From: Dale Martenson <dmartenson@...>
Date: 2002-03-28T00:09:38+09:00
Subject: RE: File change notification?

Hello,

Nobu Nakada wrote:

>>     # Wait for notification.
>>  
>>    dwWaitStatus = k32WaitForMultipleObjects.Call(2, lp_dwChangeHandles, 
>>        0, INFINITE) 
>
>Note that this call blocks all threads completely.

You are correct. It would be better to specify a timeout on the
WaitForMultipleObjects call. You could do something like:

# Add a constant for the timeout return value
WAIT_TIMEOUT  = 0x00000102   

# . . . inside the while-loop

    # Change the wait to have a timeout. In this case, 2 seconds.
    dwWaitStatus = k32WaitForMultipleObjects.Call(2, lp_dwChangeHandles, 
        0, 2000 )  

    # If desired, modify the case-statement to act on the timeout condition

	when WAIT_TIMEOUT
	    print "#{Time.now}: Nothing happened yet\n"

-- Dale