OpenMPI 0.1.1

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atomic.h
1 /*
2 * Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
3 * University Research and Technology
4 * Corporation. All rights reserved.
5 * Copyright (c) 2004-2006 The University of Tennessee and The University
6 * of Tennessee Research Foundation. All rights
7 * reserved.
8 * Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
9 * University of Stuttgart. All rights reserved.
10 * Copyright (c) 2004-2005 The Regents of the University of California.
11 * All rights reserved.
12 * Copyright (c) 2011 Sandia National Laboratories. All rights reserved.
13 * $COPYRIGHT$
14 *
15 * Additional copyrights may follow
16 *
17 * $HEADER$
18 */
19
20 #ifndef OMPI_SYS_ARCH_ATOMIC_H
21 #define OMPI_SYS_ARCH_ATOMIC_H 1
22
23 /**********************************************************************
24 *
25 * Memory Barriers
26 *
27 *********************************************************************/
28 #define OPAL_HAVE_ATOMIC_MEM_BARRIER 1
29
30 static inline void opal_atomic_mb(void)
31 {
32 __sync_synchronize();
33 }
34
35 static inline void opal_atomic_rmb(void)
36 {
37 __sync_synchronize();
38 }
39
40 static inline void opal_atomic_wmb(void)
41 {
42 __sync_synchronize();
43 }
44
45 /**********************************************************************
46 *
47 * Atomic math operations
48 *
49 *********************************************************************/
50
51 #define OPAL_HAVE_ATOMIC_CMPSET_32 1
52 static inline int opal_atomic_cmpset_acq_32( volatile int32_t *addr,
53 int32_t oldval, int32_t newval)
54 {
55 return __sync_bool_compare_and_swap(addr, oldval, newval);
56 }
57
58
59 static inline int opal_atomic_cmpset_rel_32( volatile int32_t *addr,
60 int32_t oldval, int32_t newval)
61 {
62 return __sync_bool_compare_and_swap(addr, oldval, newval);}
63
64 static inline int opal_atomic_cmpset_32( volatile int32_t *addr,
65 int32_t oldval, int32_t newval)
66 {
67 return __sync_bool_compare_and_swap(addr, oldval, newval);
68 }
69
70 #define OPAL_HAVE_ATOMIC_MATH_32 1
71
72 #define OPAL_HAVE_ATOMIC_ADD_32 1
73 static inline int32_t opal_atomic_add_32(volatile int32_t *addr, int32_t delta)
74 {
75 return __sync_fetch_and_add(addr, delta);
76 }
77
78 #define OPAL_HAVE_ATOMIC_SUB_32 1
79 static inline int32_t opal_atomic_sub_32(volatile int32_t *addr, int32_t delta)
80 {
81 return __sync_fetch_and_sub(addr, delta);
82 }
83
84 #define OPAL_HAVE_ATOMIC_CMPSET_64 1
85 static inline int opal_atomic_cmpset_acq_64( volatile int64_t *addr,
86 int64_t oldval, int64_t newval)
87 {
88 return __sync_bool_compare_and_swap(addr, oldval, newval);
89 }
90
91 static inline int opal_atomic_cmpset_rel_64( volatile int64_t *addr,
92 int64_t oldval, int64_t newval)
93 {
94 return __sync_bool_compare_and_swap(addr, oldval, newval);}
95
96
97 static inline int opal_atomic_cmpset_64( volatile int64_t *addr,
98 int64_t oldval, int64_t newval)
99 {
100 return __sync_bool_compare_and_swap(addr, oldval, newval);
101 }
102
103 #define OPAL_HAVE_ATOMIC_MATH_64 1
104 #define OPAL_HAVE_ATOMIC_ADD_64 1
105 static inline int64_t opal_atomic_add_64(volatile int64_t *addr, int64_t delta)
106 {
107 return __sync_fetch_and_add(addr, delta);
108 }
109
110 #define OPAL_HAVE_ATOMIC_SUB_64 1
111 static inline int64_t opal_atomic_sub_64(volatile int64_t *addr, int64_t delta)
112 {
113 return __sync_fetch_and_sub(addr, delta);
114 }
115
116 #endif /* ! OMPI_SYS_ARCH_ATOMIC_H */
opal_atomic_rmb
void opal_atomic_rmb(void)
Read memory barrier.
opal_atomic_mb
void opal_atomic_mb(void)
Memory barrier.
opal_atomic_wmb
void opal_atomic_wmb(void)
Write memory barrier.