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/* -*- C++ -*-
This file implements the ResourceRestrictionPolicy class.
$ Author: Mirko Boehm $
$ Copyright: (C) 2004-2013 Mirko Boehm $
$ Contact: mirko@kde.org
http://www.kde.org
http://creative-destruction.me $
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
$Id: Job.h 32 2005-08-17 08:38:01Z mirko $
*/
#include "resourcerestrictionpolicy.h"
#include <QList>
#include <QMutex>
#include "debuggingaids.h"
#include "managedjobpointer.h"
using namespace ThreadWeaver;
class Q_DECL_HIDDEN ResourceRestrictionPolicy::Private
{
public:
Private(int theCap)
: cap(theCap)
{}
QMutex *mutex()
{
return &mutex_;
}
int cap;
QList<JobPointer> customers;
QMutex mutex_;
};
ResourceRestrictionPolicy::ResourceRestrictionPolicy(int cap)
: QueuePolicy()
, d(new Private(cap))
{
}
ResourceRestrictionPolicy::~ResourceRestrictionPolicy()
{
delete d;
}
void ResourceRestrictionPolicy::setCap(int cap)
{
QMutexLocker l(d->mutex());
d->cap = cap;
}
int ResourceRestrictionPolicy::cap() const
{
QMutexLocker l(d->mutex());
return d->cap;
}
bool ResourceRestrictionPolicy::canRun(JobPointer job)
{
QMutexLocker l(d->mutex());
if (d->customers.size() < d->cap) {
d->customers.append(job);
TWDEBUG(4, "ResourceRestrictionPolicy::canRun: job %p added, %i customers (cap %i).\n",
(void *)job.data(), d->customers.count(), d->cap);
return true;
} else {
return false;
}
}
void ResourceRestrictionPolicy::free(JobPointer job)
{
QMutexLocker l(d->mutex());
int position = d->customers.indexOf(job);
if (position != -1) {
d->customers.removeAt(position);
TWDEBUG(4, "ResourceRestrictionPolicy::free: job %p completed, %i customers (cap %i).\n",
(void *)job.data(), d->customers.count(), d->cap);
}
}
void ResourceRestrictionPolicy::release(JobPointer job)
{
free(job);
}
void ResourceRestrictionPolicy::destructed(JobInterface *job)
{
free(ManagedJobPointer<JobInterface>(job));
}
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