source: rtems/cpukit/libcsupport/src/getrusage.c @ c499856

4.115
Last change on this file since c499856 was c499856, checked in by Chris Johns <chrisj@…>, on Mar 20, 2014 at 9:10:47 PM

Change all references of rtems.com to rtems.org.

  • Property mode set to 100644
File size: 1.2 KB
Line 
1/*
2 *  COPYRIGHT (c) 1989-2010.
3 *  On-Line Applications Research Corporation (OAR).
4 *
5 *  The license and distribution terms for this file may be
6 *  found in the file LICENSE in this distribution or at
7 *  http://www.rtems.org/license/LICENSE.
8 */
9
10#if HAVE_CONFIG_H
11#include "config.h"
12#endif
13
14#include <sys/resource.h>
15#include <errno.h>
16
17#include <rtems.h>
18#include <rtems/seterr.h>
19
20#if !HAVE_DECL_GETRUSAGE
21extern int getrusage(int who, struct rusage *usage);
22#endif
23
24int getrusage(int who, struct rusage *usage)
25{
26  struct timespec uptime;
27  struct timeval  rtime;
28
29  if ( !usage )
30    rtems_set_errno_and_return_minus_one( EFAULT );
31
32  /*
33   *  RTEMS only has a single process so there are no children.
34   *  The single process has been running since the system
35   *  was booted and since there is no distinction between system
36   *  and user time, we will just report the uptime.
37   */
38  if (who == RUSAGE_SELF) {
39    rtems_clock_get_uptime( &uptime );
40
41    rtime.tv_sec  = uptime.tv_sec;
42    rtime.tv_usec = uptime.tv_nsec / 1000;
43
44    usage->ru_utime = rtime;
45    usage->ru_stime = rtime;
46
47    return 0;
48  }
49
50  if (who == RUSAGE_CHILDREN) {
51    rtems_set_errno_and_return_minus_one( ENOSYS );
52  }
53
54  rtems_set_errno_and_return_minus_one( EINVAL );
55}
56
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