rtems_status_code rtems_task_get_note(
Objects_Id id,
uint32_t notepad,
uint32_t *note
)
{
register Thread_Control *the_thread;
Objects_Locations location;
RTEMS_API_Control *api;
if ( !note )
return RTEMS_INVALID_ADDRESS;
/*
* NOTE: There is no check for < RTEMS_NOTEPAD_FIRST because that would
* be checking an unsigned number for being negative.
*/
if ( notepad > RTEMS_NOTEPAD_LAST )
return RTEMS_INVALID_NUMBER;
/*
* Optimize the most likely case to avoid the Thread_Dispatch.
*/
if ( _Objects_Are_ids_equal( id, OBJECTS_ID_OF_SELF ) ||
_Objects_Are_ids_equal( id, _Thread_Executing->Object.id ) ) {
api = _Thread_Executing->API_Extensions[ THREAD_API_RTEMS ];
*note = api->Notepads[ notepad ];
return RTEMS_SUCCESSFUL;
}
the_thread = _Thread_Get( id, &location );
switch ( location ) {
case OBJECTS_REMOTE:
#if defined(RTEMS_MULTIPROCESSING)
_Thread_Executing->Wait.return_argument = note;
return _RTEMS_tasks_MP_Send_request_packet(
RTEMS_TASKS_MP_GET_NOTE_REQUEST,
id,
0, /* Not used */
notepad,
0 /* Not used */
);
#endif
case OBJECTS_ERROR:
return RTEMS_INVALID_ID;
case OBJECTS_LOCAL:
api = the_thread->API_Extensions[ THREAD_API_RTEMS ];
*note = api->Notepads[ notepad ];
_Thread_Enable_dispatch();
return RTEMS_SUCCESSFUL;
}
return RTEMS_INTERNAL_ERROR; /* unreached - only to remove warnings */
}
rtems_status_code rtems_task_resume(
rtems_id id
)
{
Thread_Control *the_thread;
Objects_Locations location;
States_Control previous_state;
the_thread = _Thread_Get( id, &location );
switch ( location ) {
case OBJECTS_LOCAL:
previous_state = _Thread_Clear_state( the_thread, STATES_SUSPENDED );
_Objects_Put( &the_thread->Object );
return _States_Is_suspended( previous_state ) ?
RTEMS_SUCCESSFUL : RTEMS_INCORRECT_STATE;
#if defined(RTEMS_MULTIPROCESSING)
case OBJECTS_REMOTE:
return _RTEMS_tasks_MP_Send_request_packet(
RTEMS_TASKS_MP_RESUME_REQUEST,
id,
0, /* Not used */
0, /* Not used */
0 /* Not used */
);
#endif
case OBJECTS_ERROR:
break;
}
return RTEMS_INVALID_ID;
}
rtems_status_code rtems_task_set_note(
rtems_id id,
uint32_t notepad,
uint32_t note
)
{
Thread_Control *the_thread;
Objects_Locations location;
RTEMS_API_Control *api;
Thread_Control *executing;
if ( !rtems_configuration_get_notepads_enabled() )
return RTEMS_NOT_CONFIGURED;
/*
* NOTE: There is no check for < RTEMS_NOTEPAD_FIRST because that would
* be checking an unsigned number for being negative.
*/
if ( notepad > RTEMS_NOTEPAD_LAST )
return RTEMS_INVALID_NUMBER;
/*
* Optimize the most likely case to avoid the Thread_Dispatch.
*/
executing = _Thread_Get_executing();
if ( _Objects_Are_ids_equal( id, OBJECTS_ID_OF_SELF ) ||
_Objects_Are_ids_equal( id, executing->Object.id ) ) {
api = executing->API_Extensions[ THREAD_API_RTEMS ];
api->Notepads[ notepad ] = note;
return RTEMS_SUCCESSFUL;
}
the_thread = _Thread_Get( id, &location );
switch ( location ) {
case OBJECTS_LOCAL:
api = the_thread->API_Extensions[ THREAD_API_RTEMS ];
api->Notepads[ notepad ] = note;
_Objects_Put( &the_thread->Object );
return RTEMS_SUCCESSFUL;
#if defined(RTEMS_MULTIPROCESSING)
case OBJECTS_REMOTE:
return _RTEMS_tasks_MP_Send_request_packet(
RTEMS_TASKS_MP_SET_NOTE_REQUEST,
id,
0, /* Not used */
notepad,
note
);
#endif
case OBJECTS_ERROR:
break;
}
return RTEMS_INVALID_ID;
}
epos_status_code epos_task_set_priority(
epos_id id,
epos_task_priority new_priority,
epos_task_priority *old_priority
)
{
register Thread_Control *the_thread;
Objects_Locations location;
if ( new_priority != RTEMS_CURRENT_PRIORITY &&
!_RTEMS_tasks_Priority_is_valid( new_priority ) )
return RTEMS_INVALID_PRIORITY;
if ( !old_priority )
return RTEMS_INVALID_ADDRESS;
the_thread = _Thread_Get( id, &location );
switch ( location ) {
case OBJECTS_LOCAL:
/* XXX need helper to "convert" from core priority */
*old_priority = the_thread->current_priority;
if ( new_priority != RTEMS_CURRENT_PRIORITY ) {
the_thread->real_priority = new_priority;
if ( the_thread->resource_count == 0 ||
the_thread->current_priority > new_priority )
_Thread_Change_priority( the_thread, new_priority, false );
}
_Thread_Enable_dispatch();
return RTEMS_SUCCESSFUL;
#if defined(RTEMS_MULTIPROCESSING)
case OBJECTS_REMOTE:
_Thread_Executing->Wait.return_argument = old_priority;
return _RTEMS_tasks_MP_Send_request_packet(
RTEMS_TASKS_MP_SET_PRIORITY_REQUEST,
id,
new_priority,
0, /* Not used */
0 /* Not used */
);
#endif
case OBJECTS_ERROR:
break;
}
return RTEMS_INVALID_ID;
}
rtems_status_code rtems_task_suspend(
rtems_id id
)
{
register Thread_Control *the_thread;
Objects_Locations location;
the_thread = _Thread_Get( id, &location );
switch ( location ) {
case OBJECTS_LOCAL:
if ( !_States_Is_suspended( the_thread->current_state ) ) {
_Thread_Suspend( the_thread );
_Thread_Enable_dispatch();
return RTEMS_SUCCESSFUL;
}
_Thread_Enable_dispatch();
return RTEMS_ALREADY_SUSPENDED;
#if defined(RTEMS_MULTIPROCESSING)
case OBJECTS_REMOTE:
return _RTEMS_tasks_MP_Send_request_packet(
RTEMS_TASKS_MP_SUSPEND_REQUEST,
id,
0, /* Not used */
0, /* Not used */
0 /* Not used */
);
#endif
case OBJECTS_ERROR:
break;
}
return RTEMS_INVALID_ID;
}
rtems_status_code rtems_task_resume(
rtems_id id
)
{
register Thread_Control *the_thread;
Objects_Locations location;
the_thread = _Thread_Get( id, &location );
switch ( location ) {
case OBJECTS_LOCAL:
if ( _States_Is_suspended( the_thread->current_state ) ) {
_Thread_Resume( the_thread );
_Objects_Put( &the_thread->Object );
return RTEMS_SUCCESSFUL;
}
_Objects_Put( &the_thread->Object );
return RTEMS_INCORRECT_STATE;
#if defined(RTEMS_MULTIPROCESSING)
case OBJECTS_REMOTE:
return _RTEMS_tasks_MP_Send_request_packet(
RTEMS_TASKS_MP_RESUME_REQUEST,
id,
0, /* Not used */
0, /* Not used */
0 /* Not used */
);
#endif
case OBJECTS_ERROR:
break;
}
return RTEMS_INVALID_ID;
}
