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/*
* Original version submitted as part of PR1212
*
* This example shows a possible blocking of timeslicing if task mode is
* changed to timeslicing in the middle of its executing.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#define TEST_INIT
#include <tmacros.h>
#include <rtems.h>
#include <stdio.h>
#include <stdlib.h>
const char rtems_test_name[] = "SP 44";
rtems_task Init(rtems_task_argument ignored);
rtems_task TaskAB_entry(rtems_task_argument me);
/*** Task priorities ***/
#define TASK_A_PRIORITY 10
#define TASK_B_PRIORITY 10
/*** Task names ***/
#define TASK_A_NAME 1
#define TASK_B_NAME 2
/*** Task atributes ***/
#define TASK_A_INITMODE RTEMS_DEFAULT_MODES
#define TASK_B_INITMODE RTEMS_DEFAULT_MODES
/*** Task generic parameters ***/
#define TASK_A_STACKSIZE RTEMS_MINIMUM_STACK_SIZE
#define TASK_A_MODEATTR RTEMS_DEFAULT_ATTRIBUTES
#define TASK_B_STACKSIZE RTEMS_MINIMUM_STACK_SIZE
#define TASK_B_MODEATTR RTEMS_DEFAULT_ATTRIBUTES
volatile uint32_t turn;
rtems_id TaskA_id, TaskB_id;
/* TASK A/B */
rtems_task TaskAB_entry(rtems_task_argument me)
{
static rtems_mode previous_mode_set;
rtems_status_code status;
uint32_t iterations = 0;
status = rtems_task_mode(
RTEMS_PREEMPT | RTEMS_TIMESLICE,
RTEMS_PREEMPT_MASK | RTEMS_TIMESLICE_MASK,
&previous_mode_set
);
directive_failed(status, "Unable to change task mode.");
while(1) {
if (turn == me) {
printf(
"Task #%" PRIdrtems_task_argument "'s turn. Now setting turn to %"
PRIdrtems_task_argument "\n",
me,
1 - me
);
if ( ++iterations == 10 ) {
TEST_END();
exit( 0 );
}
turn = 1 - me;
}
}
}
rtems_task Init(rtems_task_argument ignored)
{
static rtems_status_code status;
TEST_BEGIN();
/* Create Task A */
status = rtems_task_create(
TASK_A_NAME,
TASK_A_PRIORITY,
TASK_A_STACKSIZE,
TASK_A_INITMODE,
TASK_A_MODEATTR,
&TaskA_id
);
directive_failed(status,"rtems_task_create");
/* Start Task A */
status = rtems_task_start(TaskA_id, TaskAB_entry, 0);
directive_failed(status,"rtems_task_start");
/* Create Task B */
status = rtems_task_create(
TASK_B_NAME,
TASK_B_PRIORITY,
TASK_B_STACKSIZE,
TASK_B_INITMODE,
TASK_B_MODEATTR,
&TaskB_id
);
directive_failed( status, "rtems_task_create" );
/* Start Task B */
status = rtems_task_start(TaskB_id, TaskAB_entry, 1);
directive_failed( status, "rtems_task_start" );
/* Suspend itself */
status = rtems_task_suspend(RTEMS_SELF);
directive_failed( status, "rtems_task_suspend" );
/* This task is not suposed to be executed anymore */
printf("\nNOT SUPOSED TO RETURN HERE...\n");
rtems_test_exit(1);
}
/* configuration information */
#define CONFIGURE_APPLICATION_NEEDS_CLOCK_DRIVER
#define CONFIGURE_APPLICATION_NEEDS_CONSOLE_DRIVER
#define CONFIGURE_MICROSECONDS_PER_TICK 1000
#define CONFIGURE_TICKS_PER_TIMESLICE 10
#define CONFIGURE_MAXIMUM_TASKS 3
#define CONFIGURE_INITIAL_EXTENSIONS RTEMS_TEST_INITIAL_EXTENSION
#define CONFIGURE_RTEMS_INIT_TASKS_TABLE
#define CONFIGURE_INIT
#include <rtems/confdefs.h>
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