#ifndef __CPP_THREAD_H_
#define __CPP_THREAD_H_

/**
 * GNU GENERAL PUBLIC LICENSE
 * Version 3, 29 June 2007
 *
 * (C) 2020-2021, Bernd Porr <mail@bernporr.me.uk>
 **/

#include <thread>

/**
 * A thin wrapper around the C++ thread model to avoid
 * a static callback. Instead just inherit this class
 * and overload run() which then runs in this thread.
 * This is header-only so that it can be performed
 * inline for max performance.
 **/
class CppThread {

public:
	/**
	 * Starts the thread.
	 **/
	inline void start() {
		isRun = true;
		if (mthread) return;
        mthread=new std::thread([this]{this->run();});
	}

	inline void sleep(int time) {
		std::this_thread::sleep_for(std::chrono::milliseconds(time));
	}

	/**
	 * Waits for the thread to terminate.
	 **/
	inline void join() {
		if (nullptr != mthread) {
			mthread->join();
			mthread = nullptr;
		}
	}

	inline void stop() {
		if (!mthread) return;
		delete mthread;
	}

	inline bool isRunning() {
		return this->isRun;
	}

protected:
	/**
	 * This method does all the work of this thread.
         * Overload this abstract function with 
	 * a real one doing the actual work of this thread.
	 **/
	virtual void run() = 0;	

private:
	bool isRun = false;
	// pointer to the thread
	std::thread *mthread=NULL;
};


#endif