common/lib/libc/string/explicit_memset.c

   1 /* $NetBSD: explicit_memset.c,v 1.4 2014/06/24 16:39:39 drochner Exp $ */
   2
   3 /*
   4  * Written by Matthias Drochner <drochner@NetBSD.org>.
   5  * Public domain.
   6  */
   7
   8 #if !defined(_KERNEL) && !defined(_STANDALONE)
   9 #include "namespace.h"
  10 #include <string.h>
  11 #ifdef __weak_alias
  12 __weak_alias(explicit_memset,_explicit_memset)
  13 #endif
  14 #define explicit_memset_impl __explicit_memset_impl
  15 #else
  16 #include <lib/libkern/libkern.h>
  17 #endif
  18
  19 /*
  20  * The use of a volatile pointer guarantees that the compiler
  21  * will not optimise the call away.
  22  */
  23 void *(* volatile explicit_memset_impl)(void *, int, size_t) = memset;
  24
  25 void *
  26 explicit_memset(void *b, int c, size_t len)
  27 {
  28
  29         return (*explicit_memset_impl)(b, c, len);
  30 }