rtems/src/systemeventreceive.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  * @file
0005  *
0006  * @ingroup RTEMSImplClassicEvent
0007  *
0008  * @brief This source file contains the implementation of
0009  *   rtems_event_system_receive().
0010  */
0011
0012 /*
0013  * Copyright (c) 2012 embedded brains GmbH & Co. KG
0014  *
0015  * Redistribution and use in source and binary forms, with or without
0016  * modification, are permitted provided that the following conditions
0017  * are met:
0018  * 1. Redistributions of source code must retain the above copyright
0019  *    notice, this list of conditions and the following disclaimer.
0020  * 2. Redistributions in binary form must reproduce the above copyright
0021  *    notice, this list of conditions and the following disclaimer in the
0022  *    documentation and/or other materials provided with the distribution.
0023  *
0024  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0025  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0026  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0027  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0028  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0029  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0030  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0031  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0032  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0033  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0034  * POSSIBILITY OF SUCH DAMAGE.
0035  */
0036
0037 #ifdef HAVE_CONFIG_H
0038 #include "config.h"
0039 #endif
0040
0041 #include <rtems/rtems/eventimpl.h>
0042 #include <rtems/rtems/tasksdata.h>
0043 #include <rtems/score/statesimpl.h>
0044 #include <rtems/score/threadimpl.h>
0045
0046 rtems_status_code rtems_event_system_receive(
0047   rtems_event_set  event_in,
0048   rtems_option     option_set,
0049   rtems_interval   ticks,
0050   rtems_event_set *event_out
0051 )
0052 {
0053   rtems_status_code sc;
0054
0055   if ( event_out != NULL ) {
0056     ISR_lock_Context   lock_context;
0057     Thread_Control    *executing;
0058     RTEMS_API_Control *api;
0059     Event_Control     *event;
0060
0061     executing = _Thread_Wait_acquire_default_for_executing( &lock_context );
0062     api = executing->API_Extensions[ THREAD_API_RTEMS ];
0063     event = &api->System_event;
0064
0065     if ( !_Event_sets_Is_empty( event_in ) ) {
0066       sc = _Event_Seize(
0067         event_in,
0068         option_set,
0069         ticks,
0070         event_out,
0071         executing,
0072         event,
0073         THREAD_WAIT_CLASS_SYSTEM_EVENT,
0074         STATES_WAITING_FOR_SYSTEM_EVENT,
0075         &lock_context
0076       );
0077     } else {
0078       *event_out = event->pending_events;
0079       _Thread_Wait_release_default( executing, &lock_context );
0080       sc = RTEMS_SUCCESSFUL;
0081     }
0082   } else {
0083     sc = RTEMS_INVALID_ADDRESS;
0084   }
0085
0086   return sc;
0087 }