39 lines
992 B
C
39 lines
992 B
C
#include <string.h>
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#include <stdlib.h>
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#include "internal.h"
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//#define DEBUG__MEMFILL 0xFF
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static void* system_alloc(HAllocator *allocator, size_t size) {
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void* ptr = malloc(size + sizeof(size_t));
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#ifdef DEBUG__MEMFILL
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memset(ptr, DEBUG__MEMFILL, size + sizeof(size_t));
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#endif
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*(size_t*)ptr = size;
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return ptr + sizeof(size_t);
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}
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static void* system_realloc(HAllocator *allocator, void* ptr, size_t size) {
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if (ptr == NULL)
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return system_alloc(allocator, size);
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ptr = realloc(ptr - sizeof(size_t), size + sizeof(size_t));
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*(size_t*)ptr = size;
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#ifdef DEBUG__MEMFILL
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size_t old_size = *(size_t*)ptr;
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if (size > old_size)
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memset(ptr+sizeof(size_t)+old_size, DEBUG__MEMFILL, size - old_size);
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#endif
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return ptr + sizeof(size_t);
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}
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static void system_free(HAllocator *allocator, void* ptr) {
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if (ptr != NULL)
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free(ptr - sizeof(size_t));
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}
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HAllocator system_allocator = {
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.alloc = system_alloc,
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.realloc = system_realloc,
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.free = system_free,
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};
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