Outline

Release task from waiting.

C format

ER rel_wai ( ID tskid ); ER irel_wai ( ID tskid );

Assembly format

MOV A, #tskid CALL !!_rel_wai MOV A, #tskid CALL !!_irel_wai

Parameter(s)

I/O	Parameter	Description
I	ID tskid;	ID number of the task to be released from waiting.

Explanation

These service calls forcibly cancel the WAITING state of the task specified by parameter tskid.

As a result, the target task unlinked from the wait queue and is moved from the WAITING state to the READY state, or from the WAITING-SUSPENDED state to the SUSPENDED state.

"E_RLWAI" is returned from the service call that triggered the move to the WAITING state (slp_tsk, wai_sem, or the like) to the task whose WAITING state is cancelled by this service call.

Note 1 If the target task is moved to the READY state after this service call is issued, this service call also re-queues the task at the end of the ready queue corresponding to the priority of the task.

Note 2 This service call does not perform queuing of forced cancellation requests. If the target task is in a state other than the WAITING or WAITING-SUSPENDED state, "E_OBJ" is returned.

Return value

Macro	Value	Description
E_OK	0	Normal completion.
E_OBJ	-41	Object state error (specified task is neither in the WAITING state nor WAITING-SUSPENDED state).