
- NamedPropertySetter setter,
- NamedPropertyQuery query,
- NamedPropertyDeleter remover,
- NamedPropertyEnumerator enumerator,
- Handle<Value> data);
- void SetIndexedInstancePropertyHandler(IndexedPropertyGetter getter,
- IndexedPropertySetter setter,
- IndexedPropertyQuery query,
- IndexedPropertyDeleter remover,
- IndexedPropertyEnumerator enumerator,
- Handle<Value> data);
- void SetInstanceCallAsFunctionHandler(InvocationCallback callback,
- Handle<Value> data);
-
- friend class Context;
- friend class ObjectTemplate;
-};
-
-
-/**
- * An ObjectTemplate is used to create objects at runtime.
- *
- * Properties added to an ObjectTemplate are added to each object
- * created from the ObjectTemplate.
- */
-class V8EXPORT ObjectTemplate : public Template {
- public:
- /** Creates an ObjectTemplate. */
- static Local<ObjectTemplate> New();
-
- /** Creates a new instance of this template.*/
- Local<Object> NewInstance();
-
- /**
- * Sets an accessor on the object template.
- *
- * Whenever the property with the given name is accessed on objects
- * created from this ObjectTemplate the getter and setter callbacks
- * are called instead of getting and setting the property directly
- * on the JavaScript object.
- *
- * \param name The name of the property for which an accessor is added.
- * \param getter The callback to invoke when getting the property.
- * \param setter The callback to invoke when setting the property.
- * \param data A piece of data that will be passed to the getter and setter
- * callbacks whenever they are invoked.
- * \param settings Access control settings for the accessor. This is a bit
- * field consisting of one of more of
- * DEFAULT = 0, ALL_CAN_READ = 1, or ALL_CAN_WRITE = 2.
- * The default is to not allow cross-context access.
- * ALL_CAN_READ means that all cross-context reads are allowed.
- * ALL_CAN_WRITE means that all cross-context writes are allowed.
- * The combination ALL_CAN_READ | ALL_CAN_WRITE can be used to allow all
- * cross-context access.
- * \param attribute The attributes of the property for which an accessor
- * is added.
- */
- void SetAccessor(Handle<String> name,
- AccessorGetter getter,
- AccessorSetter setter = 0,
- Handle<Value> data = Handle<Value>(),
- AccessControl settings = DEFAULT,
- PropertyAttribute attribute = None);
-
- /**
- * Sets a named property handler on the object template.
- *
- * Whenever a named property is accessed on objects created from
- * this object template, the provided callback is invoked instead of
- * accessing the property directly on the JavaScript object.
- *
- * \param getter The callback to invoke when getting a property.
- * \param setter The callback to invoke when setting a property.
- * \param query The callback to invoke to check if a property is present,
- * and if present, get its attributes.
- * \param deleter The callback to invoke when deleting a property.
- * \param enumerator The callback to invoke to enumerate all the named
- * properties of an object.
- * \param data A piece of data that will be passed to the callbacks
- * whenever they are invoked.
- */
- void SetNamedPropertyHandler(NamedPropertyGetter getter,
- NamedPropertySetter setter = 0,
- NamedPropertyQuery query = 0,
- NamedPropertyDeleter deleter = 0,
- NamedPropertyEnumerator enumerator = 0,
- Handle<Value> data = Handle<Value>());
-
- /**
- * Sets an indexed property handler on the object template.
- *
- * Whenever an indexed property is accessed on objects created from
- * this object template, the provided callback is invoked instead of
- * accessing the property directly on the JavaScript object.
- *
- * \param getter The callback to invoke when getting a property.
- * \param setter The callback to invoke when setting a property.
- * \param query The callback to invoke to check is an object has a property.
- * \param deleter The callback to invoke when deleting a property.
- * \param enumerator The callback to invoke to enumerate all the indexed
- * properties of an object.
- * \param data A piece of data that will be passed to the callbacks
- * whenever they are invoked.
- */
- void SetIndexedPropertyHandler(IndexedPropertyGetter getter,
- IndexedPropertySetter setter = 0,
- IndexedPropertyQuery query = 0,
- IndexedPropertyDeleter deleter = 0,
- IndexedPropertyEnumerator enumerator = 0,
- Handle<Value> data = Handle<Value>());
-
- /**
- * Sets the callback to be used when calling instances created from
- * this template as a function. If no callback is set, instances
- * behave like normal JavaScript objects that cannot be called as a
- * function.
- */
- void SetCallAsFunctionHandler(InvocationCallback callback,
- Handle<Value> data = Handle<Value>());
-
- /**
- * Mark object instances of the template as undetectable.
- *
- * In many ways, undetectable objects behave as though they are not
- * there. They behave like 'undefined' in conditionals and when
- * printed. However, properties can be accessed and called as on
- * normal objects.
- */
- void MarkAsUndetectable();
-
- /**
- * Sets access check callbacks on the object template.
- *
- * When accessing properties on instances of this object template,
- * the access check callback will be called to determine whether or
- * not to allow cross-context access to the properties.
- * The last parameter specifies whether access checks are turned
- * on by default on instances. If access checks are off by default,
- * they can be turned on on individual instances by calling
- * Object::TurnOnAccessCheck().
- */
- void SetAccessCheckCallbacks(NamedSecurityCallback named_handler,
- IndexedSecurityCallback indexed_handler,
- Handle<Value> data = Handle<Value>(),
- bool turned_on_by_default = true);
-
- /**
- * Gets the number of internal fields for objects generated from
- * this template.
- */
- int InternalFieldCount();
-
- /**
- * Sets the number of internal fields for objects generated from
- * this template.
- */
- void SetInternalFieldCount(int value);
-
- private:
- ObjectTemplate();
- static Local<ObjectTemplate> New(Handle<FunctionTemplate> constructor);
- friend class FunctionTemplate;
-};
-
-
-/**
- * A Signature specifies which receivers and arguments a function can
- * legally be called with.
- */
-class V8EXPORT Signature : public Data {
- public:
- static Local<Signature> New(Handle<FunctionTemplate> receiver =
- Handle<FunctionTemplate>(),
- int argc = 0,
- Handle<FunctionTemplate> argv[] = 0);
- private:
- Signature();
-};
-
-
-/**
- * A utility for determining the type of objects based on the template
- * they were constructed from.
- */
-class V8EXPORT TypeSwitch : public Data {
- public:
- static Local<TypeSwitch> New(Handle<FunctionTemplate> type);
- static Local<TypeSwitch> New(int argc, Handle<FunctionTemplate> types[]);
- int match(Handle<Value> value);
- private:
- TypeSwitch();
-};
-
-
-// --- E x t e n s i o n s ---
-
-
-/**
- * Ignore
- */
-class V8EXPORT Extension { // NOLINT
- public:
- Extension(const char* name,
- const char* source = 0,
- int dep_count = 0,
- const char** deps = 0);
- virtual ~Extension() { }
- virtual v8::Handle<v8::FunctionTemplate>
- GetNativeFunction(v8::Handle<v8::String> name) {
- return v8::Handle<v8::FunctionTemplate>();
- }
-
- const char* name() { return name_; }
- const char* source() { return source_; }
- int dependency_count() { return dep_count_; }
- const char** dependencies() { return deps_; }
- void set_auto_enable(bool value) { auto_enable_ = value; }
- bool auto_enable() { return auto_enable_; }
-
- private:
- const char* name_;
- const char* source_;
- int dep_count_;
- const char** deps_;
- bool auto_enable_;
-
- // Disallow copying and assigning.
- Extension(const Extension&);
- void operator=(const Extension&);
-};
-
-
-void V8EXPORT RegisterExtension(Extension* extension);
-
-
-/**
- * Ignore
- */
-class V8EXPORT DeclareExtension {
- public:
- inline DeclareExtension(Extension* extension) {
- RegisterExtension(extension);
- }
-};
-
-
-// --- S t a t i c s ---
-
-
-Handle<Primitive> V8EXPORT Undefined();
-Handle<Primitive> V8EXPORT Null();
-Handle<Boolean> V8EXPORT True();
-Handle<Boolean> V8EXPORT False();
-
-
-/**
- * A set of constraints that specifies the limits of the runtime's memory use.
- * You must set the heap size before initializing the VM - the size cannot be
- * adjusted after the VM is initialized.
- *
- * If you are using threads then you should hold the V8::Locker lock while
- * setting the stack limit and you must set a non-default stack limit separately
- * for each thread.
- */
-class V8EXPORT ResourceConstraints {
- public:
- ResourceConstraints();
- int max_young_space_size() const { return max_young_space_size_; }
- void set_max_young_space_size(int value) { max_young_space_size_ = value; }
- int max_old_space_size() const { return max_old_space_size_; }
- void set_max_old_space_size(int value) { max_old_space_size_ = value; }
- uint32_t* stack_limit() const { return stack_limit_; }
- // Sets an address beyond which the VM's stack may not grow.
- void set_stack_limit(uint32_t* value) { stack_limit_ = value; }
- private:
- int max_young_space_size_;
- int max_old_space_size_;
- uint32_t* stack_limit_;
-};
-
-
-bool V8EXPORT SetResourceConstraints(ResourceConstraints* constraints);
-
-
-// --- E x c e p t i o n s ---
-
-
-typedef void (*FatalErrorCallback)(const char* location, const char* message);
-
-
-typedef void (*MessageCallback)(Handle<Message> message, Handle<Value> data);
-
-
-/**
- * Schedules an exception to be thrown when returning to JavaScript. When an
- * exception has been scheduled it is illegal to invoke any JavaScript
- * operation; the caller must return immediately and only after the exception
- * has been handled does it become legal to invoke JavaScript operations.
- */
-Handle<Value> V8EXPORT ThrowException(Handle<Value> exception);
-
-/**
- * Create new error objects by calling the corresponding error object
- * constructor with the message.
- */
-class V8EXPORT Exception {
- public:
- static Local<Value> RangeError(Handle<String> message);
- static Local<Value> ReferenceError(Handle<String> message);
- static Local<Value> SyntaxError(Handle<String> message);
- static Local<Value> TypeError(Handle<String> message);
- static Local<Value> Error(Handle<String> message);
-};
-
-
-// --- C o u n t e r s C a l l b a c k s ---
-
-typedef int* (*CounterLookupCallback)(const char* name);
-
-typedef void* (*CreateHistogramCallback)(const char* name,
- int min,
- int max,
- size_t buckets);
-
-typedef void (*AddHistogramSampleCallback)(void* histogram, int sample);
-
-// --- M e m o r y A l l o c a t i o n C a l l b a c k ---
- enum ObjectSpace {
- kObjectSpaceNewSpace = 1 << 0,
- kObjectSpaceOldPointerSpace = 1 << 1,
- kObjectSpaceOldDataSpace = 1 << 2,
- kObjectSpaceCodeSpace = 1 << 3,
- kObjectSpaceMapSpace = 1 << 4,
- kObjectSpaceLoSpace = 1 << 5,
-
- kObjectSpaceAll = kObjectSpaceNewSpace | kObjectSpaceOldPointerSpace |
- kObjectSpaceOldDataSpace | kObjectSpaceCodeSpace | kObjectSpaceMapSpace |
- kObjectSpaceLoSpace
- };
-
- enum AllocationAction {
- kAllocationActionAllocate = 1 << 0,
- kAllocationActionFree = 1 << 1,
- kAllocationActionAll = kAllocationActionAllocate | kAllocationActionFree
- };
-
-typedef void (*MemoryAllocationCallback)(ObjectSpace space,
- AllocationAction action,
- int size);
-
-// --- F a i l e d A c c e s s C h e c k C a l l b a c k ---
-typedef void (*FailedAccessCheckCallback)(Local<Object> target,
- AccessType type,
- Local<Value> data);
-
-// --- G a r b a g e C o l l e c t i o n C a l l b a c k s
-
-/**
- * Applications can register callback functions which will be called
- * before and after a garbage collection. Allocations are not
- * allowed in the callback functions, you therefore cannot manipulate
- * objects (set or delete properties for example) since it is possible
- * such operations will result in the allocation of objects.
- */
-enum GCType {
- kGCTypeScavenge = 1 << 0,
- kGCTypeMarkSweepCompact = 1 << 1,
- kGCTypeAll = kGCTypeScavenge | kGCTypeMarkSweepCompact
-};
-
-enum GCCallbackFlags {
- kNoGCCallbackFlags = 0,
- kGCCallbackFlagCompacted = 1 << 0
-};
-
-typedef void (*GCPrologueCallback)(GCType type, GCCallbackFlags flags);
-typedef void (*GCEpilogueCallback)(GCType type, GCCallbackFlags flags);
-
-typedef void (*GCCallback)();
-
-
-/**
- * Profiler modules.
- *
- * In V8, profiler consists of several modules: CPU profiler, and different
- * kinds of heap profiling. Each can be turned on / off independently.
- * When PROFILER_MODULE_HEAP_SNAPSHOT flag is passed to ResumeProfilerEx,
- * modules are enabled only temporarily for making a snapshot of the heap.
- */
-enum ProfilerModules {
- PROFILER_MODULE_NONE = 0,
- PROFILER_MODULE_CPU = 1,
- PROFILER_MODULE_HEAP_STATS = 1 << 1,
- PROFILER_MODULE_JS_CONSTRUCTORS = 1 << 2,
- PROFILER_MODULE_HEAP_SNAPSHOT = 1 << 16
-};
-
-
-/**
- * Collection of V8 heap information.
- *
- * Instances of this class can be passed to v8::V8::HeapStatistics to
- * get heap statistics from V8.
- */
-class V8EXPORT HeapStatistics {
- public:
- HeapStatistics();
- size_t total_heap_size() { return total_heap_size_; }
- size_t used_heap_size() { return used_heap_size_; }
-
- private:
- void set_total_heap_size(size_t size) { total_heap_size_ = size; }
- void set_used_heap_size(size_t size) { used_heap_size_ = size; }
-
- size_t total_heap_size_;
- size_t used_heap_size_;
-
- friend class V8;
-};
-
-
-/**
- * Container class for static utility functions.
- */
-class V8EXPORT V8 {
- public:
- /** Set the callback to invoke in case of fatal errors. */
- static void SetFatalErrorHandler(FatalErrorCallback that);
-
- /**
- * Ignore out-of-memory exceptions.
- *
- * V8 running out of memory is treated as a fatal error by default.
- * This means that the fatal error handler is called and that V8 is
- * terminated.
- *
- * IgnoreOutOfMemoryException can be used to not treat a
- * out-of-memory situation as a fatal error. This way, the contexts
- * that did not cause the out of memory problem might be able to
- * continue execution.
- */
- static void IgnoreOutOfMemoryException();
-
- /**
- * Check if V8 is dead and therefore unusable. This is the case after
- * fatal errors such as out-of-memory situations.
- */
- static bool IsDead();
-
- /**
- * Adds a message listener.
- *
- * The same message listener can be added more than once and it that
- * case it will be called more than once for each message.
- */
- static bool AddMessageListener(MessageCallback that,
- Handle<Value> data = Handle<Value>());
-
- /**
- * Remove all message listeners from the specified callback function.
- */
- static void RemoveMessageListeners(MessageCallback that);
-
- /**
- * Tells V8 to capture current stack trace when uncaught exception occurs
- * and report it to the message listeners. The option is off by default.
- */
- static void SetCaptureStackTraceForUncaughtExceptions(
- bool capture,
- int frame_limit = 10,
- StackTrace::StackTraceOptions options = StackTrace::kOverview);
-
- /**
- * Sets V8 flags from a string.
- */
- static void SetFlagsFromString(const char* str, int length);
-
- /**
- * Sets V8 flags from the command line.
- */
- static void SetFlagsFromCommandLine(int* argc,
- char** argv,
- bool remove_flags);
-
- /** Get the version string. */
- static const char* GetVersion();
-
- /**
- * Enables the host application to provide a mechanism for recording
- * statistics counters.
- */
- static void SetCounterFunction(CounterLookupCallback);
-
- /**
- * Enables the host application to provide a mechanism for recording
- * histograms. The CreateHistogram function returns a
- * histogram which will later be passed to the AddHistogramSample
- * function.
- */
- static void SetCreateHistogramFunction(CreateHistogramCallback);
- static void SetAddHistogramSampleFunction(AddHistogramSampleCallback);
-
- /**
- * Enables the computation of a sliding window of states. The sliding
- * window information is recorded in statistics counters.
- */
- static void EnableSlidingStateWindow();
-
- /** Callback function for reporting failed access checks.*/
- static void SetFailedAccessCheckCallbackFunction(FailedAccessCheckCallback);
-
- /**
- * Enables the host application to receive a notification before a
- * garbage collection. Allocations are not allowed in the
- * callback function, you therefore cannot manipulate objects (set
- * or delete properties for example) since it is possible such
- * operations will result in the allocation of objects. It is possible
- * to specify the GCType filter for your callback. But it is not possible to
- * register the same callback function two times with different
- * GCType filters.
- */
- static void AddGCPrologueCallback(
- GCPrologueCallback callback, GCType gc_type_filter = kGCTypeAll);
-
- /**
- * This function removes callback which was installed by
- * AddGCPrologueCallback function.
- */
- static void RemoveGCPrologueCallback(GCPrologueCallback callback);
-
- /**
- * The function is deprecated. Please use AddGCPrologueCallback instead.
- * Enables the host application to receive a notification before a
- * garbage collection. Allocations are not allowed in the
- * callback function, you therefore cannot manipulate objects (set
- * or delete properties for example) since it is possible such
- * operations will result in the allocation of objects.
- */
- static void SetGlobalGCPrologueCallback(GCCallback);
-
- /**
- * Enables the host application to receive a notification after a
- * garbage collection. Allocations are not allowed in the
- * callback function, you therefore cannot manipulate objects (set
- * or delete properties for example) since it is possible such
- * operations will result in the allocation of objects. It is possible
- * to specify the GCType filter for your callback. But it is not possible to
- * register the same callback function two times with different
- * GCType filters.
- */
- static void AddGCEpilogueCallback(
- GCEpilogueCallback callback, GCType gc_type_filter = kGCTypeAll);
-
- /**
- * This function removes callback which was installed by
- * AddGCEpilogueCallback function.
- */
- static void RemoveGCEpilogueCallback(GCEpilogueCallback callback);
-
- /**
- * The function is deprecated. Please use AddGCEpilogueCallback instead.
- * Enables the host application to receive a notification after a
- * major garbage collection. Allocations are not allowed in the
- * callback function, you therefore cannot manipulate objects (set
- * or delete properties for example) since it is possible such
- * operations will result in the allocation of objects.
- */
- static void SetGlobalGCEpilogueCallback(GCCallback);
-
- /**
- * Enables the host application to provide a mechanism to be notified
- * and perform custom logging when V8 Allocates Executable Memory.
- */
- static void AddMemoryAllocationCallback(MemoryAllocationCallback callback,
- ObjectSpace space,
- AllocationAction action);
-
- /**
- * This function removes callback which was installed by
- * AddMemoryAllocationCallback function.
- */
- static void RemoveMemoryAllocationCallback(MemoryAllocationCallback callback);
-
- /**
- * Allows the host application to group objects together. If one
- * object in the group is alive, all objects in the group are alive.
- * After each garbage collection, object groups are removed. It is
- * intended to be used in the before-garbage-collection callback
- * function, for instance to simulate DOM tree connections among JS
- * wrapper objects.
- */
- static void AddObjectGroup(Persistent<Value>* objects, size_t length);
-
- /**
- * Initializes from snapshot if possible. Otherwise, attempts to
- * initialize from scratch. This function is called implicitly if
- * you use the API without calling it first.
- */
- static bool Initialize();
-
- /**
- * Adjusts the amount of registered external memory. Used to give
- * V8 an indication of the amount of externally allocated memory
- * that is kept alive by JavaScript objects. V8 uses this to decide
- * when to perform global garbage collections. Registering
- * externally allocated memory will trigger global garbage
- * collections more often than otherwise in an attempt to garbage
- * collect the JavaScript objects keeping the externally allocated
- * memory alive.
- *
- * \param change_in_bytes the change in externally allocated memory
- * that is kept alive by JavaScript objects.
- * \returns the adjusted value.
- */
- static int AdjustAmountOfExternalAllocatedMemory(int change_in_bytes);
-
- /**
- * Suspends recording of tick samples in the profiler.
- * When the V8 profiling mode is enabled (usually via command line
- * switches) this function suspends recording of tick samples.
- * Profiling ticks are discarded until ResumeProfiler() is called.
- *
- * See also the --prof and --prof_auto command line switches to
- * enable V8 profiling.
- */
- static void PauseProfiler();
-
- /**
- * Resumes recording of tick samples in the profiler.
- * See also PauseProfiler().
- */
- static void ResumeProfiler();
-
- /**
- * Return whether profiler is currently paused.
- */
- static bool IsProfilerPaused();
-
- /**
- * Resumes specified profiler modules. Can be called several times to
- * mark the opening of a profiler events block with the given tag.
- *
- * "ResumeProfiler" is equivalent to "ResumeProfilerEx(PROFILER_MODULE_CPU)".
- * See ProfilerModules enum.
- *
- * \param flags Flags specifying profiler modules.
- * \param tag Profile tag.
- */
- static void ResumeProfilerEx(int flags, int tag = 0);
-
- /**
- * Pauses specified profiler modules. Each call to "PauseProfilerEx" closes
- * a block of profiler events opened by a call to "ResumeProfilerEx" with the
- * same tag value. There is no need for blocks to be properly nested.
- * The profiler is paused when the last opened block is closed.
- *
- * "PauseProfiler" is equivalent to "PauseProfilerEx(PROFILER_MODULE_CPU)".
- * See ProfilerModules enum.
- *
- * \param flags Flags specifying profiler modules.
- * \param tag Profile tag.
- */
- static void PauseProfilerEx(int flags, int tag = 0);
-
- /**
- * Returns active (resumed) profiler modules.
- * See ProfilerModules enum.
- *
- * \returns active profiler modules.
- */
- static int GetActiveProfilerModules();
-
- /**
- * If logging is performed into a memory buffer (via --logfile=*), allows to
- * retrieve previously written messages. This can be used for retrieving
- * profiler log data in the application. This function is thread-safe.
- *
- * Caller provides a destination buffer that must exist during GetLogLines
- * call. Only whole log lines are copied into the buffer.
- *
- * \param from_pos specified a point in a buffer to read from, 0 is the
- * beginning of a buffer. It is assumed that caller updates its current
- * position using returned size value from the previous call.
- * \param dest_buf destination buffer for log data.
- * \param max_size size of the destination buffer.
- * \returns actual size of log data copied into buffer.
- */
- static int GetLogLines(int from_pos, char* dest_buf, int max_size);
-
- /**
- * The minimum allowed size for a log lines buffer. If the size of
- * the buffer given will not be enough to hold a line of the maximum
- * length, an attempt to find a log line end in GetLogLines will
- * fail, and an empty result will be returned.
- */
- static const int kMinimumSizeForLogLinesBuffer = 2048;
-
- /**
- * Retrieve the V8 thread id of the calling thread.
- *
- * The thread id for a thread should only be retrieved after the V8
- * lock has been acquired with a Locker object with that thread.
- */
- static int GetCurrentThreadId();
-
- /**
- * Forcefully terminate execution of a JavaScript thread. This can
- * be used to terminate long-running scripts.
- *
- * TerminateExecution should only be called when then V8 lock has
- * been acquired with a Locker object. Therefore, in order to be
- * able to terminate long-running threads, preemption must be
- * enabled to allow the user of TerminateExecution to acquire the
- * lock.
- *
- * The termination is achieved by throwing an exception that is
- * uncatchable by JavaScript exception handlers. Termination
- * exceptions act as if they were caught by a C++ TryCatch exception
- * handlers. If forceful termination is used, any C++ TryCatch
- * exception handler that catches an exception should check if that
- * exception is a termination exception and immediately return if
- * that is the case. Returning immediately in that case will
- * continue the propagation of the termination exception if needed.
- *
- * The thread id passed to TerminateExecution must have been
- * obtained by calling GetCurrentThreadId on the thread in question.
- *
- * \param thread_id The thread id of the thread to terminate.
- */
- static void TerminateExecution(int thread_id);
-
- /**
- * Forcefully terminate the current thread of JavaScript execution.
- *
- * This method can be used by any thread even if that thread has not
- * acquired the V8 lock with a Locker object.
- */
- static void TerminateExecution();
-
- /**
- * Is V8 terminating JavaScript execution.
- *
- * Returns true if JavaScript execution is currently terminating
- * because of a call to TerminateExecution. In that case there are
- * still JavaScript frames on the stack and the termination
- * exception is still active.
- */
- static bool IsExecutionTerminating();
-
- /**
- * Releases any resources used by v8 and stops any utility threads
- * that may be running. Note that disposing v8 is permanent, it
- * cannot be reinitialized.
- *
- * It should generally not be necessary to dispose v8 before exiting
- * a process, this should happen automatically. It is only necessary
- * to use if the process needs the resources taken up by v8.
- */
- static bool Dispose();
-
- /**
- * Get statistics about the heap memory usage.
- */
- static void GetHeapStatistics(HeapStatistics* heap_statistics);
-
- /**
- * Optional notification that the embedder is idle.
- * V8 uses the notification to reduce memory footprint.
- * This call can be used repeatedly if the embedder remains idle.
- * Returns true if the embedder should stop calling IdleNotification
- * until real work has been done. This indicates that V8 has done
- * as much cleanup as it will be able to do.
- */
- static bool IdleNotification();
-
- /**
- * Optional notification that the system is running low on memory.
- * V8 uses these notifications to attempt to free memory.
- */
- static void LowMemoryNotification();
-
- /**
- * Optional notification that a context has been disposed. V8 uses
- * these notifications to guide the GC heuristic. Returns the number
- * of context disposals - including this one - since the last time
- * V8 had a chance to clean up.
- */
- static int ContextDisposedNotification();
-
- private:
- V8();
-
- static internal::Object** GlobalizeReference(internal::Object** handle);
- static void DisposeGlobal(internal::Object** global_handle);
- static void MakeWeak(internal::Object** global_handle,
- void* data,
- WeakReferenceCallback);
- static void ClearWeak(internal::Object** global_handle);
- static bool IsGlobalNearDeath(internal::Object** global_handle);
- static bool IsGlobalWeak(internal::Object** global_handle);
-
- template <class T> friend class Handle;
- template <class T> friend class Local;
- template <class T> friend class Persistent;
- friend class Context;
-};
-
-
-/**
- * An external exception handler.
- */
-class V8EXPORT TryCatch {
- public:
-
- /**
- * Creates a new try/catch block and registers it with v8.
- */
- TryCatch();
-
- /**
- * Unregisters and deletes this try/catch block.
- */
- ~TryCatch();
-
- /**
- * Returns true if an exception has been caught by this try/catch block.
- */
- bool HasCaught() const;
-
- /**
- * For certain types of exceptions, it makes no sense to continue
- * execution.
- *
- * Currently, the only type of exception that can be caught by a
- * TryCatch handler and for which it does not make sense to continue
- * is termination exception. Such exceptions are thrown when the
- * TerminateExecution methods are called to terminate a long-running
- * script.
- *
- * If CanContinue returns false, the correct action is to perform
- * any C++ cleanup needed and then return.
- */
- bool CanContinue() const;
-
- /**
- * Throws the exception caught by this TryCatch in a way that avoids
- * it being caught again by this same TryCatch. As with ThrowException
- * it is illegal to execute any JavaScript operations after calling
- * ReThrow; the caller must return immediately to where the exception
- * is caught.
- */
- Handle<Value> ReThrow();
-
- /**
- * Returns the exception caught by this try/catch block. If no exception has
- * been caught an empty handle is returned.
- *
- * The returned handle is valid until this TryCatch block has been destroyed.
- */
- Local<Value> Exception() const;
-
- /**
- * Returns the .stack property of the thrown object. If no .stack
- * property is present an empty handle is returned.
- */
- Local<Value> StackTrace() const;
-
- /**
- * Returns the message associated with this exception. If there is
- * no message associated an empty handle is returned.
- *
- * The returned handle is valid until this TryCatch block has been
- * destroyed.
- */
- Local<v8::Message> Message() const;
-
- /**
- * Clears any exceptions that may have been caught by this try/catch block.
- * After this method has been called, HasCaught() will return false.
- *
- * It is not necessary to clear a try/catch block before using it again; if
- * another exception is thrown the previously caught exception will just be
- * overwritten. However, it is often a good idea since it makes it easier
- * to determine which operation threw a given exception.
- */
- void Reset();
-
- /**
- * Set verbosity of the external exception handler.
- *
- * By default, exceptions that are caught by an external exception
- * handler are not reported. Call SetVerbose with true on an
- * external exception handler to have exceptions caught by the
- * handler reported as if they were not caught.
- */
- void SetVerbose(bool value);
-
- /**
- * Set whether or not this TryCatch should capture a Message object
- * which holds source information about where the exception
- * occurred. True by default.
- */
- void SetCaptureMessage(bool value);
-
- private:
- void* next_;
- void* exception_;
- void* message_;
- bool is_verbose_ : 1;
- bool can_continue_ : 1;
- bool capture_message_ : 1;
- bool rethrow_ : 1;
-
- friend class v8::internal::Top;
-};
-
-
-// --- C o n t e x t ---
-
-
-/**
- * Ignore
- */
-class V8EXPORT ExtensionConfiguration {
- public:
- ExtensionConfiguration(int name_count, const char* names[])
- : name_count_(name_count), names_(names) { }
- private:
- friend class ImplementationUtilities;
- int name_count_;
- const char** names_;
-};
-
-
-/**
- * A sandboxed execution context with its own set of built-in objects
- * and functions.
- */
-class V8EXPORT Context {
- public:
- /** Returns the global object of the context. */
- Local<Object> Global();
-
- /**
- * Detaches the global object from its context before
- * the global object can be reused to create a new context.
- */
- void DetachGlobal();
-
- /**
- * Reattaches a global object to a context. This can be used to
- * restore the connection between a global object and a context
- * after DetachGlobal has been called.
- *
- * \param global_object The global object to reattach to the
- * context. For this to work, the global object must be the global
- * object that was associated with this context before a call to
- * DetachGlobal.
- */
- void ReattachGlobal(Handle<Object> global_object);
-
- /** Creates a new context.
- *
- * Returns a persistent handle to the newly allocated context. This
- * persistent handle has to be disposed when the context is no
- * longer used so the context can be garbage collected.
- */
- static Persistent<Context> New(
- ExtensionConfiguration* extensions = NULL,
- Handle<ObjectTemplate> global_template = Handle<ObjectTemplate>(),
- Handle<Value> global_object = Handle<Value>());
-
- /** Returns the last entered context. */
- static Local<Context> GetEntered();
-
- /** Returns the context that is on the top of the stack. */
- static Local<Context> GetCurrent();
-
- /**
- * Returns the context of the calling JavaScript code. That is the
- * context of the top-most JavaScript frame. If there are no
- * JavaScript frames an empty handle is returned.
- */
- static Local<Context> GetCalling();
-
- /**
- * Sets the security token for the context. To access an object in
- * another context, the security tokens must match.
- */
- void SetSecurityToken(Handle<Value> token);
-
- /** Restores the security token to the default value. */
- void UseDefaultSecurityToken();
-
- /** Returns the security token of this context.*/
- Handle<Value> GetSecurityToken();
-
- /**
- * Enter this context. After entering a context, all code compiled
- * and run is compiled and run in this context. If another context
- * is already entered, this old context is saved so it can be
- * restored when the new context is exited.
- */
- void Enter();
-
- /**
- * Exit this context. Exiting the current context restores the
- * context that was in place when entering the current context.
- */
- void Exit();
-
- /** Returns true if the context has experienced an out of memory situation. */
- bool HasOutOfMemoryException();
-
- /** Returns true if V8 has a current context. */
- static bool InContext();
-
- /**
- * Associate an additional data object with the context. This is mainly used
- * with the debugger to provide additional information on the context through
- * the debugger API.
- */
- void SetData(Handle<String> data);
- Local<Value> GetData();
-
- /**
- * Stack-allocated class which sets the execution context for all
- * operations executed within a local scope.
- */
- class Scope {
- public:
- inline Scope(Handle<Context> context) : context_(context) {
- context_->Enter();
- }
- inline ~Scope() { context_->Exit(); }
- private:
- Handle<Context> context_;
- };
-
- private:
- friend class Value;
- friend class Script;
- friend class Object;
- friend class Function;
-};
-
-
-/**
- * Multiple threads in V8 are allowed, but only one thread at a time
- * is allowed to use V8. The definition of 'using V8' includes
- * accessing handles or holding onto object pointers obtained from V8
- * handles. It is up to the user of V8 to ensure (perhaps with
- * locking) that this constraint is not violated.
- *
- * If you wish to start using V8 in a thread you can do this by constructing
- * a v8::Locker object. After the code using V8 has completed for the
- * current thread you can call the destructor. This can be combined
- * with C++ scope-based construction as follows:
- *
- * \code
- * ...
- * {
- * v8::Locker locker;
- * ...
- * // Code using V8 goes here.
- * ...
- * } // Destructor called here
- * \endcode
- *
- * If you wish to stop using V8 in a thread A you can do this by either
- * by destroying the v8::Locker object as above or by constructing a
- * v8::Unlocker object:
- *
- * \code
- * {
- * v8::Unlocker unlocker;
- * ...
- * // Code not using V8 goes here while V8 can run in another thread.
- * ...
- * } // Destructor called here.
- * \endcode
- *
- * The Unlocker object is intended for use in a long-running callback
- * from V8, where you want to release the V8 lock for other threads to
- * use.
- *
- * The v8::Locker is a recursive lock. That is, you can lock more than
- * once in a given thread. This can be useful if you have code that can
- * be called either from code that holds the lock or from code that does
- * not. The Unlocker is not recursive so you can not have several
- * Unlockers on the stack at once, and you can not use an Unlocker in a
- * thread that is not inside a Locker's scope.
- *
- * An unlocker will unlock several lockers if it has to and reinstate
- * the correct depth of locking on its destruction. eg.:
- *
- * \code
- * // V8 not locked.
- * {
- * v8::Locker locker;
- * // V8 locked.
- * {
- * v8::Locker another_locker;
- * // V8 still locked (2 levels).
- * {
- * v8::Unlocker unlocker;
- * // V8 not locked.
- * }
- * // V8 locked again (2 levels).
- * }
- * // V8 still locked (1 level).
- * }
- * // V8 Now no longer locked.
- * \endcode
- */
-class V8EXPORT Unlocker {
- public:
- Unlocker();
- ~Unlocker();
-};
-
-
-class V8EXPORT Locker {
- public:
- Locker();
- ~Locker();
-
- /**
- * Start preemption.
- *
- * When preemption is started, a timer is fired every n milli seconds
- * that will switch between multiple threads that are in contention
- * for the V8 lock.
- */
- static void StartPreemption(int every_n_ms);
-
- /**
- * Stop preemption.
- */
- static void StopPreemption();
-
- /**
- * Returns whether or not the locker is locked by the current thread.
- */
- static bool IsLocked();
-
- /**
- * Returns whether v8::Locker is being used by this V8 instance.
- */
- static bool IsActive() { return active_; }
-
- private:
- bool has_lock_;
- bool top_level_;
-
- static bool active_;
-
- // Disallow copying and assigning.
- Locker(const Locker&);
- void operator=(const Locker&);
-};
-
-
-/**
- * An interface for exporting data from V8, using "push" model.
- */
-class V8EXPORT OutputStream {
-public:
- enum OutputEncoding {
- kAscii = 0 // 7-bit ASCII.
- };
- enum WriteResult {
- kContinue = 0,
- kAbort = 1
- };
- virtual ~OutputStream() {}
- /** Notify about the end of stream. */
- virtual void EndOfStream() = 0;
- /** Get preferred output chunk size. Called only once. */
- virtual int GetChunkSize() { return 1024; }
- /** Get preferred output encoding. Called only once. */
- virtual OutputEncoding GetOutputEncoding() { return kAscii; }
- /**
- * Writes the next chunk of snapshot data into the stream. Writing
- * can be stopped by returning kAbort as function result. EndOfStream
- * will not be called in case writing was aborted.
- */
- virtual WriteResult WriteAsciiChunk(char* data, int size) = 0;
-};
-
-
-
-// --- I m p l e m e n t a t i o n ---
-
-
-namespace internal {
-
-
-// Tag information for HeapObject.
-const int kHeapObjectTag = 1;
-const int kHeapObjectTagSize = 2;
-const intptr_t kHeapObjectTagMask = (1 << kHeapObjectTagSize) - 1;
-
-// Tag information for Smi.
-const int kSmiTag = 0;
-const int kSmiTagSize = 1;
-const intptr_t kSmiTagMask = (1 << kSmiTagSize) - 1;
-
-template <size_t ptr_size> struct SmiConstants;
-
-// Smi constants for 32-bit systems.
-template <> struct SmiConstants<4> {
- static const int kSmiShiftSize = 0;
- static const int kSmiValueSize = 31;
- static inline int SmiToInt(internal::Object* value) {
- int shift_bits = kSmiTagSize + kSmiShiftSize;
- // Throw away top 32 bits and shift down (requires >> to be sign extending).
- return static_cast<int>(reinterpret_cast<intptr_t>(value)) >> shift_bits;
- }
-};
-
-// Smi constants for 64-bit systems.
-template <> struct SmiConstants<8> {
- static const int kSmiShiftSize = 31;
- static const int kSmiValueSize = 32;
- static inline int SmiToInt(internal::Object* value) {
- int shift_bits = kSmiTagSize + kSmiShiftSize;
- // Shift down and throw away top 32 bits.
- return static_cast<int>(reinterpret_cast<intptr_t>(value) >> shift_bits);
- }
-};
-
-const int kSmiShiftSize = SmiConstants<sizeof(void*)>::kSmiShiftSize;
-const int kSmiValueSize = SmiConstants<sizeof(void*)>::kSmiValueSize;
-
-template <size_t ptr_size> struct InternalConstants;
-
-// Internal constants for 32-bit systems.
-template <> struct InternalConstants<4> {
- static const int kStringResourceOffset = 3 * sizeof(void*);
-};
-
-// Internal constants for 64-bit systems.
-template <> struct InternalConstants<8> {
- static const int kStringResourceOffset = 3 * sizeof(void*);
-};
-
-/**
- * This class exports constants and functionality from within v8 that
- * is necessary to implement inline functions in the v8 api. Don't
- * depend on functions and constants defined here.
- */
-class Internals {
- public:
-
- // These values match non-compiler-dependent values defined within
- // the implementation of v8.
- static const int kHeapObjectMapOffset = 0;
- static const int kMapInstanceTypeOffset = sizeof(void*) + sizeof(int);
- static const int kStringResourceOffset =
- InternalConstants<sizeof(void*)>::kStringResourceOffset;
-
- static const int kProxyProxyOffset = sizeof(void*);
- static const int kJSObjectHeaderSize = 3 * sizeof(void*);
- static const int kFullStringRepresentationMask = 0x07;
- static const int kExternalTwoByteRepresentationTag = 0x02;
-
- static const int kJSObjectType = 0x9f;
- static const int kFirstNonstringType = 0x80;
- static const int kProxyType = 0x85;
-
- static inline bool HasHeapObjectTag(internal::Object* value) {
- return ((reinterpret_cast<intptr_t>(value) & kHeapObjectTagMask) ==
- kHeapObjectTag);
- }
-
- static inline bool HasSmiTag(internal::Object* value) {
- return ((reinterpret_cast<intptr_t>(value) & kSmiTagMask) == kSmiTag);
- }
-
- static inline int SmiValue(internal::Object* value) {
- return SmiConstants<sizeof(void*)>::SmiToInt(value);
- }
-
- static inline int GetInstanceType(internal::Object* obj) {
- typedef internal::Object O;
- O* map = ReadField<O*>(obj, kHeapObjectMapOffset);
- return ReadField<uint8_t>(map, kMapInstanceTypeOffset);
- }
-
- static inline void* GetExternalPointer(internal::Object* obj) {
- if (HasSmiTag(obj)) {
- return obj;
- } else if (GetInstanceType(obj) == kProxyType) {
- return ReadField<void*>(obj, kProxyProxyOffset);
- } else {
- return NULL;
- }
- }
-
- static inline bool IsExternalTwoByteString(int instance_type) {
- int representation = (instance_type & kFullStringRepresentationMask);
- return representation == kExternalTwoByteRepresentationTag;
- }
-
- template <typename T>
- static inline T ReadField(Object* ptr, int offset) {
- uint8_t* addr = reinterpret_cast<uint8_t*>(ptr) + offset - kHeapObjectTag;
- return *reinterpret_cast<T*>(addr);
- }
-
-};
-
-}
-
-
-template <class T>
-Handle<T>::Handle() : val_(0) { }
-
-
-template <class T>
-Local<T>::Local() : Handle<T>() { }
-
-
-template <class T>
-Local<T> Local<T>::New(Handle<T> that) {
- if (that.IsEmpty()) return Local<T>();
- internal::Object** p = reinterpret_cast<internal::Object**>(*that);
- return Local<T>(reinterpret_cast<T*>(HandleScope::CreateHandle(*p)));
-}
-
-
-template <class T>
-Persistent<T> Persistent<T>::New(Handle<T> that) {
- if (that.IsEmpty()) return Persistent<T>();
- internal::Object** p = reinterpret_cast<internal::Object**>(*that);
- return Persistent<T>(reinterpret_cast<T*>(V8::GlobalizeReference(p)));
-}
-
-
-template <class T>
-bool Persistent<T>::IsNearDeath() const {
- if (this->IsEmpty()) return false;
- return V8::IsGlobalNearDeath(reinterpret_cast<internal::Object**>(**this));
-}
-
-
-template <class T>
-bool Persistent<T>::IsWeak() const {
- if (this->IsEmpty()) return false;
- return V8::IsGlobalWeak(reinterpret_cast<internal::Object**>(**this));
-}
-
-
-template <class T>
-void Persistent<T>::Dispose() {
- if (this->IsEmpty()) return;
- V8::DisposeGlobal(reinterpret_cast<internal::Object**>(**this));
-}
-
-
-template <class T>
-Persistent<T>::Persistent() : Handle<T>() { }
-
-template <class T>
-void Persistent<T>::MakeWeak(void* parameters, WeakReferenceCallback callback) {
- V8::MakeWeak(reinterpret_cast<internal::Object**>(**this),
- parameters,
- callback);
-}
-
-template <class T>
-void Persistent<T>::ClearWeak() {
- V8::ClearWeak(reinterpret_cast<internal::Object**>(**this));
-}
-
-
-Arguments::Arguments(v8::Local<v8::Value> data,
- v8::Local<v8::Object> holder,
- v8::Local<v8::Function> callee,
- bool is_construct_call,
- void** values, int length)
- : data_(data), holder_(holder), callee_(callee),
- is_construct_call_(is_construct_call),
- values_(values), length_(length) { }
-
-
-Local<Value> Arguments::operator[](int i) const {
- if (i < 0 || length_ <= i) return Local<Value>(*Undefined());
- return Local<Value>(reinterpret_cast<Value*>(values_ - i));
-}
-
-
-Local<Function> Arguments::Callee() const {
- return callee_;
-}
-
-
-Local<Object> Arguments::This() const {
- return Local<Object>(reinterpret_cast<Object*>(values_ + 1));
-}
-
-
-Local<Object> Arguments::Holder() const {
- return holder_;
-}
-
-
-Local<Value> Arguments::Data() const {
- return data_;
-}
-
-
-bool Arguments::IsConstructCall() const {
- return is_construct_call_;
-}
-
-
-int Arguments::Length() const {
- return length_;
-}
-
-
-template <class T>
-Local<T> HandleScope::Close(Handle<T> value) {
- internal::Object** before = reinterpret_cast<internal::Object**>(*value);
- internal::Object** after = RawClose(before);
- return Local<T>(reinterpret_cast<T*>(after));
-}
-
-Handle<Value> ScriptOrigin::ResourceName() const {
- return resource_name_;
-}
-
-
-Handle<Integer> ScriptOrigin::ResourceLineOffset() const {
- return resource_line_offset_;
-}
-
-
-Handle<Integer> ScriptOrigin::ResourceColumnOffset() const {
- return resource_column_offset_;
-}
-
-
-Handle<Boolean> Boolean::New(bool value) {
- return value ? True() : False();
-}
-
-
-void Template::Set(const char* name, v8::Handle<Data> value) {
- Set(v8::String::New(name), value);
-}
-
-
-Local<Value> Object::GetInternalField(int index) {
-#ifndef V8_ENABLE_CHECKS
- Local<Value> quick_result = UncheckedGetInternalField(index);
- if (!quick_result.IsEmpty()) return quick_result;
-#endif
- return CheckedGetInternalField(index);
-}
-
-
-Local<Value> Object::UncheckedGetInternalField(int index) {
- typedef internal::Object O;
- typedef internal::Internals I;
- O* obj = *reinterpret_cast<O**>(this);
- if (I::GetInstanceType(obj) == I::kJSObjectType) {
- // If the object is a plain JSObject, which is the common case,
- // we know where to find the internal fields and can return the
- // value directly.
- int offset = I::kJSObjectHeaderSize + (sizeof(void*) * index);
- O* value = I::ReadField<O*>(obj, offset);
- O** result = HandleScope::CreateHandle(value);
- return Local<Value>(reinterpret_cast<Value*>(result));
- } else {
- return Local<Value>();
- }
-}
-
-
-void* External::Unwrap(Handle<v8::Value> obj) {
-#ifdef V8_ENABLE_CHECKS
- return FullUnwrap(obj);
-#else
- return QuickUnwrap(obj);
-#endif
-}
-
-
-void* External::QuickUnwrap(Handle<v8::Value> wrapper) {
- typedef internal::Object O;
- O* obj = *reinterpret_cast<O**>(const_cast<v8::Value*>(*wrapper));
- return internal::Internals::GetExternalPointer(obj);
-}
-
-
-void* Object::GetPointerFromInternalField(int index) {
- typedef internal::Object O;
- typedef internal::Internals I;
-
- O* obj = *reinterpret_cast<O**>(this);
-
- if (I::GetInstanceType(obj) == I::kJSObjectType) {
- // If the object is a plain JSObject, which is the common case,
- // we know where to find the internal fields and can return the
- // value directly.
- int offset = I::kJSObjectHeaderSize + (sizeof(void*) * index);
- O* value = I::ReadField<O*>(obj, offset);
- return I::GetExternalPointer(value);
- }
-
- return SlowGetPointerFromInternalField(index);
-}
-
-
-String* String::Cast(v8::Value* value) {
-#ifdef V8_ENABLE_CHECKS
- CheckCast(value);
-#endif
- return static_cast<String*>(value);
-}
-
-
-String::ExternalStringResource* String::GetExternalStringResource() const {
- typedef internal::Object O;
- typedef internal::Internals I;
- O* obj = *reinterpret_cast<O**>(const_cast<String*>(this));
- String::ExternalStringResource* result;
- if (I::IsExternalTwoByteString(I::GetInstanceType(obj))) {
- void* value = I::ReadField<void*>(obj, I::kStringResourceOffset);
- result = reinterpret_cast<String::ExternalStringResource*>(value);
- } else {
- result = NULL;
- }
-#ifdef V8_ENABLE_CHECKS
- VerifyExternalStringResource(result);
-#endif
- return result;
-}
-
-
-bool Value::IsString() const {
-#ifdef V8_ENABLE_CHECKS
- return FullIsString();
-#else
- return QuickIsString();
-#endif
-}
-
-bool Value::QuickIsString() const {
- typedef internal::Object O;
- typedef internal::Internals I;
- O* obj = *reinterpret_cast<O**>(const_cast<Value*>(this));
- if (!I::HasHeapObjectTag(obj)) return false;
- return (I::GetInstanceType(obj) < I::kFirstNonstringType);
-}
-
-
-Number* Number::Cast(v8::Value* value) {
-#ifdef V8_ENABLE_CHECKS
- CheckCast(value);
-#endif
- return static_cast<Number*>(value);
-}
-
-
-Integer* Integer::Cast(v8::Value* value) {
-#ifdef V8_ENABLE_CHECKS
- CheckCast(value);
-#endif
- return static_cast<Integer*>(value);
-}
-
-
-Date* Date::Cast(v8::Value* value) {
-#ifdef V8_ENABLE_CHECKS
- CheckCast(value);
-#endif
- return static_cast<Date*>(value);
-}
-
-
-Object* Object::Cast(v8::Value* value) {
-#ifdef V8_ENABLE_CHECKS
- CheckCast(value);
-#endif
- return static_cast<Object*>(value);
-}
-
-
-Array* Array::Cast(v8::Value* value) {
-#ifdef V8_ENABLE_CHECKS
- CheckCast(value);
-#endif
- return static_cast<Array*>(value);
-}
-
-
-Function* Function::Cast(v8::Value* value) {
-#ifdef V8_ENABLE_CHECKS
- CheckCast(value);
-#endif
- return static_cast<Function*>(value);
-}
-
-
-External* External::Cast(v8::Value* value) {
-#ifdef V8_ENABLE_CHECKS
- CheckCast(value);
-#endif
- return static_cast<External*>(value);
-}
-
-
-Local<Value> AccessorInfo::Data() const {
- return Local<Value>(reinterpret_cast<Value*>(&args_[-2]));
-}
-
-
-Local<Object> AccessorInfo::This() const {
- return Local<Object>(reinterpret_cast<Object*>(&args_[0]));
-}
-
-
-Local<Object> AccessorInfo::Holder() const {
- return Local<Object>(reinterpret_cast<Object*>(&args_[-1]));
-}
-
-
-/**
- * \example shell.cc
- * A simple shell that takes a list of expressions on the
- * command-line and executes them.
- */
-
-
-/**
- * \example process.cc
- */
-
-
-} // namespace v8
-
-
-#undef V8EXPORT
-#undef TYPE_CHECK
-
-
-#endif // V8_H_
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