T-Kernel Specification (1.B0.02)

58 CHAPTER 4. T-KERNEL/OS FUNCTIONS
Target Task State tk rel tsk ercd Parameter Processing
Run state (RUN, READY) E OBJ No operation
(not for invoking task)
RUN state E OBJ No operation
(for invoking task)
WAIT state E OK Wait released ∗
DORMANT state E OBJ No operation
NON-EXISTENT state E NOEXS No operation
∗ Error code E RLWAI is returned to the target task. The target task is guaranteed to be
released from its wait state without any resource allocation (without the wait release conditions
being met).
Table 4.3: Task States and Results of tk rel wai Execution
• Seen from the task in WAIT state, release of the WAIT state by tk wup tsk returns a Normal
completion (E OK), whereas release by tk rel wai returns an error code (E RLWAI).
• Wakeup requests by tk wup tsk are queued if tk slp tsk has not yet been executed. If tk rel wai
is issued for a task not in WAIT state, error code E OBJ is returned.
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T-Kernel 1.B0.02