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move alignment check from aligned_alloc to posix_memalign

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C11 has no requirement that the alignment be a multiple of
sizeof(void*), and in fact seems to require any "valid alignment
supported by the implementation" to work. since the alignment of char
is 1 and thus a valid alignment, an alignment argument of 1 should be
accepted.
This commit is contained in:
Rich Felker
2013-07-04 23:54:12 -04:00
parent ab72420439
commit 651416182d
2 changed files with 2 additions and 1 deletions
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2
src/malloc/aligned_alloc.c
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@ -11,7 +11,7 @@ void *aligned_alloc(size_t align, size_t len)
unsigned char *mem, *new, *end; unsigned char *mem, *new, *end;
size_t header, footer; size_t header, footer;
if ((align & -align & -sizeof(void *)) != align) { if ((align & -align) != align) {
errno = EINVAL; errno = EINVAL;
return NULL; return NULL;
} }

1
src/malloc/posix_memalign.c
View File

@ -3,6 +3,7 @@
int posix_memalign(void **res, size_t align, size_t len) int posix_memalign(void **res, size_t align, size_t len)
{ {
if (align < sizeof(void *)) return EINVAL;
void *mem = aligned_alloc(align, len); void *mem = aligned_alloc(align, len);
if (!mem) return errno; if (!mem) return errno;
*res = mem; *res = mem;