diff options
author | Craig Tiller <ctiller@google.com> | 2017-03-20 06:45:39 -0700 |
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committer | Craig Tiller <ctiller@google.com> | 2017-03-20 06:45:39 -0700 |
commit | d2164409343445e1f2de62b210218ad05c75d4c9 (patch) | |
tree | acbf415c7719a7830b42b95634acb1d3ed3e9597 /include/grpc/impl/codegen | |
parent | ca3154d7c8edadcd84e1e199264c30a7f285058e (diff) |
Switch to no-barrier loads + full barrier cas-s to solve ABA problem
Diffstat (limited to 'include/grpc/impl/codegen')
-rw-r--r-- | include/grpc/impl/codegen/atm_gcc_atomic.h | 5 | ||||
-rw-r--r-- | include/grpc/impl/codegen/atm_gcc_sync.h | 1 |
2 files changed, 6 insertions, 0 deletions
diff --git a/include/grpc/impl/codegen/atm_gcc_atomic.h b/include/grpc/impl/codegen/atm_gcc_atomic.h index 4bd3b25741..a486258c77 100644 --- a/include/grpc/impl/codegen/atm_gcc_atomic.h +++ b/include/grpc/impl/codegen/atm_gcc_atomic.h @@ -85,6 +85,11 @@ static __inline int gpr_atm_rel_cas(gpr_atm *p, gpr_atm o, gpr_atm n) { p, &o, n, 0, __ATOMIC_RELEASE, __ATOMIC_RELAXED)); } +static __inline int gpr_atm_full_cas(gpr_atm *p, gpr_atm o, gpr_atm n) { + return GPR_ATM_INC_CAS_THEN(__atomic_compare_exchange_n( + p, &o, n, 0, __ATOMIC_ACQ_REL, __ATOMIC_RELAXED)); +} + #define gpr_atm_full_xchg(p, n) \ GPR_ATM_INC_CAS_THEN(__atomic_exchange_n((p), (n), __ATOMIC_ACQ_REL)) diff --git a/include/grpc/impl/codegen/atm_gcc_sync.h b/include/grpc/impl/codegen/atm_gcc_sync.h index 9aa2b43189..946545a671 100644 --- a/include/grpc/impl/codegen/atm_gcc_sync.h +++ b/include/grpc/impl/codegen/atm_gcc_sync.h @@ -83,6 +83,7 @@ static __inline void gpr_atm_no_barrier_store(gpr_atm *p, gpr_atm value) { #define gpr_atm_no_barrier_cas(p, o, n) gpr_atm_acq_cas((p), (o), (n)) #define gpr_atm_acq_cas(p, o, n) (__sync_bool_compare_and_swap((p), (o), (n))) #define gpr_atm_rel_cas(p, o, n) gpr_atm_acq_cas((p), (o), (n)) +#define gpr_atm_full_cas(p, o, n) gpr_atm_acq_cas((p), (o), (n)) static __inline gpr_atm gpr_atm_full_xchg(gpr_atm *p, gpr_atm n) { gpr_atm cur; |