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/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2000, 2010 Oracle and/or its affiliates.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
#include "precompiled_sw.hxx"
#include <threadmanager.hxx>
#include <errhdl.hxx>
#include <algorithm>
using namespace ::com::sun::star;
/** class to manage threads
OD 2007-01-29 #i73788#
@author OD
*/
const std::deque< ThreadManager::tThreadData >::size_type ThreadManager::mnStartedSize = 10;
ThreadManager::ThreadManager( uno::Reference< util::XJobManager >& rThreadJoiner )
: maMutex(),
mrThreadJoiner( rThreadJoiner ),
mpThreadListener(),
mnThreadIDCounter( 0 ),
maWaitingForStartThreads(),
maStartedThreads(),
maStartNewThreadTimer(),
mbStartingOfThreadsSuspended( false )
{
}
void ThreadManager::Init()
{
mpThreadListener.reset( new ThreadListener( *this ) );
maStartNewThreadTimer.SetTimeout( 2000 );
maStartNewThreadTimer.SetTimeoutHdl( LINK( this, ThreadManager, TryToStartNewThread ) );
}
ThreadManager::~ThreadManager()
{
maWaitingForStartThreads.clear();
maStartedThreads.clear();
}
boost::weak_ptr< IFinishedThreadListener > ThreadManager::GetThreadListenerWeakRef()
{
return mpThreadListener;
}
void ThreadManager::NotifyAboutFinishedThread( const oslInterlockedCount nThreadID )
{
RemoveThread( nThreadID, true );
}
oslInterlockedCount ThreadManager::AddThread(
const rtl::Reference< ObservableThread >& rThread )
{
osl::MutexGuard aGuard(maMutex);
// create new thread
tThreadData aThreadData;
oslInterlockedCount nNewThreadID( RetrieveNewThreadID() );
{
aThreadData.nThreadID = nNewThreadID;
aThreadData.pThread = rThread;
aThreadData.aJob = new CancellableJob( aThreadData.pThread );
aThreadData.pThread->setPriority( osl_Thread_PriorityBelowNormal );
mpThreadListener->ListenToThread( aThreadData.nThreadID,
*(aThreadData.pThread) );
}
// add thread to manager
if ( maStartedThreads.size() < mnStartedSize &&
!StartingOfThreadsSuspended() )
{
// Try to start thread
if ( !StartThread( aThreadData ) )
{
// No success on starting thread
// If no more started threads exist, but still threads are waiting,
// setup Timer to start thread from waiting ones
if ( maStartedThreads.empty() && !maWaitingForStartThreads.empty() )
{
maStartNewThreadTimer.Start();
}
}
}
else
{
// Thread will be started later
maWaitingForStartThreads.push_back( aThreadData );
}
return nNewThreadID;
}
void ThreadManager::RemoveThread( const oslInterlockedCount nThreadID,
const bool bThreadFinished )
{
// --> SAFE ----
osl::MutexGuard aGuard(maMutex);
std::deque< tThreadData >::iterator aIter =
std::find_if( maStartedThreads.begin(), maStartedThreads.end(),
ThreadPred( nThreadID ) );
if ( aIter != maStartedThreads.end() )
{
tThreadData aTmpThreadData( (*aIter) );
maStartedThreads.erase( aIter );
if ( bThreadFinished )
{
// release thread as job from thread joiner instance
::com::sun::star::uno::Reference< ::com::sun::star::util::XJobManager > rThreadJoiner( mrThreadJoiner );
if ( rThreadJoiner.is() )
{
rThreadJoiner->releaseJob( aTmpThreadData.aJob );
}
else
{
ASSERT( false, "<ThreadManager::RemoveThread(..)> - ThreadJoiner already gone!" );
}
}
// Try to start thread from waiting ones
TryToStartNewThread( 0 );
}
else
{
aIter = std::find_if( maWaitingForStartThreads.begin(),
maWaitingForStartThreads.end(), ThreadPred( nThreadID ) );
if ( aIter != maWaitingForStartThreads.end() )
{
maWaitingForStartThreads.erase( aIter );
}
}
// <-- SAFE ----
}
bool ThreadManager::StartWaitingThread()
{
if ( !maWaitingForStartThreads.empty() )
{
tThreadData aThreadData( maWaitingForStartThreads.front() );
maWaitingForStartThreads.pop_front();
return StartThread( aThreadData );
}
else
{
return false;
}
}
bool ThreadManager::StartThread( const tThreadData& rThreadData )
{
bool bThreadStarted( false );
if ( rThreadData.pThread->create() )
{
// start of thread successful.
bThreadStarted = true;
maStartedThreads.push_back( rThreadData );
// register thread as job at thread joiner instance
::com::sun::star::uno::Reference< ::com::sun::star::util::XJobManager > rThreadJoiner( mrThreadJoiner );
if ( rThreadJoiner.is() )
{
rThreadJoiner->registerJob( rThreadData.aJob );
}
else
{
ASSERT( false, "<ThreadManager::StartThread(..)> - ThreadJoiner already gone!" );
}
}
else
{
// thread couldn't be started.
maWaitingForStartThreads.push_front( rThreadData );
}
return bThreadStarted;
}
IMPL_LINK( ThreadManager, TryToStartNewThread, Timer *, EMPTYARG )
{
osl::MutexGuard aGuard(maMutex);
if ( !StartingOfThreadsSuspended() )
{
// Try to start thread from waiting ones
if ( !StartWaitingThread() )
{
// No success on starting thread
// If no more started threads exist, but still threads are waiting,
// setup Timer to start thread from waiting ones
if ( maStartedThreads.empty() && !maWaitingForStartThreads.empty() )
{
maStartNewThreadTimer.Start();
}
}
}
return sal_True;
}
void ThreadManager::ResumeStartingOfThreads()
{
osl::MutexGuard aGuard(maMutex);
mbStartingOfThreadsSuspended = false;
while ( maStartedThreads.size() < mnStartedSize &&
!maWaitingForStartThreads.empty() )
{
if ( !StartWaitingThread() )
{
// No success on starting thread
// If no more started threads exist, but still threads are waiting,
// setup Timer to start thread from waiting ones
if ( maStartedThreads.empty() && !maWaitingForStartThreads.empty() )
{
maStartNewThreadTimer.Start();
break;
}
}
}
}
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