Regarding 'msgtype' attribute in 'msgbuf' (while using message queues)

[LShivaRudra]

According to the problem statement and the following:

Planes, Airports and Cleanup will send and recv msgs only from ATC. ATC will communicate with all the three.

Planes:

• Send plane data
• Wait for the termination condition from the ATC after they land(since I found nothing relevant to plane processes regarding departure)

ATC:

• Gets plane data from plane process, check the departure airport and send necessary message to departure airport.
• Gets confirmation from the departure airport that takeoff was successful
• Informs arrival airport plane details and reg arrival of plane.
• Gets confirmation from the arrival airport that the deboarding is done.
• Informs and sends termination msg to plane process
• Receives termination msg from the cleanup process

Cleanup:

• When Y is entered in the terminal, sends termination msg to the ATC and itself terminates.

Airport:

• Gets plane details from ATC(arrival airport gets arrival details also)
• For departure airport, a thread of this process will send msg to ATC that plane with specific id has taken off
• For arrival airport, sends confirmation to ATC after deboarding.

[LShivaRudra]

So, the 'msgtype' can be assigned as follows:

• Planes:1-10(based on the plane id)
• ATC: 22
• Airport: 10-20(based on airport id). They can identify themselves as departure/arrival airports based on the plane data
• Cleanup: 21