Subversion Repositories HelenOS-historic

Rev

Rev 1113 | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
1110 jermar 1
/*
2
 * Copyright (C) 2005 Jakub Jermar
3
 * All rights reserved.
4
 *
5
 * Redistribution and use in source and binary forms, with or without
6
 * modification, are permitted provided that the following conditions
7
 * are met:
8
 *
9
 * - Redistributions of source code must retain the above copyright
10
 *   notice, this list of conditions and the following disclaimer.
11
 * - Redistributions in binary form must reproduce the above copyright
12
 *   notice, this list of conditions and the following disclaimer in the
13
 *   documentation and/or other materials provided with the distribution.
14
 * - The name of the author may not be used to endorse or promote products
15
 *   derived from this software without specific prior written permission.
16
 *
17
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
 */
28
 
1656 cejka 29
 /** @addtogroup libcia64  
30
 * @{
31
 */
32
/** @file
33
 */
34
 
1110 jermar 35
#ifndef __ia64_ATOMIC_H__
36
#define __ia64_ATOMIC_H__
37
 
38
/** Atomic addition.
39
 *
40
 * @param val Atomic value.
41
 * @param imm Value to add.
42
 *
43
 * @return Value before addition.
44
 */
45
static inline long atomic_add(atomic_t *val, int imm)
46
{
47
    long v;
48
 
49
    __asm__ volatile ("fetchadd8.rel %0 = %1, %2\n" : "=r" (v), "+m" (val->count) : "i" (imm));
50
 
51
    return v;
52
}
53
 
54
static inline void atomic_inc(atomic_t *val) { atomic_add(val, 1); }
55
static inline void atomic_dec(atomic_t *val) { atomic_add(val, -1); }
56
 
57
static inline long atomic_preinc(atomic_t *val) { return atomic_add(val, 1) + 1; }
58
static inline long atomic_predec(atomic_t *val) { return atomic_add(val, -1) - 1; }
59
 
60
static inline long atomic_postinc(atomic_t *val) { return atomic_add(val, 1); }
61
static inline long atomic_postdec(atomic_t *val) { return atomic_add(val, -1); }
62
 
63
#endif
1656 cejka 64
 
65
 /** @}
66
 */
67