MemoryAllocator.h

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/*
 *  Copyright 2019-2021 Diligent Graphics LLC
 *  Copyright 2015-2019 Egor Yusov
 *  
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *  
 *      http://www.apache.org/licenses/LICENSE-2.0
 *  
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 *  In no event and under no legal theory, whether in tort (including negligence), 
 *  contract, or otherwise, unless required by applicable law (such as deliberate 
 *  and grossly negligent acts) or agreed to in writing, shall any Contributor be
 *  liable for any damages, including any direct, indirect, special, incidental, 
 *  or consequential damages of any character arising as a result of this License or 
 *  out of the use or inability to use the software (including but not limited to damages 
 *  for loss of goodwill, work stoppage, computer failure or malfunction, or any and 
 *  all other commercial damages or losses), even if such Contributor has been advised 
 *  of the possibility of such damages.
 */
 
#pragma once
 
 
#include "BasicTypes.h"
 
DILIGENT_BEGIN_NAMESPACE(Diligent)
 
 
#if DILIGENT_CPP_INTERFACE
 
struct IMemoryAllocator
{
    virtual void* Allocate(size_t Size, const Char* dbgDescription, const char* dbgFileName, const Int32 dbgLineNumber) = 0;
 
    virtual void Free(void* Ptr) = 0;
};
 
#else
 
struct IMemoryAllocator;
 
// clang-format off
 
struct IMemoryAllocatorMethods
{
    void* (*Allocate) (struct IMemoryAllocator*, size_t Size, const Char* dbgDescription, const char* dbgFileName, const Int32 dbgLineNumber);
    void  (*Free)     (struct IMemoryAllocator*, void* Ptr);
};
 
struct IMemoryAllocatorVtbl
{
    struct IMemoryAllocatorMethods MemoryAllocator;
};
 
// clang-format on
 
typedef struct IMemoryAllocator
{
    struct IMemoryAllocatorVtbl* pVtbl;
} IMemoryAllocator;
 
// clang-format off
 
#    define IMemoryAllocator_Allocate(This, ...) CALL_IFACE_METHOD(MemoryAllocator, Allocate, This, __VA_ARGS__)
#    define IMemoryAllocator_Free(This, ...)     CALL_IFACE_METHOD(MemoryAllocator, Free,     This, __VA_ARGS__)
 
#endif
 
DILIGENT_END_NAMESPACE // namespace Diligent