/***************************************************************************
* Copyright (C) 2006 by Ilya Kotov *
* forkotov02@hotmail.ru *
* *
* 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. *
* *
* This program 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 General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#include "guard.h"
//#define USE_SEMAPHORE
#ifdef USE_SEMAPHORE
#include <sys/types.h>
#include <sys/ipc.h>
#include <errno.h>
#include <sys/sem.h>
#else
#include <QSettings>
#endif
#include <QDir>
bool Guard::create(const QString& filepath)
{
#ifdef USE_SEMAPHORE
key_t key;
int sem_num = 1;
if( (key = ftok(filepath.toAscii().data(),'A')) < 0)
{
qWarning("Warning: Unable get access to key...");
return false;
}
if(semget(key,sem_num,IPC_CREAT | IPC_EXCL ) < 0)
{
if(errno == EEXIST)
{
qWarning("Warning: Semaphore with %d key already exists...",key);
}
return false;
}
return true;
#else
Q_UNUSED(filepath)
QSettings settings(QDir::homePath()+"/.qmmp/qmmprc", QSettings::IniFormat);
settings.beginGroup("Application");
settings.setValue("IS_RUNNING",TRUE);
settings.endGroup();
return true;
#endif
}
bool Guard::exists(const QString& filepath)
{
#ifdef USE_SEMAPHORE
key_t key;
int sem_num = 1;
int sem_id;
if( (key = ftok(filepath.toAscii().data(),'A')) < 0)
{
qWarning("Warning: Unable get access to key");
return false;
}
if( (sem_id = semget(key,sem_num,0)) < 0 )
return false;
return true;
#else
Q_UNUSED(filepath)
QSettings settings(QDir::homePath()+"/.qmmp/qmmprc", QSettings::IniFormat);
settings.beginGroup("Application");
bool res = settings.value("IS_RUNNING",FALSE).toBool();
settings.endGroup();
return res;
#endif
}
bool Guard::destroy(const QString& filepath)
{
#ifdef USE_SEMAPHORE
key_t key;
int sem_num = 1;
int sem_id;
if( (key = ftok(filepath.toAscii().data(),'A')) < 0)
{
qWarning("Warning: Unable get access to key");
return false;
}
if( (sem_id = semget(key,sem_num,0)) < 0 )
{
qWarning("Unable get semaphore with key %d",key);
return false;
}
if(semctl(sem_id,1,IPC_RMID) < 0)
{
qWarning("Unable remove semaphore with key %d",key);
return false;
}
return true;
#else
Q_UNUSED(filepath)
QSettings settings(QDir::homePath()+"/.qmmp/qmmprc", QSettings::IniFormat);
settings.beginGroup("Application");
settings.setValue("IS_RUNNING",FALSE);
settings.endGroup();
return true;
#endif
}
