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atm_gcc_sync.h
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33 
34 #ifndef GRPC_SUPPORT_ATM_GCC_SYNC_H
35 #define GRPC_SUPPORT_ATM_GCC_SYNC_H
36 
37 /* variant of atm_platform.h for gcc and gcc-like compiers with __sync_*
38  interface */
40 
42 
43 #define GPR_ATM_COMPILE_BARRIER_() __asm__ __volatile__("" : : : "memory")
44 
45 #if defined(__i386) || defined(__x86_64__)
46 /* All loads are acquire loads and all stores are release stores. */
47 #define GPR_ATM_LS_BARRIER_() GPR_ATM_COMPILE_BARRIER_()
48 #else
49 #define GPR_ATM_LS_BARRIER_() gpr_atm_full_barrier()
50 #endif
51 
52 #define gpr_atm_full_barrier() (__sync_synchronize())
53 
54 static __inline gpr_atm gpr_atm_acq_load(const gpr_atm *p) {
55  gpr_atm value = *p;
57  return value;
58 }
59 
60 static __inline gpr_atm gpr_atm_no_barrier_load(const gpr_atm *p) {
61  gpr_atm value = *p;
63  return value;
64 }
65 
66 static __inline void gpr_atm_rel_store(gpr_atm *p, gpr_atm value) {
68  *p = value;
69 }
70 
71 static __inline void gpr_atm_no_barrier_store(gpr_atm *p, gpr_atm value) {
73  *p = value;
74 }
75 
76 #undef GPR_ATM_LS_BARRIER_
77 #undef GPR_ATM_COMPILE_BARRIER_
78 
79 #define gpr_atm_no_barrier_fetch_add(p, delta) \
80  gpr_atm_full_fetch_add((p), (delta))
81 #define gpr_atm_full_fetch_add(p, delta) (__sync_fetch_and_add((p), (delta)))
82 
83 #define gpr_atm_no_barrier_cas(p, o, n) gpr_atm_acq_cas((p), (o), (n))
84 #define gpr_atm_acq_cas(p, o, n) (__sync_bool_compare_and_swap((p), (o), (n)))
85 #define gpr_atm_rel_cas(p, o, n) gpr_atm_acq_cas((p), (o), (n))
86 
87 #endif /* GRPC_SUPPORT_ATM_GCC_SYNC_H */
const char * value
Definition: hpack_table.c:44
intptr_t gpr_intptr
Definition: port_platform.h:315
#define GPR_ATM_LS_BARRIER_()
Definition: atm_gcc_sync.h:49
#define GPR_ATM_COMPILE_BARRIER_()
Definition: atm_gcc_sync.h:43
#define gpr_atm_acq_load(p)
Definition: atm_gcc_atomic.h:45
#define gpr_atm_no_barrier_load(p)
Definition: atm_gcc_atomic.h:46
gpr_intptr gpr_atm
Definition: atm_gcc_sync.h:41
#define gpr_atm_no_barrier_store(p, value)
Definition: atm_gcc_atomic.h:49
#define gpr_atm_rel_store(p, value)
Definition: atm_gcc_atomic.h:47
gpr_intptr gpr_atm
Definition: atm_gcc_atomic.h:41