INtime® 3.1 Software - tenAsys

Chapter 3: About INtime software’s RT kernel
Object directories
Each process has an associated object directory. When a thread creates an object, the
RT kernel creates a handle for it. A thread can catalog a high-level object, with its
handle and a corresponding name, in the object directory of its own process or any
other process it knows about. Typically, you catalog objects in the root directory so that
threads in other processes can access them.
Threads that know the name can use the object directory to look up and access objects.
Threads in the same process also can use global variables to identify and access objects
within their process.
Note
You cannot catalog the handle for a low-level object in an object directory.
Figure 3-2. Threads using the root process's object directory
A
B
Thread A catalogs an object such as a data mailbox in the root process's object directory.
Thread B looks up the object in the object directory to use it.
Now thread A can send data to the mailbox and thread B can receive it.
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