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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 <tools/TimerBasedTaskExecution.hxx>
#include <tools/AsynchronousTask.hxx>
#include <tools/time.hxx>
#include <sal/log.hxx>
#include <memory>
#include <utility>
namespace sd::tools {
/** Used by the shared_ptr instead of the private destructor.
*/
class TimerBasedTaskExecution::Deleter
{
public:
void operator() (TimerBasedTaskExecution* pObject)
{
delete pObject;
}
};
std::shared_ptr<TimerBasedTaskExecution> TimerBasedTaskExecution::Create (
const std::shared_ptr<AsynchronousTask>& rpTask,
sal_uInt32 nMillisecondsBetweenSteps,
sal_uInt32 nMaxTimePerStep)
{
std::shared_ptr<TimerBasedTaskExecution> pExecution(
new TimerBasedTaskExecution(rpTask,nMillisecondsBetweenSteps,nMaxTimePerStep),
Deleter());
// Let the new object have a shared_ptr to itself, so that it can
// release itself when the AsynchronousTask has been executed
// completely.
if (pExecution->mpTask != nullptr)
pExecution->mpSelf = pExecution;
return pExecution;
}
void TimerBasedTaskExecution::Release()
{
maTimer.Stop();
mpSelf.reset();
}
//static
void TimerBasedTaskExecution::ReleaseTask (
const std::weak_ptr<TimerBasedTaskExecution>& rpExecution)
{
if ( rpExecution.expired())
return;
try
{
std::shared_ptr<tools::TimerBasedTaskExecution> pExecution (rpExecution);
pExecution->Release();
}
catch (const std::bad_weak_ptr&)
{
// When a bad_weak_ptr has been thrown then the object pointed
// to by rpTask has been released right after we checked that it
// still existed. Too bad, but that means, that we have nothing
// more do.
}
}
TimerBasedTaskExecution::TimerBasedTaskExecution (
std::shared_ptr<AsynchronousTask> pTask,
sal_uInt32 nMillisecondsBetweenSteps,
sal_uInt32 nMaxTimePerStep)
: mpTask(std::move(pTask)),
maTimer("sd TimerBasedTaskExecution maTimer"),
mnMaxTimePerStep(nMaxTimePerStep)
{
maTimer.SetInvokeHandler( LINK(this,TimerBasedTaskExecution,TimerCallback) );
maTimer.SetTimeout(nMillisecondsBetweenSteps);
maTimer.Start();
}
TimerBasedTaskExecution::~TimerBasedTaskExecution()
{
maTimer.Stop();
}
IMPL_LINK_NOARG(TimerBasedTaskExecution, TimerCallback, Timer *, void)
{
if (mpTask == nullptr)
return;
if (mpTask->HasNextStep())
{
// Execute as many steps as fit into the time span of length
// mnMaxTimePerStep. Note that the last step may take longer
// than allowed.
sal_uInt32 nStartTime (::tools::Time( ::tools::Time::SYSTEM ).GetMSFromTime());
SAL_INFO("sd.tools", __func__ << ": starting TimerBasedTaskExecution at " << nStartTime);
do
{
mpTask->RunNextStep();
sal_uInt32 nDuration (::tools::Time( ::tools::Time::SYSTEM ).GetMSFromTime()-nStartTime);
SAL_INFO("sd.tools", __func__ << ": executed step in " << nDuration);
if (nDuration > mnMaxTimePerStep)
break;
}
while (mpTask->HasNextStep());
SAL_INFO("sd.tools", __func__ << ": TimerBasedTaskExecution sleeping");
maTimer.Start();
}
else
mpSelf.reset();
}
} // end of namespace ::sd::tools
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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