Outline

Put task to sleep (waiting forever).

C format

 ER      slp_tsk (void);

Parameter(s)

None.

Explanation

As a result, the invoking task is unlinked from the ready queue and excluded from the RI600V4 scheduling subject.

If a wake-up request has been queued to the target task (the wake-up request counter > 0) when this service call is issued, this service call does not move the state but decrements the wake-up request counter (by subtracting 1 from the wake-up request counter).

The sleeping state is cancelled in the following cases.

Sleeping State Cancel Operation	Return Value
A wake-up request was issued as a result of issuing wup_tsk.	E_OK
A wake-up request was issued as a result of issuing iwup_tsk.	E_OK
Forced release from waiting (accept rel_wai while waiting).	E_RLWAI
Forced release from waiting (accept irel_wai while waiting).	E_RLWAI

Return value

Macro	Value	Description
E_OK	0	Normal completion.
E_CTX	-25	Context error. - This service call was issued from a non-task. - This service call was issued in the CPU locked state. - This service call was issued in the dispatching disabled state. - This service call was issued in the status "PSW.IPL > kernel interrupt mask level".
E_RLWAI	-49	Forced release from the WAITING state. - Accept rel_wai/irel_wai while waiting.