137 lines
3.1 KiB
C++
137 lines
3.1 KiB
C++
//------------------------------------------------------------------------------
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// Copyright (c) 2001-2004, OpenBeOS
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the "Software"),
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// to deal in the Software without restriction, including without limitation
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// the rights to use, copy, modify, merge, publish, distribute, sublicense,
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// and/or sell copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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//
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// File Name: AutoDeleter.h
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// Author(s): Ingo Weinhold (bonefish@users.sf.net)
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// Description: Scope-based automatic deletion of objects/arrays.
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// ObjectDeleter - deletes an object
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// ArrayDeleter - deletes an array
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// MemoryDeleter - free()s malloc()ed memory
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//------------------------------------------------------------------------------
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#ifndef _AUTO_DELETER_H
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#define _AUTO_DELETER_H
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#include <stdlib.h>
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namespace BPrivate {
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// AutoDeleter
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template<typename C, typename Delete>
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class AutoDeleter {
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public:
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inline AutoDeleter()
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: fObject(NULL)
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{
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}
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inline AutoDeleter(C *object)
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: fObject(object)
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{
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}
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inline ~AutoDeleter()
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{
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fDelete(fObject);
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}
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inline void SetTo(C *object)
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{
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fDelete(fObject);
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fObject = object;
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}
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inline C *Detach()
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{
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C *object = fObject;
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fObject = NULL;
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return object;
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}
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private:
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C *fObject;
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Delete fDelete;
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};
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// ObjectDeleter
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template<typename C>
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struct ObjectDelete
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{
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inline void operator()(C *object)
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{
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delete object;
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}
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};
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template<typename C>
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struct ObjectDeleter : AutoDeleter<C, ObjectDelete<C> >
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{
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ObjectDeleter() : AutoDeleter<C, ObjectDelete<C> >() {}
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ObjectDeleter(C *object) : AutoDeleter<C, ObjectDelete<C> >(object) {}
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};
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// ArrayDeleter
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template<typename C>
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struct ArrayDelete
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{
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inline void operator()(C *array)
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{
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delete[] array;
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}
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};
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template<typename C>
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struct ArrayDeleter : AutoDeleter<C, ArrayDelete<C> >
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{
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ArrayDeleter() : AutoDeleter<C, ArrayDelete<C> >() {}
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ArrayDeleter(C *array) : AutoDeleter<C, ArrayDelete<C> >(array) {}
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};
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// MemoryDeleter
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struct MemoryDelete
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{
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inline void operator()(void *memory)
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{
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free(memory);
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}
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};
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struct MemoryDeleter : AutoDeleter<void, MemoryDelete >
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{
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MemoryDeleter() : AutoDeleter<void, MemoryDelete >() {}
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MemoryDeleter(void *memory) : AutoDeleter<void, MemoryDelete >(memory) {}
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};
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} // namespace BPrivate
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using BPrivate::ObjectDeleter;
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using BPrivate::ArrayDeleter;
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using BPrivate::MemoryDeleter;
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#endif // _AUTO_DELETER_H
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