/******************************************************************************
*
*  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 1, 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*  Please report any bugs you find in this code or any improvements to:
*
*  Hans Hedbom, Dept. of Computer Science,
*  University of Karlstad, Sweden.
*
*  Phone: +46 54 838157
*  E-mail: Hans.Hedbom@hks.se
* 
*  ============================================================================
*
*  FILE:
*
*  uselect.h [ the Data Communication I course programming project ]
*
*  AUTHORS:
*
*  Jonny Wiederholm
*  E-mail: fr7wied@cse.hks.se or
*          jonnwied@hks.se
*
*  Per-Ola Gustafsson
*  E-mail: fr7gust@cse.hks.se
*
*  CREATION DATE: 
*
*  Jan, 06, 1998
*
*  DESCRIPTION:
*
*  Includes types and declarations of functions needed to poll sockets in the
*  example implementation of the Data Communication I course programming
*  project.
*
*  MODIFICATIONS:   Date    Changes
*  ----------------------------------------------------------------------------
*
*/

#ifndef _USELECT_H    /* Avoid multiple copies of this file. */
#define _USELECT_H

#ifdef __cplusplus    /* Make this file possible to use in C++ code. */
extern "C" {
#endif

/******************************************************************************
*  INCLUDE FILES
*/

#include "systems.h"

/******************************************************************************
*  DEFINE TYPES
*/

/* Type representing part of a time peroid. */
#if defined (__linux__) || defined (_AIX)
typedef int   time_p_;
#elif defined(sun)
typedef long  time_p_;
#endif                  /* defined (__linux__) || defined (_AIX) */

/* Structure representing a timeout time period. */
struct timeout {
  time_p_  tv_sec;   /* Seconds. */
  time_p_  tv_usec;  /* Microseconds. */
};

/******************************************************************************
*  DECLARE FUNCTIONS
*/

/* See function definitions for documentation. */

extern struct timeout *SetPollTimeout __P((time_p_ seconds, time_p_ \
					   microseconds));
extern int PollSocket __P((int sockfd1, int sockfd2, struct timeout *to));

/******************************************************************************
*  END
*/

#ifdef __cplusplus
}
#endif

#endif                  /* _USELECT_H */