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SuspendingState.cpp
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1 /* -*- C++ -*-
2 
3  This file implements the SuspendingState class.
4 
5  $ Author: Mirko Boehm $
6  $ Copyright: (C) 2005, 2006 Mirko Boehm $
7  $ Contact: mirko@kde.org
8  http://www.kde.org
9  http://www.hackerbuero.org $
10 
11  This library is free software; you can redistribute it and/or
12  modify it under the terms of the GNU Library General Public
13  License as published by the Free Software Foundation; either
14  version 2 of the License, or (at your option) any later version.
15 
16  This library is distributed in the hope that it will be useful,
17  but WITHOUT ANY WARRANTY; without even the implied warranty of
18  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19  Library General Public License for more details.
20 
21  You should have received a copy of the GNU Library General Public License
22  along with this library; see the file COPYING.LIB. If not, write to
23  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
24  Boston, MA 02110-1301, USA.
25 
26  $Id: SuspendingState.cpp 30 2005-08-16 16:16:04Z mirko $
27 */
28 
29 #include "SuspendingState.h"
30 
31 #include "State.h"
32 #include "WeaverImpl.h"
33 #include "ThreadWeaver.h"
34 
35 using namespace ThreadWeaver;
36 
37 void SuspendingState::suspend()
38 {
39  // this request is not handled in Suspending state (we are already
40  // suspending...)
41 }
42 
43 void SuspendingState::resume()
44 {
45  weaver()->setState ( WorkingHard );
46 }
47 
48 void SuspendingState::activated()
49 {
50  if ( weaver()->activeThreadCount() == 0 )
51  {
52  weaver()->setState( Suspended );
53  }
54 }
55 
56 Job* SuspendingState::applyForWork ( Thread *th, Job* previous )
57 {
58  if ( weaver()->activeThreadCount() == 0 )
59  {
60  weaver()->setState ( Suspended );
61  }
62  weaver()->waitForAvailableJob ( th );
63  return weaver()->applyForWork ( th, previous );
64 }
65 
66 void SuspendingState::waitForAvailableJob ( Thread *th )
67 {
68  weaver()->blockThreadUntilJobsAreBeingAssigned( th );
69 }
70 
71 StateId SuspendingState::stateId() const
72 {
73  return Suspending;
74 }
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