char_atomic_load_store.h

一个检测内存泄漏情况的工具

/*
 * Copyright (c) 2003 by Hewlett-Packard Company.  All rights reserved.
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE. 
 */ 

/*
 * Definitions for architecturs on which loads and stores of unsigned char are
 * atomic for all legal alignments.
 */

AO_INLINE unsigned char
AO_char_load(volatile unsigned char *addr)
{
  /* Cast away the volatile for architectures like IA64 where	*/
  /* volatile adds barrier semantics.				*/
  return (*(unsigned char *)addr);
}

#define AO_HAVE_char_load

AO_INLINE void
AO_char_store(volatile unsigned char *addr, unsigned char new_val)
{
  (*(unsigned char *)addr) = new_val;
}

#define AO_HAVE_char_store