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/***************************************************************************************************
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 "ZycoreExportConfig.h"
#include "ZycoreStatus.h"
#include "ZycoreTypes.h"
#include <wtf/Compiler.h>
WTF_ALLOW_UNSAFE_BUFFER_USAGE_BEGIN
#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
WTF_ALLOW_UNSAFE_BUFFER_USAGE_END
#endif /* ZYCORE_ALLOCATOR_H */
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