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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 <comphelper/asyncnotification.hxx>
#include <osl/diagnose.h>
#include <osl/mutex.hxx>
#include <osl/conditn.hxx>
#include <comphelper/guarding.hxx>
#include <cassert>
#include <deque>
#include <functional>
#include <algorithm>
namespace comphelper
{
//= AnyEvent
AnyEvent::AnyEvent()
{
}
AnyEvent::~AnyEvent()
{
}
//= ProcessableEvent
struct ProcessableEvent
{
AnyEventRef aEvent;
::rtl::Reference< IEventProcessor > xProcessor;
ProcessableEvent()
{
}
ProcessableEvent( const AnyEventRef& _rEvent, const ::rtl::Reference< IEventProcessor >& _xProcessor )
:aEvent( _rEvent )
,xProcessor( _xProcessor )
{
}
};
typedef ::std::deque< ProcessableEvent > EventQueue;
struct EqualProcessor : public ::std::unary_function< ProcessableEvent, bool >
{
const ::rtl::Reference< IEventProcessor >& rProcessor;
EqualProcessor( const ::rtl::Reference< IEventProcessor >& _rProcessor ) :rProcessor( _rProcessor ) { }
bool operator()( const ProcessableEvent& _rEvent )
{
return _rEvent.xProcessor.get() == rProcessor.get();
}
};
//= EventNotifierImpl
struct EventNotifierImpl
{
::osl::Mutex aMutex;
::osl::Condition aPendingActions;
EventQueue aEvents;
bool bTerminate;
EventNotifierImpl()
:bTerminate( false )
{
}
};
//= AsyncEventNotifier
AsyncEventNotifier::AsyncEventNotifier(char const * name):
Thread(name), m_pImpl(new EventNotifierImpl)
{
}
AsyncEventNotifier::~AsyncEventNotifier()
{
}
void AsyncEventNotifier::removeEventsForProcessor( const ::rtl::Reference< IEventProcessor >& _xProcessor )
{
::osl::MutexGuard aGuard( m_pImpl->aMutex );
// remove all events for this processor
::std::remove_if( m_pImpl->aEvents.begin(), m_pImpl->aEvents.end(), EqualProcessor( _xProcessor ) );
}
void SAL_CALL AsyncEventNotifier::terminate()
{
::osl::MutexGuard aGuard( m_pImpl->aMutex );
// remember the termination request
m_pImpl->bTerminate = true;
// awake the thread
m_pImpl->aPendingActions.set();
}
void AsyncEventNotifier::addEvent( const AnyEventRef& _rEvent, const ::rtl::Reference< IEventProcessor >& _xProcessor )
{
::osl::MutexGuard aGuard( m_pImpl->aMutex );
OSL_TRACE( "AsyncEventNotifier(%p): adding %p", this, _rEvent.get() );
// remember this event
m_pImpl->aEvents.push_back( ProcessableEvent( _rEvent, _xProcessor ) );
// awake the thread
m_pImpl->aPendingActions.set();
}
void AsyncEventNotifier::execute()
{
for (;;)
{
m_pImpl->aPendingActions.wait();
ProcessableEvent aEvent;
{
osl::MutexGuard aGuard(m_pImpl->aMutex);
if (m_pImpl->bTerminate)
{
break;
}
if (!m_pImpl->aEvents.empty())
{
aEvent = m_pImpl->aEvents.front();
m_pImpl->aEvents.pop_front();
OSL_TRACE(
"AsyncEventNotifier(%p): popping %p", this,
aEvent.aEvent.get());
}
if (m_pImpl->aEvents.empty())
{
m_pImpl->aPendingActions.reset();
}
}
if (aEvent.aEvent.is()) {
assert(aEvent.xProcessor.is());
aEvent.xProcessor->processEvent(*aEvent.aEvent);
}
}
}
} // namespace comphelper
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|
