godot/thirdparty/oidn/common/barrier.h

53 lines
1.7 KiB
C++
Raw Normal View History

// ======================================================================== //
// Copyright 2009-2019 Intel Corporation //
// //
// 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. //
// ======================================================================== //
#pragma once
#include "platform.h"
#include <mutex>
#include <condition_variable>
namespace oidn {
class Barrier
{
private:
std::mutex m;
std::condition_variable cv;
volatile int count;
public:
Barrier(int count) : count(count) {}
void wait()
{
std::unique_lock<std::mutex> lk(m);
count--;
if (count == 0)
{
lk.unlock();
cv.notify_all();
}
else
{
cv.wait(lk, [&]{ return count == 0; });
}
}
};
} // namespace oidn