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ref_tst

Outline

Reference task state (simplified version).

C format

 ER      ref_tst (ID tskid, T_RTST *pk_rtst);

 ER      iref_tst (ID tskid, T_RTST *pk_rtst);

Parameter(s)


I/O	Parameter	Description
I	ID tskid;	ID number of the task to be referenced. TSK_SELF: Invoking task. Value: ID number of the task to be referenced.
O	T_RTST *pk_rtst;	Pointer to the packet returning the task state.

[Task state packet (simplified version): T_RTST]


typedef struct t_rtst { STAT tskstat; /Current state/ STAT tskwait; /Reason for waiting/ } T_RTST;

Explanation

Stores task state packet (current state, reason for waiting) of the task specified by parameter tskid in the area specified by parameter pk_rtst.

Used for referencing only the current state and reason for wait among task information.

Response becomes faster than using ref_tsk or iref_tsk because only a few information items are acquired.

Note For details about the task state packet (simplified version), refer to "15.2.2 Task state packet (simplified version)".

Return value


Macro	Value	Description
E_OK	0	Normal completion.
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.