/***************************************************************************************************
Zyan Core Library ( Zycore - C )
Original Author : Florian Bernd
* Permission is hereby granted , free of charge , to any person obtaining a copy
* of this software and associated documentation files ( the " Software " ) , to deal
* in the Software without restriction , including without limitation the rights
* to use , copy , modify , merge , publish , distribute , sublicense , and / or sell
* copies of the Software , and to permit persons to whom the Software is
* furnished to do so , subject to the following conditions :
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software .
*
* THE SOFTWARE IS PROVIDED " AS IS " , WITHOUT WARRANTY OF ANY KIND , EXPRESS OR
* IMPLIED , INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY ,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT . IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM , DAMAGES OR OTHER
* LIABILITY , WHETHER IN AN ACTION OF CONTRACT , TORT OR OTHERWISE , ARISING FROM ,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE .
***************************************************************************************************/
/**
* @ file
* @ brief
*/
#ifndef ZYCORE_ALLOCATOR_H
#define ZYCORE_ALLOCATOR_H
#include "zydis/Zycore/Status.h"
#include "zydis/Zycore/Types.h"
#ifdef __cplusplus
extern "C" {
#endif
/* ============================================================================================== */
/* Enums and types */
/* ============================================================================================== */
struct ZyanAllocator_;
/**
* Defines the ` ZyanAllocatorAllocate ` function prototype .
*
* @ param allocator A pointer to the ` ZyanAllocator ` instance .
* @ param p Receives a pointer to the first memory block sufficient to hold an
* array of ` n ` elements with a size of ` element_size ` .
* @ param element_size The size of a single element .
* @ param n The number of elements to allocate storage for .
*
* @ return A zyan status code .
*
* This prototype is used for the ` allocate ( ) ` and ` reallocate ( ) ` functions .
*
* The result of the ` reallocate ( ) ` function is undefined , if ` p ` does not point to a memory block
* previously obtained by ` ( re - ) allocate ( ) ` .
*/
typedef ZyanStatus (*ZyanAllocatorAllocate)(struct ZyanAllocator_* allocator, void ** p,
ZyanUSize element_size, ZyanUSize n);
/**
* Defines the ` ZyanAllocatorDeallocate ` function prototype .
*
* @ param allocator A pointer to the ` ZyanAllocator ` instance .
* @ param p The pointer obtained from ` ( re - ) allocate ( ) ` .
* @ param element_size The size of a single element .
* @ param n The number of elements earlier passed to ` ( re - ) allocate ( ) ` .
*
* @ return A zyan status code .
*/
typedef ZyanStatus (*ZyanAllocatorDeallocate)(struct ZyanAllocator_* allocator, void * p,
ZyanUSize element_size, ZyanUSize n);
/**
* Defines the ` ZyanAllocator ` struct .
*
* This is the base class for all custom allocator implementations .
*
* All fields in this struct should be considered as " private " . Any changes may lead to unexpected
* behavior .
*/
typedef struct ZyanAllocator_
{
/**
* The allocate function .
*/
ZyanAllocatorAllocate allocate;
/**
* The reallocate function .
*/
ZyanAllocatorAllocate reallocate;
/**
* The deallocate function .
*/
ZyanAllocatorDeallocate deallocate;
} ZyanAllocator;
/* ============================================================================================== */
/* Exported functions */
/* ============================================================================================== */
/**
* Initializes the given ` ZyanAllocator ` instance .
*
* @ param allocator A pointer to the ` ZyanAllocator ` instance .
* @ param allocate The allocate function .
* @ param reallocate The reallocate function .
* @ param deallocate The deallocate function .
*
* @ return A zyan status code .
*/
ZYCORE_EXPORT ZyanStatus ZyanAllocatorInit(ZyanAllocator* allocator, ZyanAllocatorAllocate allocate,
ZyanAllocatorAllocate reallocate, ZyanAllocatorDeallocate deallocate);
#ifndef ZYAN_NO_LIBC
/**
* Returns the default ` ZyanAllocator ` instance .
*
* @ return A pointer to the default ` ZyanAllocator ` instance .
*
* The default allocator uses the default memory manager to allocate memory on the heap .
*
* You should in no case modify the returned allocator instance to avoid unexpected behavior .
*/
ZYCORE_EXPORT ZYAN_REQUIRES_LIBC ZyanAllocator* ZyanAllocatorDefault(void );
#endif // ZYAN_NO_LIBC
/* ============================================================================================== */
#ifdef __cplusplus
}
#endif
#endif /* ZYCORE_ALLOCATOR_H */
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