92 lines
3.0 KiB
C
92 lines
3.0 KiB
C
/*
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*
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* Copyright 2015 gRPC authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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#ifndef GRPC_IMPL_CODEGEN_ATM_GCC_ATOMIC_H
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#define GRPC_IMPL_CODEGEN_ATM_GCC_ATOMIC_H
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/* atm_platform.h for gcc and gcc-like compilers with the
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__atomic_* interface. */
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#include <grpc/impl/codegen/port_platform.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef intptr_t gpr_atm;
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#define GPR_ATM_MAX INTPTR_MAX
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#define GPR_ATM_MIN INTPTR_MIN
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#ifdef GPR_LOW_LEVEL_COUNTERS
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extern gpr_atm gpr_counter_atm_cas;
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extern gpr_atm gpr_counter_atm_add;
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#define GPR_ATM_INC_COUNTER(counter) \
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__atomic_fetch_add(&counter, 1, __ATOMIC_RELAXED)
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#define GPR_ATM_INC_CAS_THEN(blah) \
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(GPR_ATM_INC_COUNTER(gpr_counter_atm_cas), blah)
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#define GPR_ATM_INC_ADD_THEN(blah) \
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(GPR_ATM_INC_COUNTER(gpr_counter_atm_add), blah)
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#else
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#define GPR_ATM_INC_CAS_THEN(blah) blah
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#define GPR_ATM_INC_ADD_THEN(blah) blah
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#endif
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#define gpr_atm_full_barrier() (__atomic_thread_fence(__ATOMIC_SEQ_CST))
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#define gpr_atm_acq_load(p) (__atomic_load_n((p), __ATOMIC_ACQUIRE))
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#define gpr_atm_no_barrier_load(p) (__atomic_load_n((p), __ATOMIC_RELAXED))
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#define gpr_atm_rel_store(p, value) \
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(__atomic_store_n((p), (intptr_t)(value), __ATOMIC_RELEASE))
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#define gpr_atm_no_barrier_store(p, value) \
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(__atomic_store_n((p), (intptr_t)(value), __ATOMIC_RELAXED))
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#define gpr_atm_no_barrier_fetch_add(p, delta) \
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GPR_ATM_INC_ADD_THEN( \
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__atomic_fetch_add((p), (intptr_t)(delta), __ATOMIC_RELAXED))
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#define gpr_atm_full_fetch_add(p, delta) \
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GPR_ATM_INC_ADD_THEN( \
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__atomic_fetch_add((p), (intptr_t)(delta), __ATOMIC_ACQ_REL))
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static __inline int gpr_atm_no_barrier_cas(gpr_atm* p, gpr_atm o, gpr_atm n) {
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return GPR_ATM_INC_CAS_THEN(__atomic_compare_exchange_n(
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p, &o, n, 0, __ATOMIC_RELAXED, __ATOMIC_RELAXED));
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}
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static __inline int gpr_atm_acq_cas(gpr_atm* p, gpr_atm o, gpr_atm n) {
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return GPR_ATM_INC_CAS_THEN(__atomic_compare_exchange_n(
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p, &o, n, 0, __ATOMIC_ACQUIRE, __ATOMIC_RELAXED));
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}
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static __inline int gpr_atm_rel_cas(gpr_atm* p, gpr_atm o, gpr_atm n) {
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return GPR_ATM_INC_CAS_THEN(__atomic_compare_exchange_n(
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p, &o, n, 0, __ATOMIC_RELEASE, __ATOMIC_RELAXED));
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}
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static __inline int gpr_atm_full_cas(gpr_atm* p, gpr_atm o, gpr_atm n) {
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return GPR_ATM_INC_CAS_THEN(__atomic_compare_exchange_n(
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p, &o, n, 0, __ATOMIC_ACQ_REL, __ATOMIC_RELAXED));
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}
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#define gpr_atm_full_xchg(p, n) \
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GPR_ATM_INC_CAS_THEN(__atomic_exchange_n((p), (n), __ATOMIC_ACQ_REL))
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#ifdef __cplusplus
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}
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#endif
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#endif /* GRPC_IMPL_CODEGEN_ATM_GCC_ATOMIC_H */
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