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