forked from Imagelibrary/rtems
227 lines
6.8 KiB
C
227 lines
6.8 KiB
C
/*
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* COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994.
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* On-Line Applications Research Corporation (OAR).
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* All rights assigned to U.S. Government, 1994.
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*
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* This material may be reproduced by or for the U.S. Government pursuant
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* to the copyright license under the clause at DFARS 252.227-7013. This
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* notice must appear in all copies of this file and its derivatives.
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*
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* $Id$
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*/
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#define CONFIGURE_INIT
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#include "system.h"
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#include <errno.h>
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void print_schedparam(
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char *prefix,
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struct sched_param *schedparam
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)
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{
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printf( "%ssched priority = %d\n", prefix, schedparam->sched_priority );
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#if defined(_POSIX_SPORADIC_SERVER)
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printf( "%sss_low_priority = %d\n", prefix, schedparam->ss_low_priority );
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printf( "%sss_replenish_period = (%ld, %ld)\n", prefix,
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schedparam->ss_replenish_period.tv_sec,
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schedparam->ss_replenish_period.tv_nsec );
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printf( "%sss_initial_budget = (%ld, %ld)\n", prefix,
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schedparam->ss_initial_budget.tv_sec,
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schedparam->ss_initial_budget.tv_nsec );
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#else
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printf( "%s_POSIX_SPORADIC_SERVER is not defined\n" );
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#endif
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}
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void *POSIX_Init(
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void *argument
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)
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{
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int status;
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int passes;
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int schedpolicy;
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int priority;
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struct sched_param schedparam;
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char buffer[ 80 ];
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pthread_mutexattr_t attr;
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puts( "\n\n*** POSIX TEST 9 ***" );
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/* set the time of day, and print our buffer in multiple ways */
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set_time( TM_FRIDAY, TM_MAY, 24, 96, 11, 5, 0 );
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/* get id of this thread */
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Init_id = pthread_self();
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printf( "Init's ID is 0x%08x\n", Init_id );
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/* try to use this thread as a sporadic server */
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puts( "Init: pthread_getschedparam - SUCCESSFUL" );
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status = pthread_getschedparam( pthread_self(), &schedpolicy, &schedparam );
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assert( !status );
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priority = schedparam.sched_priority;
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sprintf( buffer, " - current priority = %d", priority );
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print_current_time( "Init: ", buffer );
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schedparam.ss_replenish_period.tv_sec = 0;
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schedparam.ss_replenish_period.tv_nsec = 500000000; /* 1/2 second */
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schedparam.ss_initial_budget.tv_sec = 0;
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schedparam.ss_initial_budget.tv_nsec = 250000000; /* 1/4 second */
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schedparam.sched_priority = 200;
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schedparam.ss_low_priority = 100;
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puts( "Init: pthread_setschedparam - SUCCESSFUL (sporadic server)" );
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status = pthread_setschedparam( pthread_self(), SCHED_SPORADIC, &schedparam );
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assert( !status );
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status = pthread_getschedparam( pthread_self(), &schedpolicy, &schedparam );
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assert( !status );
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priority = schedparam.sched_priority;
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sprintf( buffer, " - new priority = %d", priority );
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print_current_time( "Init: ", buffer );
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/* go into a loop consuming CPU time to watch our priority change */
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for ( passes=0 ; passes <= 3 ; ) {
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status = pthread_getschedparam( pthread_self(), &schedpolicy, &schedparam );
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assert( !status );
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if ( priority != schedparam.sched_priority ) {
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priority = schedparam.sched_priority;
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sprintf( buffer, " - new priority = %d", priority );
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print_current_time( "Init: ", buffer );
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passes++;
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}
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}
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/* now see if this works if we are holding a priority ceiling mutex */
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empty_line();
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status = pthread_getschedparam( pthread_self(), &schedpolicy, &schedparam );
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assert( !status );
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schedparam.ss_replenish_period.tv_sec = 0;
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schedparam.ss_replenish_period.tv_nsec = 500000000; /* 1/2 second */
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schedparam.ss_initial_budget.tv_sec = 0;
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schedparam.ss_initial_budget.tv_nsec = 250000000; /* 1/4 second */
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#define HIGH_PRIORITY 150
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#define MEDIUM_PRIORITY 131
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#define LOW_PRIORITY 100
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schedparam.sched_priority = HIGH_PRIORITY;
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schedparam.ss_low_priority = LOW_PRIORITY;
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puts( "Init: pthread_setschedparam - SUCCESSFUL (sporadic server)" );
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status = pthread_setschedparam( pthread_self(), SCHED_SPORADIC, &schedparam );
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assert( !status );
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puts( "Init: Initializing mutex attributes for priority ceiling" );
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status = pthread_mutexattr_init( &attr );
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assert( !status );
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status = pthread_mutexattr_setprotocol( &attr, PTHREAD_PRIO_PROTECT );
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assert( !status );
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status = pthread_mutexattr_setprioceiling( &attr, MEDIUM_PRIORITY );
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assert( !status );
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puts( "Init: Creating a mutex" );
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status = pthread_mutex_init( &Mutex_id, &attr );
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if ( status )
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printf( "status = %d\n", status );
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assert( !status );
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status = pthread_getschedparam( pthread_self(), &schedpolicy, &schedparam );
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assert( !status );
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priority = schedparam.sched_priority;
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sprintf( buffer, " - new priority = %d", priority );
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print_current_time( "Init: ", buffer );
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/* go into a loop consuming CPU time to watch our priority lower */
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for ( ; ; ) {
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status = pthread_getschedparam( pthread_self(), &schedpolicy, &schedparam );
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assert( !status );
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if ( schedparam.sched_priority != LOW_PRIORITY )
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continue;
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priority = schedparam.sched_priority;
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sprintf( buffer, " - new priority = %d", priority );
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print_current_time( "Init: ", buffer );
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puts( "Init: pthread_mutex_lock acquire the lock" );
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status = pthread_mutex_lock( &Mutex_id );
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if ( status )
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printf( "status = %d\n", status );
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assert( !status );
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status = pthread_getschedparam( pthread_self(), &schedpolicy, &schedparam );
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assert( !status );
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priority = schedparam.sched_priority;
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sprintf( buffer, " - new priority = %d", priority );
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print_current_time( "Init: ", buffer );
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break;
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}
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/* now spin waiting for our budget to be replenished */
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for ( ; ; ) {
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status = pthread_getschedparam( pthread_self(), &schedpolicy, &schedparam );
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assert( !status );
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if ( schedparam.sched_priority == HIGH_PRIORITY )
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break;
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}
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priority = schedparam.sched_priority;
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sprintf( buffer, " - new priority = %d", priority );
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print_current_time( "Init: ", buffer );
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/* with this unlock we should be able to go to low priority */
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puts( "Init: unlock mutex" );
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status = pthread_mutex_unlock( &Mutex_id );
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if ( status )
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printf( "status = %d\n", status );
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assert( !status );
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status = pthread_getschedparam( pthread_self(), &schedpolicy, &schedparam );
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assert( !status );
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priority = schedparam.sched_priority;
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sprintf( buffer, " - new priority = %d", priority );
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print_current_time( "Init: ", buffer );
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for ( ; ; ) {
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status = pthread_getschedparam( pthread_self(), &schedpolicy, &schedparam );
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assert( !status );
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if ( schedparam.sched_priority == LOW_PRIORITY )
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break;
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}
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status = pthread_getschedparam( pthread_self(), &schedpolicy, &schedparam );
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assert( !status );
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priority = schedparam.sched_priority;
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sprintf( buffer, " - new priority = %d", priority );
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print_current_time( "Init: ", buffer );
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puts( "*** END OF POSIX TEST 9 ***" );
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exit( 0 );
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return NULL; /* just so the compiler thinks we returned something */
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}
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