void _Thread_Close( Thread_Control *the_thread, Thread_Control *executing )
{
_Assert( _Thread_Is_life_protected( executing->Life.state ) );
if ( _States_Is_dormant( the_thread->current_state ) ) {
_Thread_Make_zombie( the_thread );
} else {
if (
the_thread != executing
&& !_Thread_Is_life_terminating( executing->Life.state )
) {
/*
* Wait for termination of victim thread. If the executing thread is
* also terminated, then do not wait. This avoids potential cyclic
* dependencies and thus dead lock.
*/
the_thread->Life.terminator = executing;
_Thread_Set_state( executing, STATES_WAITING_FOR_TERMINATION );
}
_Thread_Request_life_change(
the_thread,
executing,
executing->current_priority,
THREAD_LIFE_TERMINATING
);
}
}
static void _Thread_Request_life_change(
Thread_Control *the_thread,
Thread_Control *executing,
Priority_Control priority,
Thread_Life_state additional_life_state
)
{
Thread_Life_state previous_life_state;
Per_CPU_Control *cpu;
ISR_Level level;
const Scheduler_Control *scheduler;
cpu = _Thread_Action_ISR_disable_and_acquire( the_thread, &level );
previous_life_state = the_thread->Life.state;
the_thread->Life.state = previous_life_state | additional_life_state;
_Thread_Action_release_and_ISR_enable( cpu, level );
scheduler = _Scheduler_Get( the_thread );
if ( the_thread == executing ) {
executing->real_priority = priority;
_Scheduler_Set_priority_if_higher( scheduler, the_thread, priority );
_Thread_Start_life_change_for_executing( executing );
} else if ( previous_life_state == THREAD_LIFE_NORMAL ) {
_Thread_Start_life_change( the_thread, scheduler, priority );
} else {
_Thread_Clear_state( the_thread, STATES_SUSPENDED );
if ( _Thread_Is_life_terminating( additional_life_state ) ) {
the_thread->real_priority = _Scheduler_Highest_priority_of_two(
scheduler,
the_thread->real_priority,
priority
);
_Scheduler_Change_priority_if_higher(
scheduler,
the_thread,
priority,
false
);
}
}
}
void _Thread_Life_action_handler(
Thread_Control *executing,
Thread_Action *action,
ISR_lock_Context *lock_context
)
{
Thread_Life_state previous_life_state;
Per_CPU_Control *cpu_self;
(void) action;
previous_life_state = executing->Life.state;
executing->Life.state = previous_life_state | THREAD_LIFE_PROTECTED;
_Thread_State_release( executing, lock_context );
if ( _Thread_Is_life_terminating( previous_life_state ) ) {
_User_extensions_Thread_terminate( executing );
} else {
_Assert( _Thread_Is_life_restarting( previous_life_state ) );
_User_extensions_Thread_restart( executing );
}
cpu_self = _Thread_Dispatch_disable();
if ( _Thread_Is_life_terminating( previous_life_state ) ) {
cpu_self = _Thread_Wait_for_join( executing, cpu_self );
_Thread_Make_zombie( executing );
/* FIXME: Workaround for https://devel.rtems.org/ticket/2751 */
cpu_self->dispatch_necessary = true;
_Assert( cpu_self->heir != executing );
_Thread_Dispatch_enable( cpu_self );
RTEMS_UNREACHABLE();
}
_Assert( _Thread_Is_life_restarting( previous_life_state ) );
_Thread_State_acquire( executing, lock_context );
_Thread_Change_life_locked(
executing,
THREAD_LIFE_PROTECTED | THREAD_LIFE_RESTARTING,
0,
0
);
_Thread_State_release( executing, lock_context );
_Assert(
_Watchdog_Get_state( &executing->Timer.Watchdog ) == WATCHDOG_INACTIVE
);
_Assert(
executing->current_state == STATES_READY
|| executing->current_state == STATES_SUSPENDED
);
_User_extensions_Destroy_iterators( executing );
_Thread_Load_environment( executing );
#if ( CPU_HARDWARE_FP == TRUE ) || ( CPU_SOFTWARE_FP == TRUE )
if ( executing->fp_context != NULL ) {
_Context_Restore_fp( &executing->fp_context );
}
#endif
_Context_Restart_self( &executing->Registers );
RTEMS_UNREACHABLE();
}
void _Thread_Life_action_handler(
Thread_Control *executing,
Thread_Action *action,
Per_CPU_Control *cpu,
ISR_Level level
)
{
Thread_Life_state previous_life_state;
(void) action;
previous_life_state = executing->Life.state;
executing->Life.state = THREAD_LIFE_PROTECTED;
_Thread_Action_release_and_ISR_enable( cpu, level );
if ( _Thread_Is_life_terminating( previous_life_state ) ) {
_User_extensions_Thread_terminate( executing );
} else {
_Assert( _Thread_Is_life_restarting( previous_life_state ) );
_User_extensions_Thread_restart( executing );
}
_Thread_Disable_dispatch();
if ( _Thread_Is_life_terminating( previous_life_state ) ) {
_Thread_Make_zombie( executing );
if ( executing->Life.terminator != NULL ) {
_Thread_Clear_state(
executing->Life.terminator,
STATES_WAITING_FOR_TERMINATION
);
}
_Thread_Enable_dispatch();
_Assert_Not_reached();
} else {
_Assert( _Thread_Is_life_restarting( previous_life_state ) );
if ( _Thread_Is_life_terminating( executing->Life.state ) ) {
/* Someone deleted us in the mean-time */
_Thread_Start_life_change_for_executing( executing );
} else {
_Assert( executing->Timer.state == WATCHDOG_INACTIVE );
_Assert(
executing->current_state == STATES_READY
|| executing->current_state == STATES_SUSPENDED
);
executing->Life.state = THREAD_LIFE_NORMAL;
_Thread_Load_environment( executing );
_Thread_Restart_self( executing );
_Assert_Not_reached();
}
}
}