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ThreadWeaver

SuspendingState.cpp

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00001 /* -*- C++ -*-
00002 
00003    This file implements the SuspendingState class.
00004 
00005    $ Author: Mirko Boehm $
00006    $ Copyright: (C) 2005, 2006 Mirko Boehm $
00007    $ Contact: mirko@kde.org
00008          http://www.kde.org
00009          http://www.hackerbuero.org $
00010 
00011    This library is free software; you can redistribute it and/or
00012    modify it under the terms of the GNU Library General Public
00013    License as published by the Free Software Foundation; either
00014    version 2 of the License, or (at your option) any later version.
00015 
00016    This library is distributed in the hope that it will be useful,
00017    but WITHOUT ANY WARRANTY; without even the implied warranty of
00018    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00019    Library General Public License for more details.
00020 
00021    You should have received a copy of the GNU Library General Public License
00022    along with this library; see the file COPYING.LIB.  If not, write to
00023    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
00024    Boston, MA 02110-1301, USA.
00025 
00026    $Id: SuspendingState.cpp 30 2005-08-16 16:16:04Z mirko $
00027 */
00028 
00029 #include "SuspendingState.h"
00030 
00031 #include "State.h"
00032 #include "WeaverImpl.h"
00033 #include "ThreadWeaver.h"
00034 
00035 using namespace ThreadWeaver;
00036 
00037 void SuspendingState::suspend()
00038 {
00039     // this request is not handled in Suspending state (we are already
00040     // suspending...)
00041 }
00042 
00043 void SuspendingState::resume()
00044 {
00045     weaver()->setState ( WorkingHard );
00046 }
00047 
00048 void SuspendingState::activated()
00049 {
00050     if ( weaver()->activeThreadCount() == 0 )
00051     {
00052         weaver()->setState( Suspended );
00053     }
00054 }
00055 
00056 Job* SuspendingState::applyForWork ( Thread *th,  Job* previous )
00057 {
00058     if ( weaver()->activeThreadCount() == 0 )
00059     {
00060         weaver()->setState ( Suspended );
00061     }
00062     weaver()->waitForAvailableJob ( th );
00063     return weaver()->applyForWork ( th,  previous );
00064 }
00065 
00066 void SuspendingState::waitForAvailableJob ( Thread *th )
00067 {
00068     weaver()->blockThreadUntilJobsAreBeingAssigned( th );
00069 }
00070 
00071 StateId SuspendingState::stateId() const
00072 {
00073     return Suspending;
00074 }

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