Mercurial > hg > svcore
view base/Serialiser.cpp @ 942:0009b2b066e0
Merge
author | Chris Cannam |
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date | Wed, 02 Jul 2014 08:42:33 +0100 |
parents | d095214ffbaf |
children | 14c776dad920 |
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/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */ /* Sonic Visualiser An audio file viewer and annotation editor. Centre for Digital Music, Queen Mary, University of London. This file copyright 2007 QMUL. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. See the file COPYING included with this distribution for more information. */ #include "Serialiser.h" #include <iostream> QMutex Serialiser::m_mapMutex; std::map<QString, QMutex *> Serialiser::m_mutexMap; Serialiser::Serialiser(QString id) : m_id(id) { m_mapMutex.lock(); if (m_mutexMap.find(m_id) == m_mutexMap.end()) { m_mutexMap[m_id] = new QMutex; } // The id mutexes are never deleted, so once we have a reference // to the one we need, we can hold on to it while we release the // map mutex. We need to release the map mutex, otherwise if the // id mutex is currently held, it will never be released (because // the destructor needs to hold the map mutex to release the id // mutex). QMutex *idMutex = m_mutexMap[m_id]; m_mapMutex.unlock(); idMutex->lock(); } Serialiser::~Serialiser() { m_mapMutex.lock(); m_mutexMap[m_id]->unlock(); m_mapMutex.unlock(); }