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/*
*
* Copyright 2017 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#ifndef GRPC_CORE_LIB_SUPPORT_ATOMIC_WITH_ATM_H
#define GRPC_CORE_LIB_SUPPORT_ATOMIC_WITH_ATM_H
#include <grpc/support/atm.h>
namespace grpc_core {
enum MemoryOrderRelaxed { memory_order_relaxed };
template <class T>
class atomic;
template <>
class atomic<bool> {
public:
atomic() { gpr_atm_no_barrier_store(&x_, static_cast<gpr_atm>(false)); }
explicit atomic(bool x) {
gpr_atm_no_barrier_store(&x_, static_cast<gpr_atm>(x));
}
bool compare_exchange_strong(bool& expected, bool update, MemoryOrderRelaxed,
MemoryOrderRelaxed) {
if (!gpr_atm_no_barrier_cas(&x_, static_cast<gpr_atm>(expected),
static_cast<gpr_atm>(update))) {
expected = gpr_atm_no_barrier_load(&x_) != 0;
return false;
}
return true;
}
private:
gpr_atm x_;
};
} // namespace grpc_core
#endif /* GRPC_CORE_LIB_SUPPORT_ATOMIC_WITH_ATM_H */
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