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// Copyright 2023 The Abseil 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
//
// https://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 ABSL_SYNCHRONIZATION_INTERNAL_STDCPP_WAITER_H_
#define ABSL_SYNCHRONIZATION_INTERNAL_STDCPP_WAITER_H_
#include <condition_variable> // NOLINT(build/c++11)
#include <mutex> // NOLINT(build/c++11)
#include "absl/base/config.h"
#include "absl/synchronization/internal/kernel_timeout.h"
#include "absl/synchronization/internal/waiter_base.h"
namespace absl {
ABSL_NAMESPACE_BEGIN
namespace synchronization_internal {
#define ABSL_INTERNAL_HAVE_STDCPP_WAITER 1
class StdcppWaiter : public WaiterCrtp<StdcppWaiter> {
public:
StdcppWaiter();
bool Wait(KernelTimeout t);
void Post();
void Poke();
static constexpr char kName[] = "StdcppWaiter";
private:
// REQUIRES: mu_ must be held.
void InternalCondVarPoke();
std::mutex mu_;
std::condition_variable cv_;
int waiter_count_;
int wakeup_count_; // Unclaimed wakeups.
};
} // namespace synchronization_internal
ABSL_NAMESPACE_END
} // namespace absl
#endif // ABSL_SYNCHRONIZATION_INTERNAL_STDCPP_WAITER_H_
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