source: rtems/cpukit/posix/src/sched_rr_get_interval.c @ be1b8a7

4.115
Last change on this file since be1b8a7 was 5cb175bb, checked in by Joel Sherrill <joel.sherrill@…>, on 01/10/13 at 19:22:31

cpukit/posix: Doxygen group is POSIXAPI

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File size: 1.0 KB
Line 
1/**
2 * @file
3 *
4 * @brief Limits for Scheduling Parameter
5 * @ingroup POSIXAPI
6 */
7
8/*
9 *  13.3.6 Get Scheduling Parameter Limits, P1003.1b-1993, p. 258
10 *
11 *  COPYRIGHT (c) 1989-2007.
12 *  On-Line Applications Research Corporation (OAR).
13 *
14 *  The license and distribution terms for this file may be
15 *  found in the file LICENSE in this distribution or at
16 *  http://www.rtems.com/license/LICENSE.
17 */
18
19#if HAVE_CONFIG_H
20#include "config.h"
21#endif
22
23#include <unistd.h> /* getpid */
24#include <sched.h>
25#include <errno.h>
26
27#include <rtems/system.h>
28#include <rtems/score/tod.h>
29#include <rtems/score/thread.h>
30#include <rtems/score/timespec.h>
31#include <rtems/seterr.h>
32
33int sched_rr_get_interval(
34  pid_t             pid,
35  struct timespec  *interval
36)
37{
38  /*
39   *  Only supported for the "calling process" (i.e. this node).
40   */
41
42  if ( pid && pid != getpid() )
43    rtems_set_errno_and_return_minus_one( ESRCH );
44
45  if ( !interval )
46    rtems_set_errno_and_return_minus_one( EINVAL );
47
48  _Timespec_From_ticks( _Thread_Ticks_per_timeslice, interval );
49  return 0;
50}
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