Question

NOTES

1) vpiWaiting/Process iterator on mailbox/semaphores will show the processes waiting on the object:

— Waiting process means either frame or task/function handle.

2) vpiMessage iterator shall return all the messages in a mailbox.

3) vpiClassDefn returns the ClassDefn which was used to create the handle. vpiActualDefn returns

the ClassDefn that handle object points to when the query is made. The difference can be seen in

the example below:

class Packet

...

endclass : Packet

class LinkedPacket extends Packet

...

endclass : LinkedPacket

LinkedPacket l = new;

Packet p = l;

In this example, the vpiClassDefn of variable "p" is Packet, but the vpiActualDefn is

"LinkedPacket".

4) vpiClassDefn/vpiActualDefn both shall return NULL for built-in classes.