| -rw-r--r-- | noncore/multimedia/opieplayer2/threadutil.cpp | 99 | ||||
| -rw-r--r-- | noncore/multimedia/opieplayer2/threadutil.h | 28 |
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 @@ -3,48 +3,49 @@ 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() { @@ -101,48 +102,146 @@ WaitCondition::~WaitCondition() } 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 ); 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 @@ -5,48 +5,54 @@ 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 @@ -60,48 +66,70 @@ namespace ThreadUtil 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; |