edlallocator.h

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/*
 * Copyright (C) 2007 Global Graphics Software Ltd. All rights reserved.
 */
 
/*
*  edlallocator.h
*
*  A memory allocator, similar to the STL Allocator.
*
*  Useful for defining who has ownership of memory allocation and deallocation.
*  This is primarily for the windows platform, to handle conflicts between execution and DLL memory spaces.
*
*/
 
#ifndef EDLALLOCATOR_H
#define EDLALLOCATOR_H
 
#include <stdlib.h>
#include <edl/edltypes.h>
#include <edl/edlnamespaces.h>
 
_BEGIN_EDL_NAMESPACE
 
class EDL_API EDLAllocator
{
public:
 
    typedef void *(*AllocatorFn)(size_t n);
    typedef void (*DeallocatorFn)(void *p);
    typedef void *(*ReallocateFn)(void *p, size_t newSize);
 
    EDLAllocator();
 
    virtual ~EDLAllocator()
    {}
 
    EDLAllocator(AllocatorFn allocator, DeallocatorFn deallocator, ReallocateFn reallocator)
    {
        m_allocator = allocator;
        m_deallocator = deallocator;
        m_reallocator = reallocator;
    }
 
    void *allocate(size_t size)                     { return m_allocator(size); }
    void deallocate(void *p)                        { m_deallocator(p); }
    void *reallocate(void *p, size_t newSize)       { return m_reallocator(p, newSize); }
 
private:
 
    AllocatorFn     m_allocator;
    DeallocatorFn   m_deallocator;
    ReallocateFn    m_reallocator;
};
 
 
_END_EDL_NAMESPACE
 
#endif /* EDLALLOCATOR */