rtems/src/taskwakeafter.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  * @file
0005  *
0006  * @ingroup RTEMSImplClassicTask
0007  *
0008  * @brief This source file contains the implementation of
0009  *   rtems_task_wake_after().
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/tasks.h>
0043 #include <rtems/score/threadimpl.h>
0044 #include <rtems/score/watchdogimpl.h>
0045
0046 rtems_status_code rtems_task_wake_after(
0047   rtems_interval ticks
0048 )
0049 {
0050   /*
0051    * It is critical to obtain the executing thread after thread dispatching is
0052    * disabled on SMP configurations.
0053    */
0054   Thread_Control  *executing;
0055   Per_CPU_Control *cpu_self;
0056
0057   cpu_self = _Thread_Dispatch_disable();
0058     executing = _Per_CPU_Get_executing( cpu_self );
0059
0060     if ( ticks == 0 ) {
0061       _Thread_Yield( executing );
0062     } else {
0063       _Thread_Set_state( executing, STATES_WAITING_FOR_TIME );
0064       _Thread_Wait_flags_set( executing, THREAD_WAIT_STATE_BLOCKED );
0065       _Thread_Add_timeout_ticks( executing, cpu_self, ticks );
0066     }
0067   _Thread_Dispatch_direct( cpu_self );
0068   return RTEMS_SUCCESSFUL;
0069 }