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What situation we need to use the enqueue/dequeue statement

 
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rainye

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Joined: 11 Jul 2006
Posts: 8

PostPosted: Sat Jul 22, 2006 10:23 pm    Post subject: What situation we need to use the enqueue/dequeue statement
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I have read some manuals already but I still do not know in what situation we need to use the enqueue/dequeue statement.


Another question, when I testing a program, it always come to "queue busy" when the enqueue resource(XXAA) statement is executed. But I try the same statement enqueue resource(XXAA) statement and the response is normal, any one can explain this for me ?


Thanks !
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Hanfur

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Joined: 21 Jun 2006
Posts: 104

PostPosted: Mon Jul 24, 2006 12:16 pm    Post subject: Hi
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Its for exclsuive locking of resource..This comes in secnarios where multiple browse/update operation is required for the same file TSQ,TDQ etc.

Once Enqued its has to be dequeued for making it available to others..


-Han.
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