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atm_gcc_atomic.h
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1 /*
2 *
3 * Copyright 2015, Google Inc.
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7 * modification, are permitted provided that the following conditions are
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11 * notice, this list of conditions and the following disclaimer.
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14 * in the documentation and/or other materials provided with the
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18 * this software without specific prior written permission.
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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 static __inline int gpr_atm_no_barrier_cas(gpr_atm *p, gpr_atm o, gpr_atm n) {
58 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 static __inline int gpr_atm_rel_cas(gpr_atm *p, gpr_atm o, gpr_atm n) {
68 return __atomic_compare_exchange_n(p, &o, n, 0, __ATOMIC_RELEASE,
69 __ATOMIC_RELAXED);
70 }
71
72 #endif /* GRPC_SUPPORT_ATM_GCC_ATOMIC_H */
port_platform.h
gpr_intptr
intptr_t gpr_intptr
Definition: port_platform.h:312
gpr_atm_acq_cas
#define gpr_atm_acq_cas(p, o, n)
Definition: atm_gcc_sync.h:84
gpr_atm_no_barrier_cas
#define gpr_atm_no_barrier_cas(p, o, n)
Definition: atm_gcc_sync.h:83
gpr_atm_rel_cas
#define gpr_atm_rel_cas(p, o, n)
Definition: atm_gcc_sync.h:85
gpr_atm
gpr_intptr gpr_atm
Definition: atm_gcc_atomic.h:41