ThreadManager.h

/*
╔══════════════════════════════════════════════════════════════════════════════╗
║                       SIMPLY POWERFUL TOOLKIT (SPTK)                         ║
╟──────────────────────────────────────────────────────────────────────────────╢
║  copyright            © 1999-2022 Alexey Parshin. All rights reserved.       ║
║  email                alexeyp@gmail.com                                      ║
╚══════════════════════════════════════════════════════════════════════════════╝
┌──────────────────────────────────────────────────────────────────────────────┐
│   This library is free software; you can redistribute it and/or modify it    │
│   under the terms of the GNU Library General Public License as published by  │
│   the Free Software Foundation; either version 2 of the License, or (at your │
│   option) any later version.                                                 │
│                                                                              │
│   This library is distributed in the hope that it will be useful, but        │
│   WITHOUT ANY WARRANTY; without even the implied warranty of                 │
│   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library   │
│   General Public License for more details.                                   │
│                                                                              │
│   You should have received a copy of the GNU Library General Public License  │
│   along with this library; if not, write to the Free Software Foundation,    │
│   Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.               │
│                                                                              │
│   Please report all bugs and problems to alexeyp@gmail.com.                  │
└──────────────────────────────────────────────────────────────────────────────┘
*/
 
#pragma once
 
#include <sptk5/threads/SynchronizedQueue.h>
#include <sptk5/threads/Thread.h>
 
namespace sptk {
 
class ThreadManager
{
public:
    explicit ThreadManager(const String& name);
 
    ~ThreadManager();
 
    void start() const;
 
    void stop();
 
    void registerThread(Thread* thread);
 
    void destroyThread(Thread* thread);
 
    size_t threadCount() const;
 
    bool running() const;
 
private:
    class Joiner
        : public Thread
    {
    public:
        explicit Joiner(const String& name);
 
        void push(const SThread& thread);
 
        void stop();
 
    protected:
        void threadFunction() override;
 
        void joinTerminatedThreads(std::chrono::milliseconds timeout);
 
    private:
        SynchronizedQueue<SThread> m_terminatedThreads; 
    };
 
    mutable std::mutex m_mutex;                  
    std::map<Thread*, SThread> m_runningThreads; 
    std::shared_ptr<Joiner> m_joiner;
 
    void terminateRunningThreads();
};
 
using SThreadManager = std::shared_ptr<ThreadManager>;
 
} // namespace sptk