// Copyright 2014 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com

#ifndef _FX_MEMORY
#define _FX_MEMORY
class IFX_MEMAllocator;
class CFX_Target;
enum FX_ALLOCTYPE {
    FX_ALLOCTYPE_Default		=  0,
    FX_ALLOCTYPE_Static				,
    FX_ALLOCTYPE_Fixed				,
    FX_ALLOCTYPE_Dynamic			,
};
class IFX_MEMAllocator
{
public:
    virtual void			Release() = 0;
    virtual void*			Alloc(size_t size) = 0;
    virtual void			Free(void *pBlock) = 0;
    virtual size_t			GetBlockSize() const = 0;
    virtual size_t			GetDefChunkSize() const = 0;
    virtual size_t			SetDefChunkSize(size_t size) = 0;
    virtual size_t			GetCurrentDataSize() const = 0;
};
IFX_MEMAllocator*	FX_CreateAllocator(FX_ALLOCTYPE eType, size_t chunkSize, size_t blockSize);
class CFX_Target
{
public:
    void*	operator new(size_t size)
    {
        return FX_Alloc(uint8_t, size);
    }
    void	operator delete(void *p)
    {
        FX_Free(p);
    }
    void*	operator new(size_t size, IFX_MEMAllocator *pAllocator)
    {
        return pAllocator->Alloc(size);
    }
    void	operator delete(void *p, IFX_MEMAllocator *pAllocator)
    {
        pAllocator->Free(p);
    }
    void*	operator new(size_t size, void *place)
    {
        return place;
    }
    void	operator delete(void *p, void *place)	{}
};
#define FXTARGET_New											new
#define FXTARGET_NewWith(__allocator__)							new(__allocator__)
#define FXTARGET_Delete											delete
#define FXTARGET_DeleteWith(__class__, __allocator__, pointer)	{(pointer)->~__class__(); (pointer)->operator delete((pointer), (__allocator__));}
#endif