Abseil Common Libraries (C++) (grcp 依赖)
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76 lines
2.3 KiB
76 lines
2.3 KiB
// Copyright 2017 The Abseil 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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// https://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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#include "absl/synchronization/notification.h" |
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#include <atomic> |
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#include "absl/base/attributes.h" |
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#include "absl/base/internal/raw_logging.h" |
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#include "absl/synchronization/mutex.h" |
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#include "absl/time/time.h" |
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namespace absl { |
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void Notification::Notify() { |
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MutexLock l(&this->mutex_); |
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#ifndef NDEBUG |
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if (ABSL_PREDICT_FALSE(notified_yet_.load(std::memory_order_relaxed))) { |
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ABSL_RAW_LOG( |
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FATAL, |
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"Notify() method called more than once for Notification object %p", |
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static_cast<void *>(this)); |
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} |
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#endif |
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notified_yet_.store(true, std::memory_order_release); |
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} |
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Notification::~Notification() { |
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// Make sure that the thread running Notify() exits before the object is |
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// destructed. |
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MutexLock l(&this->mutex_); |
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} |
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void Notification::WaitForNotification() const { |
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if (!HasBeenNotifiedInternal(&this->notified_yet_)) { |
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this->mutex_.LockWhen(Condition(&HasBeenNotifiedInternal, |
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&this->notified_yet_)); |
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this->mutex_.Unlock(); |
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} |
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} |
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bool Notification::WaitForNotificationWithTimeout( |
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absl::Duration timeout) const { |
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bool notified = HasBeenNotifiedInternal(&this->notified_yet_); |
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if (!notified) { |
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notified = this->mutex_.LockWhenWithTimeout( |
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Condition(&HasBeenNotifiedInternal, &this->notified_yet_), timeout); |
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this->mutex_.Unlock(); |
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} |
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return notified; |
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} |
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bool Notification::WaitForNotificationWithDeadline(absl::Time deadline) const { |
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bool notified = HasBeenNotifiedInternal(&this->notified_yet_); |
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if (!notified) { |
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notified = this->mutex_.LockWhenWithDeadline( |
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Condition(&HasBeenNotifiedInternal, &this->notified_yet_), deadline); |
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this->mutex_.Unlock(); |
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} |
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return notified; |
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} |
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} // namespace absl
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