C++ rtems_task_suspend函数代码示例

rtems_task Task02( rtems_task_argument ignored )
{

  /* Benchmark code */
  benchmark_timer_initialize();
  for ( count = 0; count < BENCHMARKS; count++ ) {
    if ( sem_exe == 1 ) {
      rtems_semaphore_obtain( sem_id, RTEMS_WAIT, 0 );
    }
    rtems_task_wake_after( RTEMS_YIELD_PROCESSOR );

    if ( sem_exe == 1 ) {
      rtems_semaphore_release( sem_id );
    }
    rtems_task_wake_after( RTEMS_YIELD_PROCESSOR );
  }
  telapsed = benchmark_timer_read();

  /* Check which run this was */
  if (sem_exe == 0) {
    tswitch_overhead = telapsed;
    rtems_task_suspend( Task_id[0] );
    rtems_task_suspend( RTEMS_SELF );
  } else {
    put_time(
       "Rhealstone: Semaphore Shuffle",
       telapsed,
       (BENCHMARKS * 2),        /* Total number of semaphore-shuffles*/
       tswitch_overhead,        /* Overhead of loop and task switches */
       0
    );
    TEST_END();
    rtems_test_exit( 0 );
  }
}

static void reset(test_context *ctx)
{
  rtems_status_code sc;
  size_t i;

  for (i = 0; i < TASK_COUNT; ++i) {
    set_priority(ctx->task_ids[i], P(i));
    set_affinity(ctx->task_ids[i], A(1, 1));
  }

  for (i = CPU_COUNT; i < TASK_COUNT; ++i) {
    sc = rtems_task_suspend(ctx->task_ids[i]);
    rtems_test_assert(sc == RTEMS_SUCCESSFUL || sc == RTEMS_ALREADY_SUSPENDED);
  }

  for (i = 0; i < CPU_COUNT; ++i) {
    sc = rtems_task_resume(ctx->task_ids[i]);
    rtems_test_assert(sc == RTEMS_SUCCESSFUL || sc == RTEMS_INCORRECT_STATE);
  }

  /* Order the idle threads explicitly */
  for (i = 0; i < CPU_COUNT; ++i) {
    const Per_CPU_Control *c;
    const Thread_Control *h;

    c = _Per_CPU_Get_by_index(CPU_COUNT - 1 - i);
    h = c->heir;

    sc = rtems_task_suspend(h->Object.id);
    rtems_test_assert(sc == RTEMS_SUCCESSFUL);
  }
}

/*
 * Use a timer to execute the actions, since it runs with thread dispatching
 * disabled.  This is necessary to check the expected processor allocations.
 */
static void timer(rtems_id id, void *arg)
{
  test_context *ctx;
  rtems_status_code sc;
  size_t i;

  ctx = arg;
  i = ctx->action_index;

  if (i == 0) {
    sc = rtems_task_suspend(ctx->master_id);
    rtems_test_assert(sc == RTEMS_SUCCESSFUL);
  }

  if (i < RTEMS_ARRAY_SIZE(test_actions)) {
    const test_action *action = &test_actions[i];
    rtems_id task;

    ctx->action_index = i + 1;

    task = ctx->task_ids[action->index];

    switch (action->kind) {
      case KIND_SET_PRIORITY:
        set_priority(task, action->data.priority);
        break;
      case KIND_SET_AFFINITY:
        set_affinity(task, action->data.cpu_set);
        break;
      case KIND_BLOCK:
        sc = rtems_task_suspend(task);
        rtems_test_assert(sc == RTEMS_SUCCESSFUL);
        break;
      case KIND_UNBLOCK:
        sc = rtems_task_resume(task);
        rtems_test_assert(sc == RTEMS_SUCCESSFUL);
        break;
      default:
        rtems_test_assert(action->kind == KIND_RESET);
        reset(ctx);
        break;
    }

    check_cpu_allocations(ctx, action);

    sc = rtems_timer_reset(id);
    rtems_test_assert(sc == RTEMS_SUCCESSFUL);
  } else {
    sc = rtems_task_resume(ctx->master_id);
    rtems_test_assert(sc == RTEMS_SUCCESSFUL);

    sc = rtems_event_transient_send(ctx->master_id);
    rtems_test_assert(sc == RTEMS_SUCCESSFUL);
  }
}

rtems_task Task_1(
  rtems_task_argument argument
)
{
  rtems_id          tid2;
  rtems_id          tid3;
  uint32_t    pass;
  rtems_status_code status;

  status = rtems_task_ident( Task_name[ 2 ], 1, &tid2 );
  directive_failed( status, "rtems_task_ident of TA2" );

  status = rtems_task_ident( Task_name[ 3 ], 1, &tid3 );
  directive_failed( status, "rtems_task_ident of TA3" );

  for ( pass=1 ; pass <= 3 ; pass++ ) {

    puts( "TA1 - rtems_task_wake_after - sleep 5 seconds" );
    status = rtems_task_wake_after( 5*rtems_clock_get_ticks_per_second() );
    directive_failed( status, "rtems_task_wake_after of TA1" );

    puts( "TA1 - rtems_task_suspend - suspend TA3" );
    status = rtems_task_suspend( tid3 );
    if ( pass == 1 ) {
      fatal_directive_status(
         status,
         RTEMS_ALREADY_SUSPENDED,
         "rtems_task_suspend of TA3"
      );
    } else {
      directive_failed( status, "rtems_task_suspend of TA3" );
    }

    puts( "TA1 - rtems_task_resume - resume TA2" );
    status = rtems_task_resume( tid2 );
    directive_failed( status, "rtems_task_resume of TA2" );

    puts( "TA1 - rtems_task_wake_after - sleep 5 seconds" );
    status = rtems_task_wake_after( 5*rtems_clock_get_ticks_per_second() );
    directive_failed( status, "rtems_task_wake_after" );

    puts( "TA1 - rtems_task_suspend - suspend TA2" );
    status = rtems_task_suspend( tid2 );
    directive_failed( status, "rtems_task_suspend of TA2" );

    puts( "TA1 - rtems_task_resume - resume TA3" );
    status = rtems_task_resume( tid3 );
    directive_failed( status, "rtems_task_resume" );
  }

  TEST_END();
  rtems_test_exit( 0 );
}

rtems_task Task_1_through_3(
  rtems_task_argument argument
)
{
  rtems_id          tid;
  rtems_time_of_day time;
  rtems_status_code status;

  status = rtems_task_ident( RTEMS_SELF, RTEMS_SEARCH_ALL_NODES, &tid );
  directive_failed( status, "rtems_task_ident of self" );

  while ( FOREVER )  {
    status = rtems_timer_fire_after(
      Timer_id[ argument ],
      task_number( tid ) * 5 * TICKS_PER_SECOND,
      Resume_task,
      NULL
    );
    directive_failed( status, "tm_fire_after failed" );

    status = rtems_clock_get( RTEMS_CLOCK_GET_TOD, &time );
    directive_failed( status, "rtems_clock_get failed" );

    if ( time.second >= 35 ) {
      puts( "*** END OF TEST 24 ***" );
      rtems_test_exit( 0 );
    }

    put_name( Task_name[ task_number( tid ) ], FALSE );
    print_time( " - rtems_clock_get - ", &time, "\n" );

    status = rtems_task_suspend( RTEMS_SELF );
    directive_failed( status, "rtems_task_suspend" );
  }
}

/*
 * Task that calls the function we want to trace
 */
static void task(rtems_task_argument arg)
{
  rtems_status_code sc;
  uint32_t i;

  for ( i = 0; i < ITERATIONS; i++ ) {
    /*
     * Wait until the previous task in the task chain
     * has completed its operation.
     */
    sc = rtems_semaphore_obtain(task_data[arg].prev_sem, 0, 0);
    rtems_test_assert(sc == RTEMS_SUCCESSFUL);

    add_number_wrapper(arg, i);

    /*
     * Signal the next task in the chain to continue
     */
    sc = rtems_semaphore_release(task_data[arg].task_sem);
    rtems_test_assert(sc == RTEMS_SUCCESSFUL);
  }

  /* Signal the main task that this task has finished */
  sc = rtems_semaphore_release(finished_sem);
  rtems_test_assert(sc == RTEMS_SUCCESSFUL);
  rtems_task_suspend(rtems_task_self());
}

static void task_high(rtems_task_argument arg)
{
  rtems_status_code sc = RTEMS_SUCCESSFUL;
  rtems_bdbuf_buffer *bd = NULL;

  sc = rtems_task_suspend(RTEMS_SELF);
  ASSERT_SC(sc);

  printk("H: try access: 0\n");

  sc = rtems_bdbuf_get(dd, 0, &bd);
  ASSERT_SC(sc);

  printk("H: access: 0\n");

  printk("H: release: 0\n");

  sc = rtems_bdbuf_release(bd);
  ASSERT_SC(sc);

  printk("H: release done: 0\n");

  printk("*** END OF TEST BLOCK 4 ***\n");

  exit(0);
}

static void suspend(rtems_id task)
{
  rtems_status_code sc = RTEMS_SUCCESSFUL;

  sc = rtems_task_suspend(task);
  ASSERT_SC(sc);
}

/*
 * RTEMS Startup Task
 */
rtems_task
Init (rtems_task_argument ignored)
{
	putenv ("TERM=xterm");
	main (0, NULL);
	rtems_task_suspend (RTEMS_SELF);
}

static void low_task( rtems_task_argument arg )
{
  rtems_test_assert( test_no_preempt_step == 1 );
  test_no_preempt_step = 2;

  rtems_task_suspend(RTEMS_SELF);
  rtems_test_assert(0);
}

rtems_task Init(
  rtems_task_argument argument
)
{
  rtems_status_code status;
  rtems_time_of_day time;
  int               i;
  char              ch[4];
  rtems_id          id;
 
  locked_print_initialize();
  locked_printf( "\n\n*** SMP08 TEST ***\n" );

  time.year   = 1988;
  time.month  = 12;
  time.day    = 31;
  time.hour   = 9;
  time.minute = 0;
  time.second = 0;
  time.ticks  = 0;

  status = rtems_clock_set( &time );

  /* Create/verify synchronisation semaphore */
  status = rtems_semaphore_create(
    rtems_build_name ('S', 'E', 'M', '1'),
    1,                                             
    RTEMS_LOCAL                   |
    RTEMS_SIMPLE_BINARY_SEMAPHORE |
    RTEMS_PRIORITY,
    1,
    &Semaphore
  );
  directive_failed( status, "rtems_semaphore_create" );

  /* Show that the init task is running on this cpu */
  PrintTaskInfo( "Init", &time );

  for ( i=1; i <= rtems_smp_get_processor_count() *3; i++ ) {

    sprintf(ch, "%02" PRId32, i );
    status = rtems_task_create(
      rtems_build_name( 'T', 'A', ch[0], ch[1] ),
      2,
      RTEMS_MINIMUM_STACK_SIZE,
      RTEMS_DEFAULT_MODES,
      RTEMS_DEFAULT_ATTRIBUTES,
      &id
    );
    directive_failed( status, "task create" );

    status = rtems_task_start( id, Test_task, i+1 );
    directive_failed( status, "task start" );
  }

  /* FIXME: Task deletion currently not supported */
  (void) rtems_task_suspend( RTEMS_SELF );
}

void
epicsThreadSuspendSelf (void)
{
    rtems_status_code sc;

    sc = rtems_task_suspend (RTEMS_SELF);
    if(sc != RTEMS_SUCCESSFUL)
        errlogPrintf("epicsThreadSuspendSelf failed: %s\n", rtems_status_text (sc));
}

rtems_task Middle_tasks(
  rtems_task_argument argument
)
{
  (void) rtems_task_suspend( RTEMS_SELF );

  Task_index++;
  (void) rtems_task_resume( Task_id[ Task_index ] );
}

static void worker_task(rtems_task_argument arg)
{
  rtems_status_code sc;

  all_tests();

  sc = rtems_task_suspend(RTEMS_SELF);
  rtems_test_assert(sc == RTEMS_SUCCESSFUL);
}

static rtems_task Init(rtems_task_argument argument)
{
  rtems_status_code sc = RTEMS_SUCCESSFUL;
  rtems_bdbuf_buffer *bd = NULL;
  dev_t dev = 0;

  printk("\n\n*** TEST BLOCK 3 ***\n");

  sc = rtems_disk_io_initialize();
  ASSERT_SC(sc);

  sc = ramdisk_register(BLOCK_SIZE, BLOCK_COUNT, false, "/dev/rda", &dev);
  ASSERT_SC(sc);

  dd = rtems_disk_obtain(dev);
  rtems_test_assert(dd != NULL);

  sc = rtems_task_create(
    rtems_build_name(' ', 'L', 'O', 'W'),
    PRIORITY_LOW,
    0,
    RTEMS_DEFAULT_MODES,
    RTEMS_DEFAULT_ATTRIBUTES,
    &task_id_low
  );
  ASSERT_SC(sc);

  sc = rtems_task_start(task_id_low, task_low, 0);
  ASSERT_SC(sc);

  sc = rtems_task_create(
    rtems_build_name('H', 'I', 'G', 'H'),
    PRIORITY_HIGH,
    0,
    RTEMS_DEFAULT_MODES,
    RTEMS_DEFAULT_ATTRIBUTES,
    &task_id_high
  );
  ASSERT_SC(sc);

  sc = rtems_task_start(task_id_high, task_high, 0);
  ASSERT_SC(sc);

  sc = rtems_bdbuf_get(dd, 0, &bd);
  ASSERT_SC(sc);

  sc = rtems_bdbuf_sync(bd);
  ASSERT_SC(sc);

  printk("I: sync done: 0\n");

  sync_done = true;

  sc = rtems_task_suspend(RTEMS_SELF);
  ASSERT_SC(sc);
}