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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/diagnose_ex.hxx>
#include <osl/diagnose.h>
#include <sal/log.hxx>
#include <slideshowexceptions.hxx>
#include <activity.hxx>
#include <activitiesqueue.hxx>
#include <algorithm>
#include <memory>
#include <utility>
using namespace ::com::sun::star;
namespace slideshow::internal
{
ActivitiesQueue::ActivitiesQueue(
std::shared_ptr< ::canvas::tools::ElapsedTime > pPresTimer ) :
mpTimer(std::move( pPresTimer )),
maCurrentActivitiesWaiting(),
maCurrentActivitiesReinsert(),
maDequeuedActivities()
{
}
ActivitiesQueue::~ActivitiesQueue()
{
// dispose all queue entries
try
{
for( const auto& pActivity : maCurrentActivitiesWaiting )
pActivity->dispose();
for( const auto& pActivity : maCurrentTailActivitiesWaiting )
pActivity->dispose();
for( const auto& pActivity : maCurrentActivitiesReinsert )
pActivity->dispose();
}
catch (const uno::Exception&)
{
TOOLS_WARN_EXCEPTION("slideshow", "");
}
}
bool ActivitiesQueue::addActivity( const ActivitySharedPtr& pActivity )
{
OSL_ENSURE( pActivity, "ActivitiesQueue::addActivity: activity ptr NULL" );
if( !pActivity )
return false;
// add entry to waiting list
maCurrentActivitiesWaiting.push_back( pActivity );
return true;
}
bool ActivitiesQueue::addTailActivity(const ActivitySharedPtr &pActivity)
{
OSL_ENSURE( pActivity, "ActivitiesQueue::addTailActivity: activity ptr NULL" );
if( !pActivity )
return false;
// Activities that should be processed last are kept in a different
// ActivityQueue, and later appended to the end of the maCurrentActivitiesWaiting
// on the beginning of ActivitiesQueue::process()
maCurrentTailActivitiesWaiting.push_back( pActivity );
return true;
}
void ActivitiesQueue::process()
{
SAL_INFO("slideshow.verbose", "ActivitiesQueue: outer loop heartbeat" );
// If there are activities to be processed last append them to the end of the ActivitiesQueue
maCurrentActivitiesWaiting.insert( maCurrentActivitiesWaiting.end(),
maCurrentTailActivitiesWaiting.begin(),
maCurrentTailActivitiesWaiting.end() );
maCurrentTailActivitiesWaiting.clear();
// accumulate time lag for all activities, and lag time
// base if necessary:
double fLag = 0.0;
for ( const auto& rxActivity : maCurrentActivitiesWaiting )
fLag = std::max<double>( fLag, rxActivity->calcTimeLag() );
if (fLag > 0.0)
{
mpTimer->adjustTimer( -fLag );
}
// process list of activities
while( !maCurrentActivitiesWaiting.empty() )
{
// process topmost activity
ActivitySharedPtr pActivity( maCurrentActivitiesWaiting.front() );
maCurrentActivitiesWaiting.pop_front();
bool bReinsert( false );
try
{
// fire up activity
bReinsert = pActivity->perform();
}
catch( uno::RuntimeException& )
{
throw;
}
catch( uno::Exception& )
{
// catch anything here, we don't want
// to leave this scope under _any_
// circumstance. Although, do _not_
// reinsert an activity that threw
// once.
// NOTE: we explicitly don't catch(...) here,
// since this will also capture segmentation
// violations and the like. In such a case, we
// still better let our clients now...
TOOLS_WARN_EXCEPTION( "slideshow", "" );
}
catch( SlideShowException& )
{
// catch anything here, we don't want
// to leave this scope under _any_
// circumstance. Although, do _not_
// reinsert an activity that threw
// once.
// NOTE: we explicitly don't catch(...) here,
// since this will also capture segmentation
// violations and the like. In such a case, we
// still better let our clients now...
SAL_WARN("slideshow", "::presentation::internal::ActivitiesQueue: Activity threw a SlideShowException, removing from ring" );
}
if( bReinsert )
maCurrentActivitiesReinsert.push_back( pActivity );
else
maDequeuedActivities.push_back( pActivity );
SAL_INFO("slideshow.verbose", "ActivitiesQueue: inner loop heartbeat" );
}
if( !maCurrentActivitiesReinsert.empty() )
{
// reinsert all processed, but not finished
// activities back to waiting queue. With swap(),
// we kill two birds with one stone: we reuse the
// list nodes, and we clear the
// maCurrentActivitiesReinsert list
maCurrentActivitiesWaiting.swap( maCurrentActivitiesReinsert );
}
}
void ActivitiesQueue::processDequeued()
{
// notify all dequeued activities from last round
for( const auto& pActivity : maDequeuedActivities )
pActivity->dequeued();
maDequeuedActivities.clear();
}
bool ActivitiesQueue::isEmpty() const
{
return maCurrentActivitiesWaiting.empty() && maCurrentActivitiesReinsert.empty();
}
void ActivitiesQueue::clear()
{
// dequeue all entries:
for( const auto& pActivity : maCurrentActivitiesWaiting )
pActivity->dequeued();
ActivityQueue().swap( maCurrentActivitiesWaiting );
for( const auto& pActivity : maCurrentActivitiesReinsert )
pActivity->dequeued();
ActivityQueue().swap( maCurrentActivitiesReinsert );
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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