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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#include "cancellablejob.hxx"
#include "threadmanager.hxx"
#include <threadlistener.hxx>
#include <osl/diagnose.h>
#include <algorithm>
#include <com/sun/star/util/XJobManager.hpp>
using namespace ::com::sun::star;
/** class to manage threads
#i73788#
*/
const std::deque< ThreadManager::tThreadData >::size_type ThreadManager::snStartedSize = 10;
ThreadManager::ThreadManager( uno::Reference< util::XJobManager > const & rThreadJoiner )
: mrThreadJoiner( rThreadJoiner ),
mnThreadIDCounter( 0 ),
maStartNewThreadIdle("SW ThreadManager StartNewThreadIdle"),
mbStartingOfThreadsSuspended( false )
{
}
void ThreadManager::Init()
{
mpThreadListener = std::make_shared<ThreadListener>( *this );
maStartNewThreadIdle.SetPriority( TaskPriority::LOWEST );
maStartNewThreadIdle.SetInvokeHandler( LINK( this, ThreadManager, TryToStartNewThread ) );
}
ThreadManager::~ThreadManager()
{
maWaitingForStartThreads.clear();
maStartedThreads.clear();
}
std::weak_ptr< IFinishedThreadListener > ThreadManager::GetThreadListenerWeakRef() const
{
return mpThreadListener;
}
void ThreadManager::NotifyAboutFinishedThread( const oslInterlockedCount nThreadID )
{
RemoveThread( nThreadID, true );
}
oslInterlockedCount ThreadManager::AddThread(
const rtl::Reference< ObservableThread >& rThread )
{
std::unique_lock aGuard(maMutex);
// create new thread
tThreadData aThreadData;
oslInterlockedCount nNewThreadID( osl_atomic_increment( &mnThreadIDCounter ) );
{
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() < snStartedSize &&
!mbStartingOfThreadsSuspended )
{
// 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() )
{
maStartNewThreadIdle.Start();
}
}
}
else
{
// Thread will be started later
maWaitingForStartThreads.push_back( aThreadData );
}
return nNewThreadID;
}
void ThreadManager::RemoveThread( const oslInterlockedCount nThreadID,
const bool bThreadFinished )
{
// --> SAFE ----
std::unique_lock 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
css::uno::Reference< css::util::XJobManager > rThreadJoiner( mrThreadJoiner );
if ( rThreadJoiner.is() )
{
rThreadJoiner->releaseJob( aTmpThreadData.aJob );
}
else
{
OSL_FAIL( "<ThreadManager::RemoveThread(..)> - ThreadJoiner already gone!" );
}
}
// Try to start thread from waiting ones
aGuard.unlock();
TryToStartNewThread( nullptr );
}
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
css::uno::Reference< css::util::XJobManager > rThreadJoiner( mrThreadJoiner );
if ( rThreadJoiner.is() )
{
rThreadJoiner->registerJob( rThreadData.aJob );
}
else
{
OSL_FAIL( "<ThreadManager::StartThread(..)> - ThreadJoiner already gone!" );
}
}
else
{
// thread couldn't be started.
maWaitingForStartThreads.push_front( rThreadData );
}
return bThreadStarted;
}
IMPL_LINK_NOARG(ThreadManager, TryToStartNewThread, Timer *, void)
{
std::unique_lock aGuard(maMutex);
if ( mbStartingOfThreadsSuspended )
return;
// 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() )
{
maStartNewThreadIdle.Start();
}
}
}
void ThreadManager::ResumeStartingOfThreads()
{
std::unique_lock aGuard(maMutex);
mbStartingOfThreadsSuspended = false;
while ( maStartedThreads.size() < snStartedSize &&
!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() )
{
maStartNewThreadIdle.Start();
break;
}
}
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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