CriticalSection Class

A CritcalSection is like an un-named Lock. The operating system guarantees not to interrupt a piece of code protected by a CriticalSection.

Unlike a Lock, you do not supply a time limit when requesting critical section.

CriticalSection Creation

The create function is used to create a Lock. The following creates an un-named lock:

    (create CriticalSection)

If this CriticalSection object is shared between threads, it can be used by those threads to synchronise access to another shared resource.

None.

method name	description
`lock`	take the lock -- so that no other thread can take it
`unlock`	release the lock -- so that another thread can take it

Take the lock -- so that no other thread can take it.

Arguments: none.

Return type: the empty List ()

Release the lock -- so that another thread can take it.

Arguments: none

Return type: the empty List ()

Current topic: objects