Chris@1729: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
Chris@1729: 
Chris@1729: /*
Chris@1729:     Sonic Visualiser
Chris@1729:     An audio file viewer and annotation editor.
Chris@1729:     Centre for Digital Music, Queen Mary, University of London.
Chris@1729:     
Chris@1729:     This program is free software; you can redistribute it and/or
Chris@1729:     modify it under the terms of the GNU General Public License as
Chris@1729:     published by the Free Software Foundation; either version 2 of the
Chris@1729:     License, or (at your option) any later version.  See the file
Chris@1729:     COPYING included with this distribution for more information.
Chris@1729: */
Chris@1729: 
Chris@1729: #include "ById.h"
Chris@1729: 
Chris@1729: #include <QMutex>
Chris@1729: 
Chris@1729: #include <climits>
Chris@1729: 
Chris@1729: int
Chris@1729: WithId::getNextId()
Chris@1729: {
Chris@1729:     static int nextId = 0;
Chris@1729:     static QMutex mutex;
Chris@1729:     QMutexLocker locker(&mutex);
Chris@1729:     int i = nextId;
Chris@1729:     if (nextId == INT_MAX) {
Chris@1729:         nextId = INT_MIN;
Chris@1729:     }
Chris@1729:     ++nextId;
Chris@1729:     return i;
Chris@1729: }