50 lines
1.5 KiB
C++
50 lines
1.5 KiB
C++
// Copyright 2010-2017 Google
|
|
// 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.
|
|
|
|
#include "ortools/base/notification.h"
|
|
|
|
#include <atomic>
|
|
#include <condition_variable> // NOLINT
|
|
#include <mutex> // NOLINT
|
|
|
|
namespace absl {
|
|
void Notification::Notify() {
|
|
std::unique_lock<std::mutex> mutex_lock(mutex_);
|
|
notified_yet_.store(true, std::memory_order_release);
|
|
condition_.notify_all();
|
|
}
|
|
|
|
Notification::~Notification() {
|
|
// Make sure that the thread running Notify() exits before the object is
|
|
// destructed.
|
|
std::unique_lock<std::mutex> mutex_lock(mutex_);
|
|
}
|
|
|
|
static inline bool HasBeenNotifiedInternal(
|
|
const std::atomic<bool> *notified_yet) {
|
|
return notified_yet->load(std::memory_order_acquire);
|
|
}
|
|
|
|
bool Notification::HasBeenNotified() const {
|
|
return HasBeenNotifiedInternal(&this->notified_yet_);
|
|
}
|
|
|
|
void Notification::WaitForNotification() {
|
|
if (!HasBeenNotifiedInternal(&this->notified_yet_)) {
|
|
std::unique_lock<std::mutex> mutex_lock(mutex_);
|
|
condition_.wait(mutex_lock);
|
|
}
|
|
}
|
|
|
|
} // namespace absl
|