fix posix_memalign according to issue
@@ -128,9 +128,14 @@ size_t malloc_usable_size(void *p) MI_FORWARD1(mi_usable_size,p)
void cfree(void* p) MI_FORWARD0(mi_free, p)
int posix_memalign(void** p, size_t alignment, size_t size) {
- if (alignment % sizeof(void*) != 0) { *p = NULL; return EINVAL; };
- *p = mi_malloc_aligned(size, alignment);
- return (*p == NULL ? ENOMEM : 0);
+ // TODO: the spec says we should return EINVAL also if alignment is not a power of 2.
+ // The spec also dictates we should not modify `*p` on an error. (issue#27)
+ // <http://man7.org/linux/man-pages/man3/posix_memalign.3.html>
+ if (alignment % sizeof(void*) != 0 || p==NULL) return EINVAL;
+ void* q = mi_malloc_aligned(size, alignment);
+ if (q==NULL && size != 0) return ENOMEM;
+ *p = q;
+ return 0;
}
void* memalign(size_t alignment, size_t size) {
