static void*
memalign_check(size_t alignment, size_t bytes, const void *caller)
{
void* mem;
if (alignment <= MALLOC_ALIGNMENT) return malloc_check(bytes, NULL);
if (alignment < MINSIZE) alignment = MINSIZE;
if (bytes+1 == 0) {
__set_errno (ENOMEM);
return NULL;
}
(void)mutex_lock(&main_arena.mutex);
mem = (top_check() >= 0) ? _int_memalign(&main_arena, alignment, bytes+1) :
NULL;
(void)mutex_unlock(&main_arena.mutex);
return mem2mem_check(mem, bytes);
}
static void *
memalign_check (size_t alignment, size_t bytes, const void *caller)
{
void *mem;
if (alignment <= MALLOC_ALIGNMENT)
return malloc_check (bytes, NULL);
if (alignment < MINSIZE)
alignment = MINSIZE;
/* If the alignment is greater than SIZE_MAX / 2 + 1 it cannot be a
power of 2 and will cause overflow in the check below. */
if (alignment > SIZE_MAX / 2 + 1)
{
__set_errno (EINVAL);
return 0;
}
/* Check for overflow. */
if (bytes > SIZE_MAX - alignment - MINSIZE)
{
__set_errno (ENOMEM);
return 0;
}
/* Make sure alignment is power of 2. */
if (!powerof2 (alignment))
{
size_t a = MALLOC_ALIGNMENT * 2;
while (a < alignment)
a <<= 1;
alignment = a;
}
(void) mutex_lock (&main_arena.mutex);
mem = (top_check () >= 0) ? _int_memalign (&main_arena, alignment, bytes + 1) :
NULL;
(void) mutex_unlock (&main_arena.mutex);
return mem2mem_check (mem, bytes);
}
