rtems_status_code rtems_task_delete(
rtems_id id
)
{
register Thread_Control *the_thread;
Objects_Locations location;
Objects_Information *the_information;
_RTEMS_Lock_allocator();
the_thread = _Thread_Get( id, &location );
switch ( location ) {
case OBJECTS_LOCAL:
the_information = _Objects_Get_information_id( the_thread->Object.id );
#if defined(RTEMS_DEBUG)
if ( !the_information ) {
_Thread_Enable_dispatch();
return RTEMS_INVALID_ID;
/* This should never happen if _Thread_Get() works right */
}
#endif
#if defined(RTEMS_MULTIPROCESSING)
if ( the_thread->is_global ) {
_Objects_MP_Close( &_RTEMS_tasks_Information, the_thread->Object.id );
_RTEMS_tasks_MP_Send_process_packet(
RTEMS_TASKS_MP_ANNOUNCE_DELETE,
the_thread->Object.id,
0 /* Not used */
);
}
#endif
_Thread_Close( the_information, the_thread );
_RTEMS_tasks_Free( the_thread );
_RTEMS_Unlock_allocator();
_Thread_Enable_dispatch();
return RTEMS_SUCCESSFUL;
#if defined(RTEMS_MULTIPROCESSING)
case OBJECTS_REMOTE:
_RTEMS_Unlock_allocator();
_Thread_Dispatch();
return RTEMS_ILLEGAL_ON_REMOTE_OBJECT;
#endif
case OBJECTS_ERROR:
break;
}
_RTEMS_Unlock_allocator();
return RTEMS_INVALID_ID;
}
rtems_status_code rtems_task_create(
rtems_name name,
rtems_task_priority initial_priority,
size_t stack_size,
rtems_mode initial_modes,
rtems_attribute attribute_set,
rtems_id *id
)
{
Thread_Control *the_thread;
bool is_fp;
#if defined(RTEMS_MULTIPROCESSING)
Objects_MP_Control *the_global_object = NULL;
bool is_global;
#endif
bool status;
rtems_attribute the_attribute_set;
Priority_Control core_priority;
RTEMS_API_Control *api;
ASR_Information *asr;
if ( !id )
return RTEMS_INVALID_ADDRESS;
if ( !rtems_is_name_valid( name ) )
return RTEMS_INVALID_NAME;
/*
* Core Thread Initialize insures we get the minimum amount of
* stack space.
*/
/*
* Fix the attribute set to match the attributes which
* this processor (1) requires and (2) is able to support.
* First add in the required flags for attribute_set
* Typically this might include FP if the platform
* or application required all tasks to be fp aware.
* Then turn off the requested bits which are not supported.
*/
the_attribute_set = _Attributes_Set( attribute_set, ATTRIBUTES_REQUIRED );
the_attribute_set =
_Attributes_Clear( the_attribute_set, ATTRIBUTES_NOT_SUPPORTED );
if ( _Attributes_Is_floating_point( the_attribute_set ) )
is_fp = true;
else
is_fp = false;
/*
* Validate the RTEMS API priority and convert it to the core priority range.
*/
if ( !_Attributes_Is_system_task( the_attribute_set ) ) {
if ( !_RTEMS_tasks_Priority_is_valid( initial_priority ) )
return RTEMS_INVALID_PRIORITY;
}
core_priority = _RTEMS_tasks_Priority_to_Core( initial_priority );
#if defined(RTEMS_MULTIPROCESSING)
if ( _Attributes_Is_global( the_attribute_set ) ) {
is_global = true;
if ( !_System_state_Is_multiprocessing )
return RTEMS_MP_NOT_CONFIGURED;
} else
is_global = false;
#endif
/*
* Make sure system is MP if this task is global
*/
/*
* Allocate the thread control block and -- if the task is global --
* allocate a global object control block.
*
* NOTE: This routine does not use the combined allocate and open
* global object routine because this results in a lack of
* control over when memory is allocated and can be freed in
* the event of an error.
*/
the_thread = _RTEMS_tasks_Allocate();
if ( !the_thread ) {
_Objects_Allocator_unlock();
return RTEMS_TOO_MANY;
}
#if defined(RTEMS_MULTIPROCESSING)
if ( is_global ) {
the_global_object = _Objects_MP_Allocate_global_object();
if ( _Objects_MP_Is_null_global_object( the_global_object ) ) {
_RTEMS_tasks_Free( the_thread );
_Objects_Allocator_unlock();
return RTEMS_TOO_MANY;
}
}
#endif
/*
* Initialize the core thread for this task.
*/
status = _Thread_Initialize(
&_RTEMS_tasks_Information,
the_thread,
_Scheduler_Get_by_CPU_index( _SMP_Get_current_processor() ),
NULL,
stack_size,
is_fp,
core_priority,
_Modes_Is_preempt(initial_modes) ? true : false,
_Modes_Is_timeslice(initial_modes) ?
THREAD_CPU_BUDGET_ALGORITHM_RESET_TIMESLICE :
THREAD_CPU_BUDGET_ALGORITHM_NONE,
NULL, /* no budget algorithm callout */
_Modes_Get_interrupt_level(initial_modes),
(Objects_Name) name
);
if ( !status ) {
#if defined(RTEMS_MULTIPROCESSING)
if ( is_global )
_Objects_MP_Free_global_object( the_global_object );
#endif
_RTEMS_tasks_Free( the_thread );
_Objects_Allocator_unlock();
return RTEMS_UNSATISFIED;
}
api = the_thread->API_Extensions[ THREAD_API_RTEMS ];
asr = &api->Signal;
asr->is_enabled = _Modes_Is_asr_disabled(initial_modes) ? false : true;
*id = the_thread->Object.id;
#if defined(RTEMS_MULTIPROCESSING)
the_thread->is_global = is_global;
if ( is_global ) {
_Objects_MP_Open(
&_RTEMS_tasks_Information.Objects,
the_global_object,
name,
the_thread->Object.id
);
_RTEMS_tasks_MP_Send_process_packet(
RTEMS_TASKS_MP_ANNOUNCE_CREATE,
the_thread->Object.id,
name
);
}
#endif
_Objects_Allocator_unlock();
return RTEMS_SUCCESSFUL;
}