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#include "stddef.h" // for NULL
#include <errno.h> // for EINVAL, ENOMEM
#include <stdlib.h> // for size_t, aligned_alloc, posix_memalign
int posix_memalign(void **memptr, size_t alignment, size_t size)
{
if (memptr == NULL) {
return EINVAL;
}
*memptr = NULL;
if (alignment < sizeof(void *) || alignment % sizeof(void *) != 0 || (alignment & (alignment - 1)) != 0) {
return EINVAL;
}
if (size == 0) {
*memptr = NULL;
return 0;
}
size_t aligned_size = (size + alignment - 1) & ~(alignment - 1);
void *ptr = aligned_alloc(alignment, aligned_size);
if (ptr == NULL) {
return ENOMEM;
}
*memptr = ptr;
return 0;
}
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