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/*
dbx_tree: tree database driver for Miranda IM
Copyright 2007-2010 Michael "Protogenes" Kunz,
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#pragma once
#include "Interface.h"
#include "FileBTree.h"
#include "MREWSync.h"
#include "sigslot.h"
#include "IterationHeap.h"
#include <queue>
#include "lockfree_hashmap.h"
class CSettings;
class CSettingsTree;
#include "Entities.h"
#pragma pack(push, 1) // push current alignment to stack, set alignment to 1 byte boundary
/**
\brief Key Type of the SettingsBTree
The setting names (ASCII) are hashed, so that they can easily be accessed.
**/
typedef struct TSettingKey {
uint32_t Hash; /// 32 bit hash of the Setting name
TDBTSettingHandle Setting;
bool operator < (const TSettingKey & Other) const
{
if (Hash != Other.Hash) return Hash < Other.Hash;
if (Setting != Other.Setting) return Setting < Other.Setting;
return false;
}
//bool operator <= (const TSettingKey & Other);
bool operator == (const TSettingKey & Other) const
{
return (Hash == Other.Hash) && (Setting == Other.Setting);
}
//bool operator >= (const TSettingKey & Other);
bool operator > (const TSettingKey & Other) const
{
if (Hash != Other.Hash) return Hash > Other.Hash;
if (Setting != Other.Setting) return Setting > Other.Setting;
return false;
}
} TSettingKey;
static const uint32_t cSettingSignature = 0xF5B87A3D;
static const uint16_t cSettingNodeSignature = 0xBA12;
/**
\brief The data of a setting
A setting's data is variable length. The data is a TSetting-structure followed by variable length data.
- fixed data
- SettingName (ASCII)
- maybe blob data
**/
typedef struct TSetting {
TDBTEntityHandle Entity; /// Settings' Entity
uint32_t Flags; /// flags
uint16_t Type; /// setting type
uint16_t NameLength; /// settingname length
union {
union {
bool Bool;
int8_t Char; uint8_t Byte;
int16_t Short; uint16_t Word;
uint32_t Int; uint32_t DWord;
int64_t Int64; uint64_t QWord;
float Float;
double Double;
} Value; /// if type is fixed length, the data is stored right here
struct {
uint32_t BlobLength; /// if type is variable length this describes the length of the data in bytes
uint32_t AllocSize; /// this is the allocated space for the blob ALWAYS in byte! this prevents us to realloc it too often
};
};
uint8_t Reserved[8];
// settingname with terminating NULL
// blob
} TSetting;
#pragma pack(pop)
/**
\brief Manages the Settings in the Database
**/
class CSettingsTree : public CFileBTree<TSettingKey, 8>
{
protected:
TDBTEntityHandle m_Entity;
CSettings & m_Owner;
public:
CSettingsTree(CSettings & Owner, CBlockManager & BlockManager, TNodeRef RootNode, TDBTEntityHandle Entity)
: CFileBTree<TSettingKey, 8>(BlockManager, RootNode, cSettingNodeSignature),
m_Owner(Owner),
m_Entity(Entity)
{
};
~CSettingsTree()
{
};
TDBTEntityHandle Entity()
{
return m_Entity;
};
void Entity(TDBTEntityHandle NewEntity)
{
m_Entity = NewEntity;
};
TDBTSettingHandle _FindSetting(const uint32_t Hash, const char * Name, const uint32_t Length);
bool _DeleteSetting(const uint32_t Hash, const TDBTSettingHandle hSetting);
bool _AddSetting(const uint32_t Hash, const TDBTSettingHandle hSetting);
};
/**
\brief Manages all Settings and provides access to them
**/
class CSettings : public sigslot::has_slots<>
{
public:
typedef sigslot::signal2<CSettings*, CSettingsTree::TNodeRef> TOnRootChanged;
static const uint32_t cSettingsFileFlag = 0x00000001;
CSettings(
CBlockManager & BlockManagerSet,
CBlockManager & BlockManagerPri,
CSettingsTree::TNodeRef SettingsRoot,
CEntities & Entities
);
virtual ~CSettings();
TOnRootChanged & sigRootChanged()
{
return m_sigRootChanged;
};
bool _ReadSettingName(CBlockManager & BlockManager, TDBTSettingHandle Setting, uint16_t & NameLength, char *& NameBuf);
void _EnsureModuleExists(char * Module);
// compatibility:
typedef int (*DBMODULEENUMPROC)(const char *szModuleName,DWORD ofsModuleName,LPARAM lParam);
int CompEnumModules(DBMODULEENUMPROC CallBack, LPARAM lParam);
// services:
TDBTSettingHandle FindSetting(TDBTSettingDescriptor & Descriptor);
unsigned int DeleteSetting(TDBTSettingDescriptor & Descriptor);
unsigned int DeleteSetting(TDBTSettingHandle hSetting);
TDBTSettingHandle WriteSetting(TDBTSetting & Setting);
TDBTSettingHandle WriteSetting(TDBTSetting & Setting, TDBTSettingHandle hSetting);
unsigned int ReadSetting(TDBTSetting & Setting);
unsigned int ReadSetting(TDBTSetting & Setting, TDBTSettingHandle hSetting);
TDBTSettingIterationHandle IterationInit(TDBTSettingIterFilter & Filter);
TDBTSettingHandle IterationNext(TDBTSettingIterationHandle Iteration);
unsigned int IterationClose(TDBTSettingIterationHandle Iteration);
private:
typedef lockfree::hash_map<TDBTEntityHandle, CSettingsTree*> TSettingsTreeMap;
typedef CIterationHeap<CSettingsTree::iterator> TSettingsHeap;
CBlockManager & m_BlockManagerSet;
CBlockManager & m_BlockManagerPri;
CEntities & m_Entities;
TSettingsTreeMap m_SettingsMap;
typedef struct TSettingIterationResult {
TDBTSettingHandle Handle;
TDBTEntityHandle Entity;
char * Name;
uint16_t NameLen;
} TSettingIterationResult;
typedef struct TSettingIteration {
TDBTSettingIterFilter Filter;
uint16_t FilterNameStartLength;
TSettingsHeap * Heap;
std::queue<TSettingIterationResult> * Frame;
bool LockSetting;
bool LockPrivate;
} TSettingIteration, *PSettingIteration;
TOnRootChanged m_sigRootChanged;
void onRootChanged(void* SettingsTree, CSettingsTree::TNodeRef NewRoot);
void onDeleteSettingCallback(void * Tree, const TSettingKey & Key, uint32_t Param);
void onDeleteSettings(CEntities * Entities, TDBTEntityHandle hEntity);
void onMergeSettingCallback(void * Tree, const TSettingKey & Key, uint32_t Param);
void onMergeSettings(CEntities * Entities, TDBTEntityHandle Source, TDBTEntityHandle Dest);
CSettingsTree * getSettingsTree(TDBTEntityHandle hEntity);
typedef lockfree::hash_multimap<uint16_t, char *> TModulesMap;
TModulesMap m_Modules;
void _LoadModules();
};
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