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easy_profiler/profiler_gui/thread_pool.h
Victor Zarubkin c74744fae4 [ui] added workaround for Qt memory leak on Linux when using multiple threads;
[ui] added median duration into tree stats;
[ui] added max rows count for "Call-stack" tree mode;
2019-10-24 19:21:31 +03:00

120 lines
4.7 KiB
C++

/************************************************************************
* file name : thread_pool.h
* ----------------- :
* creation time : 2018/01/28
* author : Victor Zarubkin
* email : v.s.zarubkin@gmail.com
* ----------------- :
* description : The file contains declaration of ThreadPool.
* ----------------- :
* license : Lightweight profiler library for c++
* : Copyright(C) 2016-2019 Sergey Yagovtsev, Victor Zarubkin
* :
* : Licensed under either of
* : * MIT license (LICENSE.MIT or http://opensource.org/licenses/MIT)
* : * Apache License, Version 2.0, (LICENSE.APACHE or http://www.apache.org/licenses/LICENSE-2.0)
* : at your option.
* :
* : The MIT License
* :
* : 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.
* :
* : 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.
************************************************************************/
#ifndef EASY_PROFILER_THREAD_POOL_H
#define EASY_PROFILER_THREAD_POOL_H
#include "thread_pool_task.h"
#include <vector>
#include <deque>
#include <condition_variable>
#include <thread>
#include <functional>
#if !defined(_WIN32) && !defined(__APPLE__)
// FIXME: Workaround for Qt on Linux
//
// There is a memory leak in Qt when creating Qt objects in several separate threads
// and removing them in one another (different) thread.
//
// But there is no memory leak when there is only one separate thread (apart from main thread)
// for creating Qt objects and one separate (different!) thread for removing them.
//
#define EASY_THREADPOOL_SEPARATE_QT_THREAD
#endif
class ThreadPool EASY_FINAL
{
friend ThreadPoolTask;
template <class T>
struct Jobs
{
std::deque<T> queue;
std::mutex mutex;
std::condition_variable cv;
};
using TaskJobs = Jobs<std::reference_wrapper<ThreadPoolTask> >;
using BackgroundJobs = Jobs<std::function<void()> >;
TaskJobs m_tasks;
#ifdef EASY_THREADPOOL_SEPARATE_QT_THREAD
TaskJobs m_qtasks;
#endif
BackgroundJobs m_backgroundJobs;
std::vector<std::thread> m_threads;
std::atomic_bool m_interrupt;
ThreadPool();
public:
~ThreadPool();
static ThreadPool& instance();
void backgroundJob(std::function<void()>&& func);
private:
void enqueue(ThreadPoolTask& task);
void dequeue(ThreadPoolTask& task);
void enqueue(ThreadPoolTask& task, TaskJobs& tasks);
void dequeue(ThreadPoolTask& task, TaskJobs& tasks);
void tasksWorker(TaskJobs& tasks);
void jobsWorker();
}; // end of class ThreadPool.
#endif //EASY_PROFILER_THREAD_POOL_H