125 lines
2.2 KiB
C++
125 lines
2.2 KiB
C++
// Copyright (C) 2002-2012 Nikolaus Gebhardt
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// This file is part of the "Irrlicht Engine" and the "irrXML" project.
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// For conditions of distribution and use, see copyright notice in irrlicht.h and irrXML.h
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#ifndef __IRR_ALLOCATOR_H_INCLUDED__
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#define __IRR_ALLOCATOR_H_INCLUDED__
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#include "irrTypes.h"
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#include <new>
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// necessary for older compilers
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#include <memory.h>
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namespace irr
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{
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namespace core
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{
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#ifdef DEBUG_CLIENTBLOCK
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#undef DEBUG_CLIENTBLOCK
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#define DEBUG_CLIENTBLOCK new
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#endif
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//! Very simple allocator implementation, containers using it can be used across dll boundaries
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template<typename T>
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class irrAllocator
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{
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public:
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//! Destructor
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virtual ~irrAllocator() {}
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//! Allocate memory for an array of objects
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T* allocate(size_t cnt)
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{
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return (T*)internal_new(cnt* sizeof(T));
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}
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//! Deallocate memory for an array of objects
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void deallocate(T* ptr)
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{
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internal_delete(ptr);
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}
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//! Construct an element
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void construct(T* ptr, const T&e)
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{
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new ((void*)ptr) T(e);
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}
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//! Destruct an element
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void destruct(T* ptr)
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{
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ptr->~T();
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}
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protected:
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virtual void* internal_new(size_t cnt)
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{
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return operator new(cnt);
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}
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virtual void internal_delete(void* ptr)
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{
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operator delete(ptr);
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}
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};
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//! Fast allocator, only to be used in containers inside the same memory heap.
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/** Containers using it are NOT able to be used it across dll boundaries. Use this
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when using in an internal class or function or when compiled into a static lib */
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template<typename T>
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class irrAllocatorFast
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{
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public:
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//! Allocate memory for an array of objects
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T* allocate(size_t cnt)
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{
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return (T*)operator new(cnt* sizeof(T));
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}
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//! Deallocate memory for an array of objects
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void deallocate(T* ptr)
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{
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operator delete(ptr);
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}
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//! Construct an element
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void construct(T* ptr, const T&e)
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{
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new ((void*)ptr) T(e);
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}
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//! Destruct an element
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void destruct(T* ptr)
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{
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ptr->~T();
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}
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};
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#ifdef DEBUG_CLIENTBLOCK
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#undef DEBUG_CLIENTBLOCK
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#define DEBUG_CLIENTBLOCK new( _CLIENT_BLOCK, __FILE__, __LINE__)
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#endif
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//! defines an allocation strategy
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enum eAllocStrategy
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{
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ALLOC_STRATEGY_SAFE = 0,
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ALLOC_STRATEGY_DOUBLE = 1,
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ALLOC_STRATEGY_SQRT = 2
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};
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} // end namespace core
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} // end namespace irr
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#endif
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