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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [lib/] [libc/] [__gettod.c] - Blame information for rev 596

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1 30 unneback
/*
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 *  gettimeofday() - SVR4 and BSD4.3 extension required by Newlib
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 *
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 *  COPYRIGHT (c) 1989-1999.
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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.OARcorp.com/rtems/license.html.
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 *
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 *  $Id: __gettod.c,v 1.2 2001-09-27 12:01:15 chris Exp $
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 */
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#define __RTEMS_VIOLATE_KERNEL_VISIBILITY__
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#include <rtems.h>
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#if !defined(RTEMS_UNIX)
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#ifdef RTEMS_NEWLIB
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#include <sys/reent.h>
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#endif
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#include <sys/time.h>
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#include <time.h>
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#include <errno.h>
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#include <assert.h>
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/*
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 *  Seconds from January 1, 1970 to January 1, 1988.  Used to account for
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 *  differences between POSIX API and RTEMS core.
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 */
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#define POSIX_TIME_SECONDS_1970_THROUGH_1988 \
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  (((1987 - 1970 + 1)  * TOD_SECONDS_PER_NON_LEAP_YEAR) + \
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  (4 * TOD_SECONDS_PER_DAY))
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/*
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 *  NOTE:  The solaris gettimeofday does not have a second parameter.
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 */
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int gettimeofday(
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  struct timeval  *tp,
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  struct timezone *tzp
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)
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{
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  rtems_interrupt_level level;
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  rtems_unsigned32      seconds;
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  rtems_unsigned32      microseconds;
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  if ( !tp ) {
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    errno = EFAULT;
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    return -1;
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  }
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  /*
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   *  POSIX does not seem to allow for not having a TOD so we just
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   *  grab the time of day.
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   *
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   *  NOTE: XXX this routine should really be in the executive proper.
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   */
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  rtems_interrupt_disable(level);
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    seconds      = _TOD_Seconds_since_epoch;
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    microseconds = _TOD_Current.ticks;
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  rtems_interrupt_enable(level);
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  tp->tv_sec  = seconds + POSIX_TIME_SECONDS_1970_THROUGH_1988;
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  tp->tv_usec = microseconds * _TOD_Microseconds_per_tick;
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  /*
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   * newlib does not have timezone and daylight savings time
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   * yet.  When it does this needs to be fixed.
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   */
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#if 0
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  if ( tzp ) {
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    tzp->tz_minuteswest = 0;  /* at UTC */
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    tzp->tz_dsttime = 0;      /* no daylight savings */
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  tzp->minuteswest = timezone / 60; /* from seconds to minutes */
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  tzp->dsttime = daylight;
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  }
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#endif
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  return 0;
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}
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#if defined(RTEMS_NEWLIB)
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/*
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 *  "Reentrant" version
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 */
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int _gettimeofday_r(
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  struct _reent   *ignored_reentrancy_stuff,
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  struct timeval  *tp,
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  struct timezone *tzp
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)
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{
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  return gettimeofday( tp, tzp );
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}
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/*
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 *  "System call" version
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 */
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int _gettimeofday(
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  struct timeval  *tp,
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  struct timezone *tzp
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)
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{
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  return gettimeofday( tp, tzp );
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}
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#endif /* defined(RTEMS_NEWLIB) */
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#endif

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