Guardian Procedure Calls Reference Manual

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 more information about binary semaphores, see General Considerations for Binary
Semaphores (page 89).
Example
error := BINSEM_UNLOCK_( semid );
Related Programming Manuals
For programming information about the BINSEM_UNLOCK_ procedure, see the Guardian
Programmer's Guide.
106 Guardian Procedure Calls (A-B)