OpenWalnut  1.2.5
 All Classes Namespaces Functions Variables Typedefs Enumerations Enumerator Friends Groups Pages
WConditionOneShot.cpp
1 //---------------------------------------------------------------------------
2 //
3 // Project: OpenWalnut ( http://www.openwalnut.org )
4 //
5 // Copyright 2009 OpenWalnut Community, BSV@Uni-Leipzig and CNCF@MPI-CBS
6 // For more information see http://www.openwalnut.org/copying
7 //
8 // This file is part of OpenWalnut.
9 //
10 // OpenWalnut is free software: you can redistribute it and/or modify
11 // it under the terms of the GNU Lesser General Public License as published by
12 // the Free Software Foundation, either version 3 of the License, or
13 // (at your option) any later version.
14 //
15 // OpenWalnut is distributed in the hope that it will be useful,
16 // but WITHOUT ANY WARRANTY; without even the implied warranty of
17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 // GNU Lesser General Public License for more details.
19 //
20 // You should have received a copy of the GNU Lesser General Public License
21 // along with OpenWalnut. If not, see <http://www.gnu.org/licenses/>.
22 //
23 //---------------------------------------------------------------------------
24 
25 #include "WConditionOneShot.h"
26 
28  : WCondition()
29 {
30  // initialize members
31  m_lock = boost::unique_lock<boost::shared_mutex>( m_mutex );
32 }
33 
35 {
36  // win crashes here sometimes
37 #ifndef _MSC_VER
38  // cleanup
39  try
40  {
41  m_lock.unlock();
42  }
43  catch( const boost::lock_error &e )
44  {
45  // ignore this particular error since it is thrown when the lock is not locked anymore
46  }
47 #endif
48 }
49 
51 {
52  // now we wait until the write lock is released and we can get a read lock
53  boost::shared_lock<boost::shared_mutex> slock = boost::shared_lock<boost::shared_mutex>( m_mutex );
54  slock.unlock();
55 }
56 
58 {
59  try
60  {
61  m_lock.unlock();
62  }
63  catch( const boost::lock_error &e )
64  {
65  // ignore this particular error since it is thrown when the lock is not locked anymore
66  // because the notify was called multiple times
67  }
68 
70 }
71