Difference between revisions of "MC-Basic:COMMON SHARED ... AS SEMAPHORE"
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Revision as of 14:52, 20 March 2014
Defines new semaphore variables in the system. There are only two function for accessing this variable type: SEMTAKE and SEMGIVE. No other operations (e.g., printing, arguments) are allowed with this data type.
Syntax
COMMON SHARED <semaphore name> AS SEMAPHORE
Availability
All versions
Arrays of semaphores are Since Version 4.9.7
Scope
Configuration, Task, Terminal
Since Version 4.5.17 the global (common shared ) declaration is also possible from the Library context.
Examples
-->common shared sem as semaphore
-->?semtake(sem)
1
-->semgive(sem)
-->