[win32] Use native aligned memory allocation functions.

src/mesa/main/imports.c

@@ -104,6 +104,8 @@ _mesa_align_malloc(size_t bytes, unsigned long alignment)
 
    (void) posix_memalign(& mem, alignment, bytes);
    return mem;
+#elif defined(_WIN32) && defined(_MSC_VER)
+   return _aligned_malloc(bytes, alignment);
 #else
    uintptr_t ptr, buf;
 
@@ -143,6 +145,15 @@ _mesa_align_calloc(size_t bytes, unsigned long alignment)
       (void) memset(mem, 0, bytes);
    }
 
+   return mem;
+#elif defined(_WIN32) && defined(_MSC_VER)
+   void *mem;
+
+   mem = _aligned_malloc(bytes, alignment);
+   if (mem != NULL) {
+      (void) memset(mem, 0, bytes);
+   }
+
    return mem;
 #else
    uintptr_t ptr, buf;
@@ -180,6 +191,8 @@ _mesa_align_free(void *ptr)
 {
 #if defined(HAVE_POSIX_MEMALIGN)
    free(ptr);
+#elif defined(_WIN32) && defined(_MSC_VER)
+   _aligned_free(ptr);
 #else
    void **cubbyHole = (void **) ((char *) ptr - sizeof(void *));
    void *realAddr = *cubbyHole;
@@ -194,6 +207,10 @@ void *
 _mesa_align_realloc(void *oldBuffer, size_t oldSize, size_t newSize,
                     unsigned long alignment)
 {
+#if defined(_WIN32) && defined(_MSC_VER)
+   (void) oldSize;
+   return _aligned_realloc(oldBuffer, newSize, alignment);
+#else
    const size_t copySize = (oldSize < newSize) ? oldSize : newSize;
    void *newBuf = _mesa_align_malloc(newSize, alignment);
    if (newBuf && oldBuffer && copySize > 0) {
@@ -202,6 +219,7 @@ _mesa_align_realloc(void *oldBuffer, size_t oldSize, size_t newSize,
    if (oldBuffer)
       _mesa_align_free(oldBuffer);
    return newBuf;
+#endif
 }