chromium/third_party/abseil-cpp/absl/synchronization/internal/futex_waiter.cc

// 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.

#include "absl/synchronization/internal/futex_waiter.h"

#ifdef ABSL_INTERNAL_HAVE_FUTEX_WAITER

#include <atomic>
#include <cstdint>
#include <cerrno>

#include "absl/base/config.h"
#include "absl/base/internal/raw_logging.h"
#include "absl/base/internal/thread_identity.h"
#include "absl/base/optimization.h"
#include "absl/synchronization/internal/kernel_timeout.h"
#include "absl/synchronization/internal/futex.h"

namespace absl {
ABSL_NAMESPACE_BEGIN
namespace synchronization_internal {

#ifdef ABSL_INTERNAL_NEED_REDUNDANT_CONSTEXPR_DECL
constexpr char FutexWaiter::kName[];
#endif

int FutexWaiter::WaitUntil(std::atomic<int32_t>* v, int32_t val,
                           KernelTimeout t) { … }

bool FutexWaiter::Wait(KernelTimeout t) { … }

void FutexWaiter::Post() { … }

void FutexWaiter::Poke() { … }

}  // namespace synchronization_internal
ABSL_NAMESPACE_END
}  // namespace absl

#endif  // ABSL_INTERNAL_HAVE_FUTEX_WAITER