clear

The keyword is used to remove the contents of the incoming queue of the specified communication port.

• The operation is valid for both message and procedure based ports.
• It is possible to clear all defined ports.
• If the port queue is already empty then this operation has no action.

Related keywords:

• all
• port

• port_reference points out the port to be cleared.

  • the keywords all port may be used to indicate that all defined ports must be cleared (see the example 2).

• The clear keyword introduces port cleansing.

Example 1:

Kapu_PCO.clear;

The port Kapu_PCO will be cleared.

Example 2:

all port.clear;

The incoming queues of all defined ports will be emptied.

BNF definition of clear