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/* This file is part of the KDE project
Copyright (C) 2002 Simon Hausmann <hausmann@kde.org>
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; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
#ifndef THREADUTIL_H
#define THREADUTIL_H
#include <qvaluelist.h>
#include <qobject.h>
#include <qguardedptr.h>
class QSocketNotifier;
namespace ThreadUtil
{
class Mutex
{
friend class WaitCondition;
public:
Mutex();
~Mutex();
void lock();
void unlock();
bool tryLock();
bool isLocked();
private:
struct Data;
Data *d;
Mutex( const Mutex & );
Mutex &operator=( const Mutex & );
};
class AutoLock
{
public:
AutoLock( Mutex &mutex ) : m_mutex( mutex ) { m_mutex.lock(); }
~AutoLock() { m_mutex.unlock(); }
Mutex *operator &() const { return &m_mutex; }
private:
Mutex &m_mutex;
};
class WaitCondition
{
public:
WaitCondition();
~WaitCondition();
bool wait();
bool wait( Mutex &mutex );
void wakeOne();
void wakeAll();
private:
struct Data;
Data *d;
WaitCondition( const WaitCondition & );
WaitCondition &operator=( const WaitCondition & );
};
class Thread
{
public:
struct Data;
friend struct Data;
Thread();
virtual ~Thread();
void start();
void terminate();
bool wait();
bool isRunning() const;
static void exit();
protected:
virtual void run() = 0;
private:
Data *d;
};
class OnewayNotifier : public QObject
{
Q_OBJECT
public:
OnewayNotifier();
~OnewayNotifier();
void notify();
signals:
void awake();
private slots:
void wakeUp();
private:
int m_readFd;
int m_writeFd;
QSocketNotifier *m_notifier;
};
class Channel;
class ChannelMessage
{
friend class Channel;
public:
ChannelMessage( int type = -1, int data = -1, const char* msg = 0 );
virtual ~ChannelMessage();
int type() const { return m_type; }
int data() const { return m_data; }
const char* msg()const { return m_msg; }
void reply();
private:
ChannelMessage( const ChannelMessage & );
ChannelMessage &operator=( const ChannelMessage );
int m_type;
int m_data;
const char *m_msg;
bool m_isCall : 1;
bool m_replied : 1;
bool m_inEventHandler : 1;
Mutex m_guard;
WaitCondition m_condition;
};
class Channel : public QObject
{
Q_OBJECT
public:
enum SendType { OneWay, WaitForReply };
Channel( QObject *parent = 0, const char *name = 0 );
virtual ~Channel();
void send( ChannelMessage *message, SendType type );
protected:
virtual void receiveMessage( ChannelMessage *message, SendType type ) = 0;
private slots:
void deliver();
private:
OnewayNotifier m_notifier;
struct MsgEnvelope
{
MsgEnvelope() : type( OneWay ), msg( 0 ) {}
MsgEnvelope( SendType _type , ChannelMessage *_msg )
: type( _type ), msg( _msg ) {}
SendType type;
ChannelMessage *msg;
};
void deliverOne( const MsgEnvelope &envelope );
typedef QValueList<MsgEnvelope> MsgEnvelopeList;
MsgEnvelopeList m_pendingMessages;
Mutex m_pendingMessagesGuard;
struct Private;
Private *d;
};
}
#endif // THREADUTIL_H
/* vim: et sw=4 ts=4
*/
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