1 // Copyright (C) 2007-2014 CEA/DEN, EDF R&D, OPEN CASCADE
3 // Copyright (C) 2003-2007 OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
4 // CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
6 // This library is free software; you can redistribute it and/or
7 // modify it under the terms of the GNU Lesser General Public
8 // License as published by the Free Software Foundation; either
9 // version 2.1 of the License, or (at your option) any later version.
11 // This library is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 // Lesser General Public License for more details.
16 // You should have received a copy of the GNU Lesser General Public
17 // License along with this library; if not, write to the Free Software
18 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 // See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
23 // File : PyInterp_Dispatcher.cxx
24 // Author : Sergey ANIKIN, OCC
27 #include "PyInterp_Dispatcher.h" // !!! WARNING !!! THIS INCLUDE MUST BE THE VERY FIRST !!!
28 #include "PyInterp_Interp.h"
29 #include "PyInterp_Watcher.h"
30 #include "PyInterp_Request.h"
33 #include <QCoreApplication>
35 PyInterp_Dispatcher* PyInterp_Dispatcher::myInstance = 0;
37 PyInterp_Dispatcher* PyInterp_Dispatcher::Get()
40 myInstance = new PyInterp_Dispatcher();
44 PyInterp_Dispatcher::PyInterp_Dispatcher()
47 myWatcher = new PyInterp_Watcher();
50 PyInterp_Dispatcher::~PyInterp_Dispatcher()
52 // Clear the request queue
55 QListIterator<RequestPtr> it( myQueue );
56 while ( it.hasNext() )
57 PyInterp_Request::Destroy( it.next() );
60 myQueueMutex.unlock();
62 // Wait for run() to finish
69 bool PyInterp_Dispatcher::IsBusy() const
74 void PyInterp_Dispatcher::Exec( PyInterp_Request* theRequest )
79 //if ( theRequest->IsSync() && !IsBusy() ) // synchronous processing - nothing is done if dispatcher is busy!
80 if ( theRequest->IsSync() ) // synchronous processing
81 processRequest( theRequest );
82 else // asynchronous processing
85 myQueue.enqueue( theRequest );
86 if ( theRequest->listener() )
87 QObject::connect( theRequest->listener(), SIGNAL( destroyed( QObject* ) ), myWatcher, SLOT( onDestroyed( QObject* ) ) );
88 myQueueMutex.unlock();
95 void PyInterp_Dispatcher::run()
97 // MESSAGE("*** PyInterp_Dispatcher::run(): STARTED")
98 PyInterp_Request* aRequest;
100 // prepare for queue size check
103 while( myQueue.size() ) {
104 // MESSAGE("*** PyInterp_Dispatcher::run(): next request taken from the queue")
105 aRequest = myQueue.head();
107 // let other threads append their requests to the end of the queue
108 myQueueMutex.unlock();
110 // processRequest() may delete a request, so this pointer must not be used
111 // after request is processed!
112 processRequest( aRequest );
114 // prepare for removal of the first request in the queue
116 // IMPORTANT: the first item could have been removed by objectDestroyed() --> we have to check it
117 if ( myQueue.head() == aRequest ) // It's still here --> remove it
120 // MESSAGE("*** PyInterp_Dispatcher::run(): request processed")
123 myQueueMutex.unlock();
124 // MESSAGE("*** PyInterp_Dispatcher::run(): FINISHED")
127 void PyInterp_Dispatcher::processRequest( PyInterp_Request* theRequest )
129 theRequest->process();
132 void PyInterp_Dispatcher::objectDestroyed( const QObject* o )
134 // prepare for modification of the queue
137 QMutableListIterator<RequestPtr> it( myQueue );
138 while ( it.hasNext() )
140 RequestPtr r = it.next();
141 if ( o == r->listener() )
143 r->setListener( 0 ); // to prevent event posting
148 myQueueMutex.unlock();