Guardian Procedure Calls Reference Manual

Considerations
NOTE: There are additional considerations for privileged callers.
• The close operation and the state of the binary semaphore
If the binary semaphore is locked by the calling process, then the value of error is 4045,
the state of the binary semaphore remains unchanged, and the specified binary semaphore
ID can continue to provide access to the binary semaphore.
◦
◦ If the binary semaphore is either unlocked, forsaken, or locked by another process, then
the value of error is 0, the state of the binary semaphore remains unchanged (provided
that this is not the last close of the binary semaphore), and the specified binary semaphore
ID can no longer provide access to the binary semaphore.
• When there are no more concurrent opens of the binary semaphore, space used by the binary
semaphore is returned to the system main-memory pool.
• A closed binary semaphore ID can be reassigned on subsequent calls to the BINSEM_CREATE_
and BINSEM_OPEN_ procedures.
• For more information about binary semaphores, see General Considerations for Binary
Semaphores (page 89).
Example
error := BINSEM_CLOSE_( semid );
Related Programming Manuals
For programming information about the BINSEM_CLOSE_ procedure, see the Guardian
Programmer's Guide.
BINSEM_CLOSE_ Procedure 87