source: rtems/testsuites/sptests/spsem01/init.c @ 9cdbf73

/*
 * Copyright (c) 2013 Gedare Bloom.
 *
 * The license and distribution terms for this file may be
 * found in the file LICENSE in this distribution or at
 * http://www.rtems.com/license/LICENSE.
 */

#include <rtems.h>

#include <stdio.h>
#include "tmacros.h"

/* configuration information */
#define CONFIGURE_APPLICATION_NEEDS_CONSOLE_DRIVER
#define CONFIGURE_APPLICATION_NEEDS_CLOCK_DRIVER
#define CONFIGURE_RTEMS_INIT_TASKS_TABLE
#define CONFIGURE_MAXIMUM_TASKS 3
#define CONFIGURE_MAXIMUM_SEMAPHORES 2
#define CONFIGURE_INIT
#include <rtems/confdefs.h>

rtems_task Task01(rtems_task_argument ignored);
rtems_task Task02(rtems_task_argument ignored);
rtems_task Init(rtems_task_argument ignored);

static int getprio(void)
{
  rtems_status_code status;
  rtems_task_priority pri;

  status = rtems_task_set_priority(RTEMS_SELF, RTEMS_CURRENT_PRIORITY, &pri);
  directive_failed( status, "rtems_task_set_priority");
  return (int)pri;
}

rtems_id   Task_id[2];
rtems_name Task_name[2];

rtems_id   sem_id[2];
rtems_name sem_name[2];

rtems_task Init(rtems_task_argument ignored)
{
  rtems_status_code status;
  rtems_attribute sem_attr;

  printf("\n*** TEST SEM01 ***\n");

  sem_attr = RTEMS_INHERIT_PRIORITY | RTEMS_BINARY_SEMAPHORE | RTEMS_PRIORITY;

  sem_name[0] = rtems_build_name( 'S','0',' ',' ');
  status = rtems_semaphore_create(
    sem_name[0],
    1,
    sem_attr,
    0,
    &sem_id[0]
  );
  directive_failed( status, "rtems_semaphore_create of S0");
  printf("init: S0 created\n");

  sem_name[1] = rtems_build_name( 'S','1',' ',' ');
  status = rtems_semaphore_create(
    sem_name[1],
    1,
    sem_attr,
    0,
    &sem_id[1]
  );
  directive_failed( status, "rtems_semaphore_create of S1");
  printf("init: S1 created\n");

  Task_name[0] = rtems_build_name( 'T','A','0','1');
  status = rtems_task_create(
    Task_name[0],
    36,
    RTEMS_MINIMUM_STACK_SIZE,
    RTEMS_DEFAULT_MODES,
    RTEMS_DEFAULT_ATTRIBUTES,
    &Task_id[0]
  );
  directive_failed( status, "rtems_task_create of TA01");
  printf("init: TA01 created with priority 36\n");

  Task_name[1] = rtems_build_name( 'T','A','0','2');
  status = rtems_task_create(
    Task_name[1],
    34,
    RTEMS_MINIMUM_STACK_SIZE,
    RTEMS_DEFAULT_MODES,
    RTEMS_DEFAULT_ATTRIBUTES,
    &Task_id[1]
  );
  directive_failed( status , "rtems_task_create of TA02\n");
  printf("init: TA02 created with priority 34\n");

  status = rtems_task_start( Task_id[0], Task01, 0);
  directive_failed( status, "rtems_task_start of TA01");

  status = rtems_task_delete( RTEMS_SELF);
  directive_failed( status, "rtems_task_delete of INIT");
}

/* Task01 starts with priority 36 */
rtems_task Task01(rtems_task_argument ignored)
{
  rtems_status_code status;
  printf("TA01: started with priority %d\n", getprio());

  status = rtems_semaphore_obtain( sem_id[0], RTEMS_WAIT, 0 );
  directive_failed( status, "rtems_semaphore_obtain of S0\n");
  printf("TA01: priority %d, holding S0\n", getprio());

  status = rtems_semaphore_obtain( sem_id[1], RTEMS_WAIT, 0 );
  directive_failed( status, "rtems_semaphore_obtain of S1");
  printf("TA01: priority %d, holding S0, S1\n", getprio());

  /* Start Task 2 (TA02) with priority 34. It will run immediately. */
  status = rtems_task_start( Task_id[1], Task02, 0);
  directive_failed( status, "rtems_task_start of TA02\n");

  status = rtems_semaphore_release(sem_id[1]);
  directive_failed( status, "rtems_semaphore_release of S1\n");
  printf("TA01: priority %d, holding S0\n", getprio());

  status = rtems_semaphore_release(sem_id[0]);
  directive_failed( status, "rtems_semaphore_release of S0\n");
  printf("TA01: priority %d\n", getprio());

  printf("TA01: exiting\n");
  printf("*** END OF SEM01 ***\n");
  status = rtems_task_delete( RTEMS_SELF);
  directive_failed( status, "rtems_task_delete TA01");
}

/* TA02 starts at Task02 with priority 34 */
rtems_task Task02(rtems_task_argument ignored)
{
  rtems_status_code status;

  printf("TA02: started with priority %d\n", getprio());

  /* Obtain S1, which should be held by TA01 by now */
  status = rtems_semaphore_obtain( sem_id[1], RTEMS_WAIT, 0 );
  directive_failed( status, " rtems_semaphore_obtain S1");
  printf("TA02: priority %d, holding S1\n", getprio());

  printf("TA02: exiting\n");
  status = rtems_task_delete( RTEMS_SELF);
  directive_failed( status, "rtems_task_delete TA02");
}