psxtmtests/psxtmsem05/init.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /*
0004  *  COPYRIGHT (c) 1989-2013.
0005  *  On-Line Applications Research Corporation (OAR).
0006  *
0007  * Redistribution and use in source and binary forms, with or without
0008  * modification, are permitted provided that the following conditions
0009  * are met:
0010  * 1. Redistributions of source code must retain the above copyright
0011  *    notice, this list of conditions and the following disclaimer.
0012  * 2. Redistributions in binary form must reproduce the above copyright
0013  *    notice, this list of conditions and the following disclaimer in the
0014  *    documentation and/or other materials provided with the distribution.
0015  *
0016  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0017  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0018  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0019  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0020  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0021  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0022  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0023  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0024  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0025  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0026  * POSSIBILITY OF SUCH DAMAGE.
0027  */
0028
0029 #ifdef HAVE_CONFIG_H
0030 #include "config.h"
0031 #endif
0032
0033 #include <errno.h>
0034 #include <fcntl.h>
0035 #include <semaphore.h>
0036 #include <tmacros.h>
0037 #include <timesys.h>
0038 #include "test_support.h"
0039 #include <pthread.h>
0040 #include <sched.h>
0041 #include <rtems/btimer.h>
0042
0043 const char rtems_test_name[] = "PSXTMSEM 05";
0044
0045 /* forward declarations to avoid warnings */
0046 void *POSIX_Init(void *argument);
0047 void *Middle(void *argument);
0048 void *Low(void *argument);
0049
0050 #define MAX_SEMS  2
0051
0052 sem_t   sem1;
0053
0054 void *Low(
0055   void *argument
0056 )
0057 {
0058   int      status;
0059   benchmark_timer_t end_time;
0060
0061     status = sem_wait(&sem1); /* semaphore blocks */
0062   end_time = benchmark_timer_read();
0063
0064   rtems_test_assert( status == 0 );
0065
0066   put_time(
0067     "sem_post: thread waiting preempt",
0068     end_time,
0069     OPERATION_COUNT,
0070     0,
0071     0
0072   );
0073
0074   TEST_END();
0075   rtems_test_exit( 0 );
0076   return NULL;
0077 }
0078
0079 void *Middle(
0080   void *argument
0081 )
0082 {
0083   int status;
0084
0085     status = sem_wait(&sem1); /* semaphore blocks */
0086   rtems_test_assert( status == 0 );
0087
0088     /* thread switch occurs */
0089
0090     status = sem_post(&sem1);
0091   rtems_test_assert( status == 0 );
0092
0093     /* thread switch occurs */
0094
0095   /* should never return */
0096   rtems_test_assert( FALSE );
0097   return NULL;
0098 }
0099
0100 void *POSIX_Init(
0101   void *argument
0102 )
0103 {
0104   int                 i;
0105   int                 status;
0106   pthread_t           threadId;
0107   pthread_attr_t      attr;
0108   struct sched_param  param;
0109
0110   TEST_BEGIN();
0111
0112   /*
0113    * Deliberately create the semaphore BEFORE the threads.  This way the
0114    * threads should preempt this thread and block as they are created.
0115    */
0116   status = sem_init( &sem1, 0, 1 );
0117   rtems_test_assert( status == 0 );
0118
0119   /*
0120    * Obtain the semaphore so the threads will block.
0121    */
0122   status = sem_wait( &sem1 );
0123   rtems_test_assert( status == 0 );
0124
0125   /*
0126    * Now lower our priority
0127    */
0128   status = pthread_attr_init( &attr );
0129   rtems_test_assert( status == 0 );
0130
0131   status = pthread_attr_setinheritsched( &attr, PTHREAD_EXPLICIT_SCHED );
0132   rtems_test_assert( status == 0 );
0133
0134   status = pthread_attr_setschedpolicy( &attr, SCHED_RR );
0135   rtems_test_assert( status == 0 );
0136
0137   param.sched_priority = 2;
0138   status = pthread_attr_setschedparam( &attr, &param );
0139   rtems_test_assert( status == 0 );
0140
0141   /*
0142    * And create rest of threads as more important than we are.  They
0143    * will preempt us as they are created and block.
0144    */
0145   for ( i=0 ; i < OPERATION_COUNT ; i++ ) {
0146
0147     param.sched_priority = 3 + i;
0148     status = pthread_attr_setschedparam( &attr, &param );
0149     rtems_test_assert( status == 0 );
0150
0151     status = pthread_create(
0152       &threadId,
0153       &attr,
0154       (i == OPERATION_COUNT - 1) ? Low : Middle,
0155       NULL
0156     );
0157     rtems_test_assert( status == 0 );
0158   }
0159
0160   /*
0161    * Now start the timer which will be stopped in Low.
0162    * Release the semaphore so threads unblock and preempt.
0163    */
0164   benchmark_timer_initialize();
0165
0166     status = sem_post( &sem1 );
0167       /* thread switch occurs */
0168
0169   /* should never return */
0170   rtems_test_assert( FALSE );
0171   return NULL;
0172 }
0173
0174 /* configuration information */
0175
0176 #define CONFIGURE_APPLICATION_NEEDS_SIMPLE_CONSOLE_DRIVER
0177 #define CONFIGURE_APPLICATION_NEEDS_TIMER_DRIVER
0178
0179 #define CONFIGURE_MAXIMUM_POSIX_THREADS     OPERATION_COUNT + 2
0180 #define CONFIGURE_POSIX_INIT_THREAD_TABLE
0181
0182 #define CONFIGURE_INIT
0183
0184 #include <rtems/confdefs.h>
0185   /* end of file */