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#include "std_allocator.h"
#include <stdlib.h>
static void *allocate(size_t size, size_t alignment, void *user_data) {
(void)user_data;
// `aligned_alloc(3)` requires that the requested size be a multiple of the requested alignment.
// this is safe to do, because we ignore `old_size` everywhere else.
size_t actual_size = (size + alignment - 1) & ~(alignment - 1);
return aligned_alloc(alignment, actual_size);
}
static void deallocate(void *old_ptr, size_t old_size, void *user_data) {
(void)old_size;
(void)user_data;
free(old_ptr);
}
static void *reallocate(void *old_ptr, size_t old_size, size_t new_size, size_t alignment, void *user_data) {
(void)old_size;
(void)alignment;
(void)user_data;
// fixme: does `realloc(3)` preserve alignment?
return realloc(old_ptr, new_size);
}
SandAllocator sand_new_std_allocator() {
return (SandAllocator) {
.allocate = allocate,
.deallocate = deallocate,
.reallocate = reallocate,
.user_data = NULL,
};
}
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