OpenWalnut
1.4.0
|
00001 //--------------------------------------------------------------------------- 00002 // 00003 // Project: OpenWalnut ( http://www.openwalnut.org ) 00004 // 00005 // Copyright 2009 OpenWalnut Community, BSV@Uni-Leipzig and CNCF@MPI-CBS 00006 // For more information see http://www.openwalnut.org/copying 00007 // 00008 // This file is part of OpenWalnut. 00009 // 00010 // OpenWalnut is free software: you can redistribute it and/or modify 00011 // it under the terms of the GNU Lesser General Public License as published by 00012 // the Free Software Foundation, either version 3 of the License, or 00013 // (at your option) any later version. 00014 // 00015 // OpenWalnut is distributed in the hope that it will be useful, 00016 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00017 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00018 // GNU Lesser General Public License for more details. 00019 // 00020 // You should have received a copy of the GNU Lesser General Public License 00021 // along with OpenWalnut. If not, see <http://www.gnu.org/licenses/>. 00022 // 00023 //--------------------------------------------------------------------------- 00024 00025 #include "WConditionOneShot.h" 00026 00027 WConditionOneShot::WConditionOneShot() 00028 : WCondition() 00029 { 00030 // initialize members 00031 m_lock = boost::unique_lock<boost::shared_mutex>( m_mutex ); 00032 } 00033 00034 WConditionOneShot::~WConditionOneShot() 00035 { 00036 // cleanup 00037 try 00038 { 00039 m_lock.unlock(); 00040 } 00041 catch( const boost::lock_error &e ) 00042 { 00043 // ignore this particular error since it is thrown when the lock is not locked anymore 00044 } 00045 } 00046 00047 void WConditionOneShot::wait() const 00048 { 00049 // now we wait until the write lock is released and we can get a read lock 00050 boost::shared_lock<boost::shared_mutex> slock = boost::shared_lock<boost::shared_mutex>( m_mutex ); 00051 slock.unlock(); 00052 } 00053 00054 void WConditionOneShot::notify() 00055 { 00056 try 00057 { 00058 m_lock.unlock(); 00059 } 00060 catch( const boost::lock_error &e ) 00061 { 00062 // ignore this particular error since it is thrown when the lock is not locked anymore 00063 // because the notify was called multiple times 00064 } 00065 00066 WCondition::notify(); 00067 } 00068