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/*
* Copyright 2005-2021 Fabrice Colin
*
* 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.
*/
#ifndef _MONITOR_INTERFACE_H
#define _MONITOR_INTERFACE_H
#include <string>
#include <map>
#include <queue>
#include "MonitorEvent.h"
/// Interface implemented by all monitors.
class MonitorInterface
{
public:
virtual ~MonitorInterface()
{
}
/// Returns the file descriptor to poll for events.
virtual int getFileDescriptor(void) const
{
return m_monitorFd;
}
/// Returns the maximum number of files that can be monitored.
virtual unsigned int getLimit(void) const = 0;
/// Adds a watch for the specified location.
virtual bool addLocation(const std::string &location, bool isDirectory) = 0;
/// Removes the watch for the specified location.
virtual bool removeLocation(const std::string &location) = 0;
/// Removes watches for the specified location and all underneath.
virtual bool removeLocations(const std::string &location) = 0;
/// Retrieves pending events.
virtual bool retrievePendingEvents(std::queue<MonitorEvent> &events) = 0;
/// Drops pending events.
virtual void dropPendingEvents(void) = 0;
protected:
std::map<int, std::string> m_watches;
int m_monitorFd;
MonitorInterface() :
m_monitorFd(-1)
{
}
private:
MonitorInterface(const MonitorInterface &other);
MonitorInterface &operator=(const MonitorInterface &other);
};
#endif // _MONITOR_INTERFACE_H
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