Question

What happens when a program calls the GetMessageWin32 API and there are no messages in the queue?

a.

The program stalls and does not return

b.

The kernel saves the entire processor state and switches to run another thread

c.

The kernel interrupts the thread and runs another one

d.

The program continues running without any input

Posted under Reverse Engineering

Answer: (b).The kernel saves the entire processor state and switches to run another thread Explanation:GetMessage just enters a waiting mode and doesn’t return until new user input becomes available...At this point the kernel saves the entire processor state and switches to run another thread.

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Q. What happens when a program calls the GetMessageWin32 API and there are no messages in the queue?

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