forked from Imagelibrary/rtems
8fa4549eb2
This simplifies the CLOCK_MONOTONIC based time services. It is potentially important for libbsd. Close #3265.
67 lines
1.2 KiB
C
67 lines
1.2 KiB
C
/**
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* @file
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*
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* @brief Retrieves the Specified Clock Time
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* @ingroup POSIXAPI
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*/
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/*
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* COPYRIGHT (c) 1989-2007.
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* On-Line Applications Research Corporation (OAR).
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rtems.org/license/LICENSE.
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*/
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#if HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <time.h>
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#include <errno.h>
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#include <rtems/score/todimpl.h>
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#include <rtems/seterr.h>
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/*
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* 14.2.1 Clocks, P1003.1b-1993, p. 263
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*/
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int clock_gettime(
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clockid_t clock_id,
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struct timespec *tp
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)
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{
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if ( !tp )
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rtems_set_errno_and_return_minus_one( EINVAL );
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if ( clock_id == CLOCK_REALTIME ) {
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_TOD_Get(tp);
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return 0;
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}
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#ifdef CLOCK_MONOTONIC
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if ( clock_id == CLOCK_MONOTONIC ) {
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_Timecounter_Nanouptime( tp );
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return 0;
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}
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#endif
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#ifdef _POSIX_CPUTIME
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if ( clock_id == CLOCK_PROCESS_CPUTIME_ID ) {
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_Timecounter_Nanouptime( tp );
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return 0;
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}
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#endif
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#ifdef _POSIX_THREAD_CPUTIME
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if ( clock_id == CLOCK_THREAD_CPUTIME_ID )
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rtems_set_errno_and_return_minus_one( ENOSYS );
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#endif
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rtems_set_errno_and_return_minus_one( EINVAL );
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return 0;
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}
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