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Diffstat (limited to 'absl/synchronization/internal/stdcpp_waiter.h')
-rw-r--r-- | absl/synchronization/internal/stdcpp_waiter.h | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/absl/synchronization/internal/stdcpp_waiter.h b/absl/synchronization/internal/stdcpp_waiter.h new file mode 100644 index 00000000..e592a27b --- /dev/null +++ b/absl/synchronization/internal/stdcpp_waiter.h @@ -0,0 +1,56 @@ +// 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_ |