psxtests/psx07/task.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /*  Task_1
0004  *
0005  *  This routine serves as a test task.  It verifies the basic task
0006  *  switching capabilities of the executive.
0007  *
0008  *  Input parameters:
0009  *    argument - task argument
0010  *
0011  *  Output parameters:  NONE
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 "system.h"
0043 #include <time.h>
0044 #include <sched.h>
0045
0046 void *Task_1(
0047   void *argument
0048 )
0049 {
0050   puts( "Task_1 - exitting" );
0051   pthread_exit( NULL );
0052
0053   return NULL; /* just so the compiler thinks we returned something */
0054 }
0055
0056 void *Task_2(
0057   void *argument
0058 )
0059 {
0060   int i = 0;
0061   time_t now, start;
0062
0063   /*
0064    * sleep long enough to let the init thread join with us.
0065    */
0066   usleep(10000);
0067
0068   /*
0069    *  Change our priority so we are running at a logically higher
0070    *  priority than our "ss_high_priority".  This should result in
0071    *  our replenishment period not touching our priority.
0072    */
0073
0074   /*
0075    *  Consume time so the cpu budget callout will run.
0076    *
0077    *  DO NOT BLOCK!!!
0078    */
0079   start = time(&start);
0080   while( i <= 10 ) {
0081     do {
0082       now = time(&now);
0083     } while (start == now);
0084     start = time(&start);
0085
0086     printf( "Time elapsed Task_2: %2d (seconds)\n", i++ );
0087   }
0088
0089   puts( "Task_2 - exitting" );
0090   pthread_exit( NULL );
0091   return NULL;
0092 }