Merge branch 'dev' into dev2

src/os.c

@@ -497,6 +497,17 @@ bool _mi_os_reset(void* addr, size_t size) {
 }
 
 
+void _mi_os_reuse( void* addr, size_t size ) {
+  // page align conservatively within the range
+  size_t csize = 0;
+  void* const start = mi_os_page_align_area_conservative(addr, size, &csize);
+  if (csize == 0) return;
+  const int err = _mi_prim_reuse(start, csize);
+  if (err != 0) {
+    _mi_warning_message("cannot reuse OS memory (error: %d (0x%x), address: %p, size: 0x%zx bytes)\n", err, err, start, csize);
+  }
+}
+
 // either resets or decommits memory, returns true if the memory needs
 // to be recommitted if it is to be re-used later on.
 bool _mi_os_purge_ex(void* p, size_t size, bool allow_reset, size_t stat_size)