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/*-*-c++-*-
* $Id$
*
* This file is part of plptools.
*
* Copyright (C) 1999 Philip Proudman <philip.proudman@btinternet.com>
* Copyright (C) 1999-2001 Fritz Elfert <felfert@to.com>
*
* 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 _IOWATCH_H_
#define _IOWATCH_H_
/**
* A simple wrapper for select()
*
* IOWatch is a simple wrapper for the select
* system call. In particular, it takes care
* of passing the maximum file descriptor
* argument (arg 1) of select() correctly.
* IOWatch handles select on read descriptors only.
*/
class IOWatch {
public:
/**
* Creates a new instance.
*/
IOWatch();
/**
* Destroys an instance.
*/
~IOWatch();
/**
* Adds a file descriptor to
* the set of descriptors.
*
* @param fd The file descriptor to add.
*/
void addIO(const int fd);
/**
* Removes a file descriptor from the
* set of descriptors.
*
* @param fd The file descriptor to remove.
*/
void remIO(const int fd);
/**
* Performs a select() call.
*
* @param secs Number of seconds to wait.
* @param usecs Number of microseconds to wait.
*
* @return true, if any of the descriptors is
* readable.
*/
bool watch(const long secs, const long usecs);
private:
int num;
int *io;
};
#endif
/*
* Local variables:
* c-basic-offset: 4
* End:
*/
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