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-rw-r--r-- | js/src/zydis/Zycore/Allocator.h | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/js/src/zydis/Zycore/Allocator.h b/js/src/zydis/Zycore/Allocator.h new file mode 100644 index 0000000000..606d6e4e34 --- /dev/null +++ b/js/src/zydis/Zycore/Allocator.h @@ -0,0 +1,142 @@ +/*************************************************************************************************** + + 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 */ |