Line data Source code
1 : /*
2 : *
3 : * Copyright 2015, Google Inc.
4 : * All rights reserved.
5 : *
6 : * Redistribution and use in source and binary forms, with or without
7 : * modification, are permitted provided that the following conditions are
8 : * met:
9 : *
10 : * * Redistributions of source code must retain the above copyright
11 : * notice, this list of conditions and the following disclaimer.
12 : * * Redistributions in binary form must reproduce the above
13 : * copyright notice, this list of conditions and the following disclaimer
14 : * in the documentation and/or other materials provided with the
15 : * distribution.
16 : * * Neither the name of Google Inc. nor the names of its
17 : * contributors may be used to endorse or promote products derived from
18 : * this software without specific prior written permission.
19 : *
20 : * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 : * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 : * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23 : * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
24 : * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25 : * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
26 : * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 : * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 : * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 : * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
30 : * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 : *
32 : */
33 :
34 : #ifndef GRPC_SUPPORT_ATM_GCC_ATOMIC_H
35 : #define GRPC_SUPPORT_ATM_GCC_ATOMIC_H
36 :
37 : /* atm_platform.h for gcc and gcc-like compilers with the
38 : __atomic_* interface. */
39 : #include <grpc/support/port_platform.h>
40 :
41 : typedef gpr_intptr gpr_atm;
42 :
43 : #define gpr_atm_full_barrier() (__atomic_thread_fence(__ATOMIC_SEQ_CST))
44 :
45 : #define gpr_atm_acq_load(p) (__atomic_load_n((p), __ATOMIC_ACQUIRE))
46 : #define gpr_atm_no_barrier_load(p) (__atomic_load_n((p), __ATOMIC_RELAXED))
47 : #define gpr_atm_rel_store(p, value) \
48 : (__atomic_store_n((p), (gpr_intptr)(value), __ATOMIC_RELEASE))
49 : #define gpr_atm_no_barrier_store(p, value) \
50 : (__atomic_store_n((p), (gpr_intptr)(value), __ATOMIC_RELAXED))
51 :
52 : #define gpr_atm_no_barrier_fetch_add(p, delta) \
53 : (__atomic_fetch_add((p), (gpr_intptr)(delta), __ATOMIC_RELAXED))
54 : #define gpr_atm_full_fetch_add(p, delta) \
55 : (__atomic_fetch_add((p), (gpr_intptr)(delta), __ATOMIC_ACQ_REL))
56 :
57 8662032 : static __inline int gpr_atm_no_barrier_cas(gpr_atm *p, gpr_atm o, gpr_atm n) {
58 8662254 : return __atomic_compare_exchange_n(p, &o, n, 0, __ATOMIC_RELAXED,
59 : __ATOMIC_RELAXED);
60 : }
61 :
62 : static __inline int gpr_atm_acq_cas(gpr_atm *p, gpr_atm o, gpr_atm n) {
63 : return __atomic_compare_exchange_n(p, &o, n, 0, __ATOMIC_ACQUIRE,
64 : __ATOMIC_RELAXED);
65 : }
66 :
67 124662730 : static __inline int gpr_atm_rel_cas(gpr_atm *p, gpr_atm o, gpr_atm n) {
68 126006552 : return __atomic_compare_exchange_n(p, &o, n, 0, __ATOMIC_RELEASE,
69 : __ATOMIC_RELAXED);
70 : }
71 :
72 : #endif /* GRPC_SUPPORT_ATM_GCC_ATOMIC_H */
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