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/***************************************************************************
libkwave/WorkerThread.h - worker thread for Kwave
-------------------
begin : Sun Apr 06 2008
copyright : (C) 2008 by Thomas Eschenbacher
email : Thomas.Eschenbacher@gmx.de
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#ifndef WORKER_THREAD_H
#define WORKER_THREAD_H
#include "config.h"
#include "libkwave_export.h"
#include <pthread.h>
#include <QtGlobal>
#include <QMutex>
#include <QObject>
#include <QThread>
#include <QVariant>
namespace Kwave
{
class Runnable;
class LIBKWAVE_EXPORT WorkerThread: public QThread
{
Q_OBJECT
public:
/** Constructor */
explicit WorkerThread(Kwave::Runnable *runnable, QVariant params);
/** Destructor, calls stop() if the thread is still running. */
virtual ~WorkerThread() override;
/**
* Stops the thread execution. Please note that you <b>MUST</b> call
* this function at the end if you derived a class from this one.
* @param timeout the timeout in milliseconds, default = 10s
* @return zero if successful or an error code if failed
* @see errno.h
*/
virtual int stop(unsigned int timeout = 10000);
/**
* A wrapper for the run() function, calls the run_wrapper(...)
* of m_runnable with the parameters passed in the constructor.
*/
void run() override;
public slots:
/**
* Can be connected to a progress dialog to cancel the current
* operation.
*/
virtual void cancel();
signals:
/**
* emitted when cancel() is called, can be connected
* to the cancel() slot of child objects
*/
void sigCancel();
private:
/** pointer to the object that has a run() function */
Kwave::Runnable *m_runnable;
/** parameter pointer passed to the run() function */
QVariant m_params;
/** Mutex to control access to the thread itself */
QMutex m_lock;
/** Mutex for protecting SIGHUP <-> thread exit */
QMutex m_lock_sighup;
/**
* POSIX compatible thread ID of the worker thread.
* only needed and only valid while the thread is running.
* (needs a POSIX 1003.1-2001 system libc)
*/
pthread_t m_tid;
/** POSIX compatible thread ID of the owner thread. */
pthread_t m_owner_tid;
};
}
#endif /* WORKER_THREAD_H */
//***************************************************************************
//***************************************************************************
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