source: rtems/cpukit/rtems/src/clockset.c

/* SPDX-License-Identifier: BSD-2-Clause */

/**
 * @file
 *
 * @ingroup RTEMSImplClassicClock
 *
 * @brief This source file contains the implementation of
 *   rtems_clock_set().
 */

/*
 *  COPYRIGHT (c) 1989-1999.
 *  On-Line Applications Research Corporation (OAR).
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <rtems/rtems/clockimpl.h>
#include <rtems/rtems/statusimpl.h>
#include <rtems/score/todimpl.h>
#include <rtems/config.h>

rtems_status_code rtems_clock_set(
  const rtems_time_of_day *tod
)
{
  rtems_status_code status;
  Status_Control    score_status;
  struct timespec   tod_as_timespec;
  ISR_lock_Context  lock_context;

  status = _TOD_Validate( tod, TOD_ENABLE_TICKS_VALIDATION );

  if ( status != RTEMS_SUCCESSFUL ) {
    return status;
  }

  tod_as_timespec.tv_sec = _TOD_To_seconds( tod );
  tod_as_timespec.tv_nsec = tod->ticks
    * rtems_configuration_get_nanoseconds_per_tick();

  _TOD_Lock();
  _TOD_Acquire( &lock_context );
  score_status = _TOD_Set( &tod_as_timespec, &lock_context );
  _TOD_Unlock();

  return _Status_Get( score_status );
}