Difference between revisions of "MC-Basic:SEMAPHORESTATE"
| (One intermediate revision by one other user not shown) | |||
| Line 1: | Line 1: | ||
| + | {{Languages|MC-Basic:SEMAPHORESTATE}} | ||
{{MC-Basic | {{MC-Basic | ||
|SHORT FORM= | |SHORT FORM= | ||
| Line 61: | Line 62: | ||
* [[MC-Basic:SEMAPHOREGIVE|SEMAPHOREGIVE]] | * [[MC-Basic:SEMAPHOREGIVE|SEMAPHOREGIVE]] | ||
| − | [[Category | + | [[Category:MC-Basic:Semaphore Handling|SEMAPHORESTATE]] |
}} | }} | ||
Latest revision as of 03:09, 28 April 2017
| Language: | English • 中文（简体） |
|---|
SEMSTATE returns the semaphore status : 1 , if the semaphore is taken before (busy) or 0 , if the semaphore is released .
Works for Global user-semaphores , Structure-element semaphores , the semaphores passed by-reference (within a function \ sub block).
Short form
semstate
Syntax
?semstate(<semaphore name>)
Availability
Since Version 3.7.x
Range
0 , 1
Scope
Task, Terminal
Limitations
A semaphore passed by-reference (within a function \ sub block).
Examples
-->common shared sem1 as semaphore
-->?SemState(sem1)
-->0
-->?SemTake(sem1)
-->1
-->?semstate(sem1)
-->1
-->?SemState(sem1)
-->1
-->SemGive(sem1)
-->?SemState(sem1)
-->0