can_wup

ican_wup

Outline

Cancel task wake-up requests.

C format

 ER_UINT can_wup (ID tskid);
 ER_UINT ican_wup (ID tskid);
Parameter(s)

I/O

Parameter

Description

I

 ID      tskid;
ID number of the task.

TSK_SELF: Invoking task.

Value: ID number of the task.



Explanation

These service calls cancel all of the wake-up requests queued to the task specified by parameter tskid (the wake-up request counter is set to 0), and return the number of cancelled wake-up requests.

Return value

Macro

Value

Description

E_ID

-18

Invalid ID number.

- tskid < 0

- tskid > VTMAX_TSK

- When this service call was issued from a non-task, TSK_SELF was specified for tskid.

E_CTX

-25

Context error.

- This service call was issued in the CPU locked state.

- This service call was issued in the status PSW.IPL > kernel interrupt mask level.

Note When the ican_wup is issued from task or the can_wup is issued from non-task, the context error is not detected and normal operation of the system is not guaranteed.

E_OBJ

-41

Object state error.

- Specified task is in the DORMANT state.

-

0 or more

Normal completion (wake-up request count).