can_act

ican_act

Outline

Cancel task activation requests.

C format

 ER_UINT can_act (ID tskid);

 ER_UINT ican_act (ID tskid);

Parameter(s)

I/O	Parameter	Description
I	ID tskid;	ID number of the task for cancelling activation requests. TSK_SELF: Invoking task. Value: ID number of the task for cancelling activation requests.

Explanation

This service call cancels all of the activation requests queued to the task specified by parameter tskid (sets the activation request counter to 0x0).

When this service call is terminated normally, the number of cancelled activation requests is returned.

Note This service call does not perform status manipulation processing but performs the setting of activation request counter. Therefore, the task does not move from a state such as the READY state to the DORMANT state.

Return value

Macro	Value	Description
E_ID	-18	Invalid ID number. - tskid < 0x0 - tskid > Maximum ID number - When this service call was issued from a non-task, TSK_SELF was specified tskid.
E_CTX	-25	Context error. - This service call was issued in the CPU locked state.
E_NOEXS	-42	Non-existent object. - Specified task is not registered.
-	Positive value	Normal completion (activation request count).