Guardian Procedure Calls Reference Manual (G06.25+)

Guardian Procedure Calls (A-B)
Guardian Procedure Calls Reference Manual—522629-013
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BINSEM_UNLOCK_ Procedure
Considerations
•
The unlock operation and the state of the binary semaphore
•
If the binary semaphore is locked by the calling process, then the value of
error is 0 and the state of the binary semaphore becomes unlocked.
•
If the binary semaphore is either locked by another process, unlocked, or
forsaken, then the value of
error is 4001 and the state of the binary
semaphore remains unchanged.
•
For information about binary semaphores, see “General Considerations for Binary
Semaphores” for the BINSEM_CREATE_ procedure.
Example
error := BINSEM_UNLOCK_( semid );
Related Programming Manuals
For programming information about the BINSEM_UNLOCK_ procedure, refer to the
Guardian Programmer’s Guide.