C++ (Cpp) _CORE_barrier_Initialize Examples

Example #1

File: barriercreate.c Project: epicsdeb/rtems

rtems_status_code rtems_barrier_create(
  rtems_name           name,
  rtems_attribute      attribute_set,
  uint32_t             maximum_waiters,
  rtems_id            *id
)
{
  Barrier_Control         *the_barrier;
  CORE_barrier_Attributes  the_attributes;

  if ( !rtems_is_name_valid( name ) )
    return RTEMS_INVALID_NAME;

  if ( !id )
    return RTEMS_INVALID_ADDRESS;

  /* Initialize core barrier attributes */
  if ( _Attributes_Is_barrier_automatic( attribute_set ) ) {
    the_attributes.discipline = CORE_BARRIER_AUTOMATIC_RELEASE;
    if ( maximum_waiters == 0 )
      return RTEMS_INVALID_NUMBER;
  } else
    the_attributes.discipline = CORE_BARRIER_MANUAL_RELEASE;
  the_attributes.maximum_count = maximum_waiters;

  _Thread_Disable_dispatch();             /* prevents deletion */

  the_barrier = _Barrier_Allocate();

  if ( !the_barrier ) {
    _Thread_Enable_dispatch();
    return RTEMS_TOO_MANY;
  }

  the_barrier->attribute_set = attribute_set;

  _CORE_barrier_Initialize( &the_barrier->Barrier, &the_attributes );

  _Objects_Open(
    &_Barrier_Information,
    &the_barrier->Object,
    (Objects_Name) name
  );

  *id = the_barrier->Object.id;

  _Thread_Enable_dispatch();
  return RTEMS_SUCCESSFUL;
}

Example #2

File: pbarrierinit.c Project: FullMentalPanic/RTEMS_NEW_TOOL_CHAIN

int pthread_barrier_init(
  pthread_barrier_t           *barrier,
  const pthread_barrierattr_t *attr,
  unsigned int                 count
)
{
  POSIX_Barrier_Control         *the_barrier;
  CORE_barrier_Attributes        the_attributes;
  pthread_barrierattr_t          my_attr;
  const pthread_barrierattr_t   *the_attr;

  /*
   *  Error check parameters
   */
  if ( !barrier )
    return EINVAL;

  if ( count == 0 )
    return EINVAL;

  /*
   * If the user passed in NULL, use the default attributes
   */
  if ( attr ) {
    the_attr = attr;
  } else {
    (void) pthread_barrierattr_init( &my_attr );
    the_attr = &my_attr;
  }

  /*
   * Now start error checking the attributes that we are going to use
   */
  if ( !the_attr->is_initialized )
    return EINVAL;

  switch ( the_attr->process_shared ) {
    case PTHREAD_PROCESS_PRIVATE:    /* only supported values */
      break;
    case PTHREAD_PROCESS_SHARED:
    default:
      return EINVAL;
  }

  /*
   * Convert from POSIX attributes to Core Barrier attributes
   */
  the_attributes.discipline    = CORE_BARRIER_AUTOMATIC_RELEASE;
  the_attributes.maximum_count = count;

  /*
   * Enter dispatching critical section to allocate and initialize barrier
   */
  _Thread_Disable_dispatch();             /* prevents deletion */

  the_barrier = _POSIX_Barrier_Allocate();

  if ( !the_barrier ) {
    _Thread_Enable_dispatch();
    return EAGAIN;
  }

  _CORE_barrier_Initialize( &the_barrier->Barrier, &the_attributes );

  _Objects_Open_u32(
    &_POSIX_Barrier_Information,
    &the_barrier->Object,
    0
  );

  /*
   * Exit the critical section and return the user an operational barrier
   */
  *barrier = the_barrier->Object.id;
  _Thread_Enable_dispatch();
  return 0;
}