source:
rtems/cpukit/posix/src/clockgetres.c
@
3d66dfc1
Last change on this file since 3d66dfc1 was 3d66dfc1, checked in by Joel Sherrill <joel.sherrill@…>, on 12/16/08 at 17:36:01 | |
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File size: 1.2 KB |
Rev | Line | |
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[9f95a19] | 1 | /* |
2 | * $Id$ | |
3 | */ | |
4 | ||
[412dbff6] | 5 | /* |
6 | * COPYRIGHT (c) 1989-2007. | |
7 | * On-Line Applications Research Corporation (OAR). | |
8 | * | |
9 | * The license and distribution terms for this file may be | |
10 | * found in the file LICENSE in this distribution or at | |
11 | * http://www.rtems.com/license/LICENSE. | |
12 | * | |
13 | * $Id$ | |
14 | */ | |
15 | ||
[f42b726] | 16 | #if HAVE_CONFIG_H |
17 | #include "config.h" | |
18 | #endif | |
19 | ||
[9f95a19] | 20 | #include <time.h> |
21 | #include <errno.h> | |
22 | ||
23 | #include <rtems/system.h> | |
[3d66dfc1] | 24 | #include <rtems/config.h> |
[9f95a19] | 25 | #include <rtems/score/isr.h> |
26 | #include <rtems/score/thread.h> | |
27 | #include <rtems/score/tod.h> | |
28 | ||
[188c82b] | 29 | #include <rtems/seterr.h> |
[9f95a19] | 30 | #include <rtems/posix/time.h> |
31 | ||
32 | /*PAGE | |
33 | * | |
34 | * 14.2.1 Clocks, P1003.1b-1993, p. 263 | |
35 | */ | |
36 | ||
37 | int clock_getres( | |
38 | clockid_t clock_id, | |
39 | struct timespec *res | |
40 | ) | |
41 | { | |
42 | if ( !res ) | |
[e180a77e] | 43 | rtems_set_errno_and_return_minus_one( EINVAL ); |
[874297f3] | 44 | |
[9f95a19] | 45 | switch ( clock_id ) { |
[874297f3] | 46 | |
[9f95a19] | 47 | /* |
48 | * All time in rtems is based on the same clock tick. | |
49 | */ | |
50 | ||
51 | case CLOCK_REALTIME: | |
52 | case CLOCK_PROCESS_CPUTIME: | |
53 | case CLOCK_THREAD_CPUTIME: | |
[a93baa43] | 54 | if ( res ) { |
[3d66dfc1] | 55 | res->tv_sec = rtems_configuration_get_microseconds_per_tick() / |
56 | TOD_MICROSECONDS_PER_SECOND; | |
57 | res->tv_nsec = rtems_configuration_get_nanoseconds_per_tick(); | |
[a93baa43] | 58 | } |
[9f95a19] | 59 | break; |
[874297f3] | 60 | |
[9f95a19] | 61 | default: |
[e180a77e] | 62 | rtems_set_errno_and_return_minus_one( EINVAL ); |
[874297f3] | 63 | |
[9f95a19] | 64 | } |
65 | return 0; | |
66 | } |
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