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ThreadWeaver

DependencyPolicy.h

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00001 /* -*- C++ -*-
00002 
00003    This file implements the DependencyPolicy class.
00004 
00005    $ Author: Mirko Boehm $
00006    $ Copyright: (C) 2004, 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: DebuggingAids.cpp 20 2005-08-08 21:02:51Z mirko $
00027 */
00028 
00029 #ifndef DEPENDENCYPOLICY_H
00030 #define DEPENDENCYPOLICY_H
00031 
00032 template <typename T> class QList;
00033 
00034 #include "QueuePolicy.h"
00035 
00036 namespace ThreadWeaver {
00037 
00049     class THREADWEAVER_EXPORT DependencyPolicy : public QueuePolicy
00050     {
00051     public:
00053       ~DependencyPolicy();
00054 
00060         void addDependency( Job* jobA,  Job* jobB );
00061 
00076         bool removeDependency( Job* jobA, Job* jobB );
00077 
00085         void resolveDependencies ( Job* );
00086 
00088         QList<Job*> getDependencies( Job* ) const;
00089 
00090         // FIXME add factory method for singleton creation
00091         static DependencyPolicy& instance();
00092 
00093         bool canRun( Job* );
00094 
00095         void free( Job* );
00096 
00097         void release( Job* );
00098 
00099         void destructed( Job* );
00100 
00101     protected:
00105         bool hasUnresolvedDependencies( Job* ) const;
00106 
00107         DependencyPolicy();
00108 
00109     private:
00110         class Private;
00111         Private * const d;
00112 
00113     public:
00115         void dumpJobDependencies();
00116     };
00117 
00118 }
00119 
00120 #endif

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