use mi_is_power_of_two when possible (pr #118)

1 files changed, 1 insertions, 1 deletions

diff --git a/src/alloc-posix.c b/src/alloc-posix.c
index f51aa99..f64cb1f 100644
--- a/src/alloc-posix.c
+++ b/src/alloc-posix.c
@@ -48,7 +48,7 @@ int mi_posix_memalign(void** p, size_t alignment, size_t size) mi_attr_noexcept
   // <http://man7.org/linux/man-pages/man3/posix_memalign.3.html>
   if (p == NULL) return EINVAL;
   if (alignment % sizeof(void*) != 0) return EINVAL;      // natural alignment
-  if ((alignment & (alignment - 1)) != 0) return EINVAL;  // not a power of 2
+  if (!_mi_is_power_of_two(alignment)) return EINVAL;  // not a power of 2
   void* q = mi_malloc_aligned(size, alignment);
   if (q==NULL && size != 0) return ENOMEM;
   *p = q;