malloc: implement malloc_usable_size().

* Fix #12132
2015-06-13 14:29:11 +02:00
parent 673259506b
commit 0dc6b011fe
2 changed files with 13 additions and 0 deletions
@@ -20,6 +20,10 @@ extern void free(void *pointer);
 extern void *memalign(size_t alignment, size_t numBytes);
 extern void *valloc(size_t numBytes);

+#ifdef _GNU_SOURCE
+size_t malloc_usable_size(void *ptr);
+#endif
+
 #ifdef __cplusplus
 }
 #endif