00001 /* 00002 * Copyright (C) 2005 Jakub Jermar 00003 * All rights reserved. 00004 * 00005 * Redistribution and use in source and binary forms, with or without 00006 * modification, are permitted provided that the following conditions 00007 * are met: 00008 * 00009 * - Redistributions of source code must retain the above copyright 00010 * notice, this list of conditions and the following disclaimer. 00011 * - Redistributions in binary form must reproduce the above copyright 00012 * notice, this list of conditions and the following disclaimer in the 00013 * documentation and/or other materials provided with the distribution. 00014 * - The name of the author may not be used to endorse or promote products 00015 * derived from this software without specific prior written permission. 00016 * 00017 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 00018 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 00019 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 00020 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 00021 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 00022 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 00023 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 00024 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 00025 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 00026 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 00027 */ 00028 00035 #ifndef __ia64_ATOMIC_H__ 00036 #define __ia64_ATOMIC_H__ 00037 00045 static inline long atomic_add(atomic_t *val, int imm) 00046 { 00047 long v; 00048 00049 __asm__ volatile ("fetchadd8.rel %0 = %1, %2\n" : "=r" (v), "+m" (val->count) : "i" (imm)); 00050 00051 return v; 00052 } 00053 00054 static inline void atomic_inc(atomic_t *val) { atomic_add(val, 1); } 00055 static inline void atomic_dec(atomic_t *val) { atomic_add(val, -1); } 00056 00057 static inline long atomic_preinc(atomic_t *val) { return atomic_add(val, 1) + 1; } 00058 static inline long atomic_predec(atomic_t *val) { return atomic_add(val, -1) - 1; } 00059 00060 static inline long atomic_postinc(atomic_t *val) { return atomic_add(val, 1); } 00061 static inline long atomic_postdec(atomic_t *val) { return atomic_add(val, -1); } 00062 00063 #endif 00064