- added ThreadUtil::Thread class

2 files changed, 127 insertions, 0 deletions

diff --git a/noncore/multimedia/opieplayer2/threadutil.cpp b/noncore/multimedia/opieplayer2/threadutil.cpp
index 4055c74..5687f42 100644
--- a/noncore/multimedia/opieplayer2/threadutil.cpp
+++ b/noncore/multimedia/opieplayer2/threadutil.cpp
@@ -1,284 +1,383 @@
 /* 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.
 */
 
 #include "threadutil.h"
 
 #include <qsocketnotifier.h>
 
 #include <pthread.h>
 #include <assert.h>
 #include <unistd.h>
+#include <errno.h>
 
 using namespace ThreadUtil;
 
 struct Mutex::Data
 {
     Data()
     {
         pthread_mutex_init( &mutex, 0 );
     }
     ~Data()
     {
         pthread_mutex_destroy( &mutex );
     }
 
     pthread_mutex_t mutex;
 };
 
 Mutex::Mutex()
     : d( new Data )
 {
 }
 
 Mutex::~Mutex()
 {
     delete d;
 }
 
 void Mutex::lock()
 {
     pthread_mutex_lock( &d->mutex );
 }
 
 void Mutex::unlock()
 {
     pthread_mutex_unlock( &d->mutex );
 }
 
 bool Mutex::tryLock()
 {
     return pthread_mutex_trylock( &d->mutex ) == 0;
 }
 
 bool Mutex::isLocked()
 {
     if ( !tryLock() )
         return true;
 
     unlock();
     return false;
 }
 
 struct WaitCondition::Data
 {
     Data()
     {
         int result = pthread_cond_init( &waitCondition, 0 );
         assert( result == 0 );
     }
     ~Data()
     {
         pthread_cond_destroy( &waitCondition );
     }
 
     pthread_cond_t waitCondition;
 };
 
 WaitCondition::WaitCondition()
     : d( new Data )
 {
 }
 
 WaitCondition::~WaitCondition()
 {
     delete d;
 }
 
 bool WaitCondition::wait()
 {
     Mutex m;
     m.lock();
     return wait( m );
 }
 
 bool WaitCondition::wait( Mutex &mutex )
 {
     return pthread_cond_wait( &d->waitCondition, &mutex.d->mutex );
 }
 
 void WaitCondition::wakeOne()
 {
     pthread_cond_signal( &d->waitCondition );
 }
 
 void WaitCondition::wakeAll()
 {
     pthread_cond_broadcast( &d->waitCondition );
 }
 
+struct Thread::Data
+{
+    Data() : isRunning( false ) 
+    {}
+
+    pthread_t self;
+    Mutex guard;
+    bool isRunning;
+
+    WaitCondition finishCondition;
+};
+
+extern "C"
+{
+
+void _threadutil_terminate_thread( void *arg )
+{
+    Thread *thr = ( Thread* )arg;
+
+    assert( thr );
+
+    AutoLock locker( thr->d->guard );
+    thr->d->isRunning = false;
+    thr->d->finishCondition.wakeAll();
+}
+
+void *_threadutil_start_thread( void *arg )
+{
+    Thread *thr = ( Thread* )arg;
+
+    pthread_cleanup_push( _threadutil_terminate_thread, thr );
+
+    thr->d->isRunning = true;
+    thr->run();
+
+    pthread_cleanup_pop( true );
+
+    Thread::exit();
+    return 0; // never reached
+}
+
+}
+
+Thread::Thread()
+    : d( new Data )
+{
+}
+
+Thread::~Thread()
+{
+    assert( d->isRunning == false );
+    delete d;
+}
+
+void Thread::start()
+{
+    AutoLock lock( d->guard );
+
+    if ( d->isRunning ) {
+        qDebug( "ThreadUtil::Thread::start() called for running thread." );
+        return;
+    }
+
+    pthread_attr_t attributes;
+    pthread_attr_init( &attributes );
+    pthread_attr_setscope( &attributes, PTHREAD_SCOPE_SYSTEM );
+    int err = pthread_create( &d->self, &attributes, _threadutil_start_thread, ( void* )this );
+    if ( err != 0 ) {
+        qDebug( "ThreadUtil::Thread::start() : can't create thread: %s", strerror( err ) );
+        pthread_attr_destroy( &attributes );
+        return;
+    }
+    pthread_attr_destroy( &attributes );
+}
+
+void Thread::terminate()
+{
+    AutoLock lock( d->guard );
+    if ( !d->isRunning )
+        return;
+
+    pthread_cancel( d->self );
+}
+
+bool Thread::wait()
+{
+    AutoLock lock( d->guard );
+    if ( !d->isRunning )
+        return true;
+
+    return d->finishCondition.wait( d->guard );
+}
+
+void Thread::exit()
+{
+    pthread_exit( 0 );
+}
+
 OnewayNotifier::OnewayNotifier()
 {
     int fds[ 2 ];
     pipe( fds );
     m_readFd = fds[ 0 ];
     m_writeFd = fds[ 1 ];
 
     m_notifier = new QSocketNotifier( m_readFd, QSocketNotifier::Read );
     connect( m_notifier, SIGNAL( activated( int ) ),
              this, SLOT( wakeUp() ) );
 }
 
 OnewayNotifier::~OnewayNotifier()
 {
     delete m_notifier;
 
     ::close( m_readFd );
     ::close( m_writeFd );
 }
 
 void OnewayNotifier::notify()
 {
     const char c = 42;
     ::write( m_writeFd, &c, 1 );
 }
 
 void OnewayNotifier::wakeUp()
 {
     char c = 0;
 
     if ( ::read( m_readFd, &c, 1 ) != 1 )
         return;
 
     emit awake();
 }
 
 ChannelMessage::ChannelMessage( int type )
     : m_type( type ), m_isCall( false ), m_replied( false ),
       m_inEventHandler( false )
 {
 }
 
 ChannelMessage::~ChannelMessage()
 {
     if ( m_guard.isLocked() )
         m_guard.unlock();
 }
 
 void ChannelMessage::reply()
 {
     if ( !m_isCall )
     {
         qDebug( "ChannelMessage::reply() - can't reply oneway message!" );
         return;
     }
 
     if ( m_inEventHandler )
     {
         m_replied = true;
         return;
     }
 
     m_condition.wakeOne();
     m_guard.unlock();
 }
 
 struct Channel::Private
 {
     Private()
     {
         ownerThread = pthread_self();
     }
 
     pthread_t ownerThread;
 };
 
 Channel::Channel( QObject *parent, const char *name )
     : QObject( parent, name ), d( new Private )
 {
     connect( &m_notifier, SIGNAL( awake() ),
              this, SLOT( deliver() ) );
 }
 
 Channel::~Channel()
 {
     delete d;
 }
 
 void Channel::send( ChannelMessage *message, SendType type )
 {
     if ( type == WaitForReply )
     {
         message->m_guard.lock();
         message->m_isCall = true;
     }
 
     m_pendingMessagesGuard.lock();
     m_pendingMessages << MsgEnvelope( type, message );
     m_pendingMessagesGuard.unlock();
 
     if ( d->ownerThread == pthread_self() ) {
         assert( type != WaitForReply );
 
         deliver();
     }
     else
         m_notifier.notify();
     //QThread::postEvent( this, new QCustomEvent( QEvent::User, envelope ) );
 
     if ( type == WaitForReply )
     {
         message->m_condition.wait( message->m_guard );
         message->m_guard.unlock();
     }
 }
 
 void Channel::deliver()
 {
     AutoLock lock( m_pendingMessagesGuard );
 
     while ( !m_pendingMessages.isEmpty() ) {
         MsgEnvelope envelope = m_pendingMessages.first();
 
         m_pendingMessages.remove( m_pendingMessages.begin() );
 
         m_pendingMessagesGuard.unlock();
         deliverOne( envelope );
         m_pendingMessagesGuard.lock();
     }
 }
 
 void Channel::deliverOne( const MsgEnvelope &envelope )
 {
     ChannelMessage *msg = envelope.msg;
 
     assert( msg );
 
     if ( envelope.type == WaitForReply )
     {
         msg->m_guard.lock();
         msg->m_inEventHandler = true;
     }
 
     receiveMessage( msg, envelope.type );
 
     if ( envelope.type == WaitForReply )
     {
         msg->m_inEventHandler = false;
         if ( msg->m_replied )
         {
             msg->m_condition.wakeOne();
             // this is a bit tricky. we unlock only when we reply.
             // reply() does an unlock as well.
             msg->m_guard.unlock();
         }
     }
 }
 
 /* vim: et sw=4 ts=4
  */
diff --git a/noncore/multimedia/opieplayer2/threadutil.h b/noncore/multimedia/opieplayer2/threadutil.h
index 5cc4cdc..b537cc1 100644
--- a/noncore/multimedia/opieplayer2/threadutil.h
+++ b/noncore/multimedia/opieplayer2/threadutil.h
@@ -1,176 +1,204 @@
 /* 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;
 
+extern "C"
+{
+    void *_threadutil_start_thread( void* );
+    void _threadutil_terminate_thread( void* );
+}
+
 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
+    {
+        friend void *::_threadutil_start_thread( void* );
+        friend void ::_threadutil_terminate_thread( void* );
+    public:
+        Thread();
+        virtual ~Thread();
+
+        void start();
+        void terminate();
+
+        bool wait();
+
+        static void exit();
+    protected:
+        virtual void run() = 0;
+
+    private:
+        struct Data;
+        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 );
         virtual ~ChannelMessage();
 
         int type() const { return m_type; }
 
         void reply();
 
     private:
         ChannelMessage( const ChannelMessage & );
         ChannelMessage &operator=( const ChannelMessage );
 
         int m_type;
         bool m_isCall : 1;
         bool m_replied : 1;
         bool m_inEventHandler : 1;
         Mutex m_guard;
         WaitCondition m_condition;
         QGuardedPtr<Channel> m_channel;
     };
 
     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
  */