88 lines
2.4 KiB
C++
88 lines
2.4 KiB
C++
/*
|
|
* Copyright (c) 2020 Samsung Electronics Co., Ltd. All rights reserved.
|
|
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
|
|
* The above copyright notice and this permission notice shall be included in all
|
|
* copies or substantial portions of the Software.
|
|
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
* SOFTWARE.
|
|
*/
|
|
|
|
#ifndef VTASKQUEUE_H
|
|
#define VTASKQUEUE_H
|
|
|
|
#include <deque>
|
|
|
|
template <typename Task>
|
|
class TaskQueue {
|
|
using lock_t = std::unique_lock<std::mutex>;
|
|
std::deque<Task> _q;
|
|
bool _done{false};
|
|
std::mutex _mutex;
|
|
std::condition_variable _ready;
|
|
|
|
public:
|
|
bool try_pop(Task &task)
|
|
{
|
|
lock_t lock{_mutex, std::try_to_lock};
|
|
if (!lock || _q.empty()) return false;
|
|
task = std::move(_q.front());
|
|
_q.pop_front();
|
|
return true;
|
|
}
|
|
|
|
bool try_push(Task &&task)
|
|
{
|
|
{
|
|
lock_t lock{_mutex, std::try_to_lock};
|
|
if (!lock) return false;
|
|
_q.push_back(std::move(task));
|
|
}
|
|
_ready.notify_one();
|
|
return true;
|
|
}
|
|
|
|
void done()
|
|
{
|
|
{
|
|
lock_t lock{_mutex};
|
|
_done = true;
|
|
}
|
|
_ready.notify_all();
|
|
}
|
|
|
|
bool pop(Task &task)
|
|
{
|
|
lock_t lock{_mutex};
|
|
while (_q.empty() && !_done) _ready.wait(lock);
|
|
if (_q.empty()) return false;
|
|
task = std::move(_q.front());
|
|
_q.pop_front();
|
|
return true;
|
|
}
|
|
|
|
void push(Task &&task)
|
|
{
|
|
{
|
|
lock_t lock{_mutex};
|
|
_q.push_back(std::move(task));
|
|
}
|
|
_ready.notify_one();
|
|
}
|
|
|
|
};
|
|
|
|
#endif // VTASKQUEUE_H
|