rtems/src/clockset.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  * @file
0005  *
0006  * @ingroup RTEMSImplClassicClock
0007  *
0008  * @brief This source file contains the implementation of
0009  *   rtems_clock_set().
0010  */
0011
0012 /*
0013  *  COPYRIGHT (c) 1989-1999.
0014  *  On-Line Applications Research Corporation (OAR).
0015  *
0016  * Redistribution and use in source and binary forms, with or without
0017  * modification, are permitted provided that the following conditions
0018  * are met:
0019  * 1. Redistributions of source code must retain the above copyright
0020  *    notice, this list of conditions and the following disclaimer.
0021  * 2. Redistributions in binary form must reproduce the above copyright
0022  *    notice, this list of conditions and the following disclaimer in the
0023  *    documentation and/or other materials provided with the distribution.
0024  *
0025  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0026  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0027  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0028  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0029  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0030  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0031  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0032  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0033  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0034  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0035  * POSSIBILITY OF SUCH DAMAGE.
0036  */
0037
0038 #ifdef HAVE_CONFIG_H
0039 #include "config.h"
0040 #endif
0041
0042 #include <rtems/rtems/clockimpl.h>
0043 #include <rtems/rtems/statusimpl.h>
0044 #include <rtems/score/todimpl.h>
0045 #include <rtems/config.h>
0046
0047 rtems_status_code rtems_clock_set(
0048   const rtems_time_of_day *tod
0049 )
0050 {
0051   rtems_status_code status;
0052   Status_Control    score_status;
0053   struct timespec   tod_as_timespec;
0054   ISR_lock_Context  lock_context;
0055
0056   status = _TOD_Validate( tod, TOD_ENABLE_TICKS_VALIDATION );
0057
0058   if ( status != RTEMS_SUCCESSFUL ) {
0059     return status;
0060   }
0061
0062   tod_as_timespec.tv_sec = _TOD_To_seconds( tod );
0063   tod_as_timespec.tv_nsec = tod->ticks
0064     * rtems_configuration_get_nanoseconds_per_tick();
0065
0066   _TOD_Lock();
0067   _TOD_Acquire( &lock_context );
0068   score_status = _TOD_Set( &tod_as_timespec, &lock_context );
0069   _TOD_Unlock();
0070
0071   return _Status_Get( score_status );
0072 }