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59 lines
1.8 KiB
C++
59 lines
1.8 KiB
C++
/*
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* This file is part of KDevelop
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*
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* Copyright 2007-2009 David Nolden <david.nolden.kdevelop@art-master.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Library General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "urlparselock.h"
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#include <QThread>
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#include <QHash>
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using namespace KDevelop;
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namespace
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{
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///Facilities to prevent multiple parse-jobs from processing the same url.
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QMutex urlParseMutex;
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QHash<IndexedString, QPair<QThread*, uint> > parsingUrls;
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}
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UrlParseLock::UrlParseLock(const IndexedString& url)
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: m_url(url)
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{
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QMutexLocker lock(&urlParseMutex);
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while(parsingUrls.contains(m_url) && parsingUrls[m_url].first != QThread::currentThread()) {
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//Wait here until no other thread is updating parsing the url
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lock.unlock();
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sleep(1);
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lock.relock();
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}
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if(parsingUrls.contains(m_url))
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++parsingUrls[m_url].second;
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else
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parsingUrls.insert(m_url, qMakePair(QThread::currentThread(), 1u));
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}
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UrlParseLock::~UrlParseLock()
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{
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QMutexLocker lock(&urlParseMutex);
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Q_ASSERT(parsingUrls.contains(m_url));
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Q_ASSERT(parsingUrls[m_url].first == QThread::currentThread());
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--parsingUrls[m_url].second;
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if(parsingUrls[m_url].second == 0)
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parsingUrls.remove(m_url);
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}
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