1 files changed, 106 insertions, 0 deletions
diff --git a/utils/scope.h b/utils/scope.h
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+++ b/utils/scope.h
@@ -0,0 +1,106 @@
+/*
+Copyright (C) 2009 Ricardo Pescuma Domenecci
+
+This is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public
+License as published by the Free Software Foundation; either
+version 2 of the License, or (at your option) any later version.
+
+This 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with this file; see the file license.txt.  If
+not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  
+*/
+
+
+#ifndef __SCOPE_H__
+# define __SCOPE_H__
+
+
+#define DEFINE_SCOPED_TYPE(_NAME_, _DELETE_)			\
+	template<class T>									\
+	class _NAME_										\
+	{													\
+		_NAME_(_NAME_ &);								\
+		_NAME_ & operator=(_NAME_ &);					\
+														\
+	public:												\
+		_NAME_(T *t = NULL) : p(t) {}					\
+														\
+		~_NAME_() 										\
+		{ 												\
+			release(); 									\
+		}												\
+														\
+		T * operator=(T *t) 							\
+		{ 												\
+			release(); 									\
+			p = t; 										\
+			return t;									\
+		}												\
+														\
+		operator T*() const 							\
+		{ 												\
+			return p; 									\
+		}												\
+														\
+		bool operator==(T *t) const 					\
+		{ 												\
+			return p == t;								\
+		}												\
+														\
+		bool operator!=(T *t) const 					\
+		{ 												\
+			return p != t;								\
+		}												\
+														\
+		T *get() const 									\
+		{												\
+			return p;									\
+		}												\
+														\
+		void release()									\
+		{												\
+			if (p != NULL)								\
+				dealoc(p);								\
+			p = NULL;									\
+		}												\
+														\
+		T* detach() 									\
+		{ 												\
+			T *ret = p;									\
+			p = NULL;									\
+			return ret;									\
+		}												\
+														\
+	protected:											\
+		T *p;											\
+														\
+		void dealoc(T *ptr)								\
+		{												\
+			_DELETE_;									\
+		}												\
+	};													\
+														\
+	template<typename T> 								\
+	inline bool operator==(T* p, const _NAME_<T> &b) {	\
+	  return p == b.get();								\
+	}													\
+														\
+	template<typename T> 								\
+	inline bool operator!=(T* p, const _NAME_<T> &b) {	\
+	  return p != b.get();								\
+	}
+
+DEFINE_SCOPED_TYPE(scoped_ptr, delete ptr)
+DEFINE_SCOPED_TYPE(scoped_array, delete[] ptr)
+DEFINE_SCOPED_TYPE(scoped_free, free(ptr))
+DEFINE_SCOPED_TYPE(scoped_mir_free, mir_free(ptr))
+
+
+#endif // __SCOPE_H__