libtests/cpuuse/tswitch.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /*  Task_switch
0004  *
0005  *  This routine is the tswitch user extension.  It determines which
0006  *  task is being switched to and displays a message indicating the
0007  *  time and date that it gained control.
0008  *
0009  *  Input parameters:
0010  *    unused  - pointer to currently running TCB
0011  *    heir    - pointer to heir TCB
0012  *
0013  *  Output parameters:  NONE
0014  *
0015  *  COPYRIGHT (c) 1989-2009.
0016  *  On-Line Applications Research Corporation (OAR).
0017  *
0018  * Redistribution and use in source and binary forms, with or without
0019  * modification, are permitted provided that the following conditions
0020  * are met:
0021  * 1. Redistributions of source code must retain the above copyright
0022  *    notice, this list of conditions and the following disclaimer.
0023  * 2. Redistributions in binary form must reproduce the above copyright
0024  *    notice, this list of conditions and the following disclaimer in the
0025  *    documentation and/or other materials provided with the distribution.
0026  *
0027  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0028  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0029  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0030  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0031  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0032  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0033  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0034  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0035  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0036  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0037  * POSSIBILITY OF SUCH DAMAGE.
0038  */
0039
0040 #ifdef HAVE_CONFIG_H
0041 #include "config.h"
0042 #endif
0043
0044 #include "system.h"
0045
0046 /*
0047  *  Only require 8 task switches on sis/gdb.  --joel 2 Feb 2011
0048  */
0049 struct taskSwitchLog taskSwitchLog[25];
0050 int taskSwitchLogIndex;
0051 volatile int testsFinished;
0052
0053 void Task_switch(
0054   rtems_tcb *unused,
0055   rtems_tcb *heir
0056 )
0057 {
0058   uint32_t    index;
0059   rtems_time_of_day time;
0060   rtems_status_code status;
0061
0062   index = task_number( heir->Object.id );
0063
0064   switch( index ) {
0065     case 1:
0066     case 2:
0067     case 3:
0068       Run_count[ index ] += 1;
0069
0070       status = rtems_clock_get_tod( &time );
0071       fatal_directive_check_status_only( status, RTEMS_SUCCESSFUL,
0072                                          "rtems_clock_get_tod" );
0073
0074       if (taskSwitchLogIndex <
0075           (sizeof taskSwitchLog / sizeof taskSwitchLog[0])) {
0076         taskSwitchLog[taskSwitchLogIndex].taskIndex = index;
0077         taskSwitchLog[taskSwitchLogIndex].when = time;
0078         taskSwitchLogIndex++;
0079       }
0080       if ( time.second >= 16 )
0081         testsFinished = 1;
0082
0083       break;
0084
0085     case 0:
0086     default:
0087       break;
0088   }
0089 }
0090