source: rtems/c/src/exec/posix/src/alarm.c @ 08311cc3

4.104.114.84.95
Last change on this file since 08311cc3 was 08311cc3, checked in by Joel Sherrill <joel.sherrill@…>, on Nov 17, 1999 at 5:51:34 PM

Updated copyright notice.

  • Property mode set to 100644
File size: 985 bytes
Line 
1/*
2 *  3.4.1 Schedule Alarm, P1003.1b-1993, p. 79
3 *
4 *  COPYRIGHT (c) 1989-1999.
5 *  On-Line Applications Research Corporation (OAR).
6 *
7 *  The license and distribution terms for this file may be
8 *  found in the file LICENSE in this distribution or at
9 *  http://www.OARcorp.com/rtems/license.html.
10 *
11 *  $Id$
12 */
13
14
15#include <pthread.h>
16#include <errno.h>
17
18#include <rtems/system.h>
19#include <rtems/posix/pthread.h>
20#include <rtems/posix/psignal.h>
21
22unsigned int alarm(
23  unsigned int seconds
24)
25{
26  unsigned int      remaining = 0;
27  Watchdog_Control *the_timer;
28
29  the_timer = &_POSIX_signals_Alarm_timer;
30
31  switch ( _Watchdog_Remove( the_timer ) ) {
32    case WATCHDOG_INACTIVE:
33    case WATCHDOG_BEING_INSERTED:
34      break;
35
36    case WATCHDOG_ACTIVE:
37    case WATCHDOG_REMOVE_IT:
38      remaining = the_timer->initial -
39                  (the_timer->stop_time - the_timer->start_time);
40      break;
41  }
42
43  _Watchdog_Insert_seconds( the_timer, seconds );
44
45  return remaining;
46}
47
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