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Read some texts about locking in PHP.
They all, mainly, direct to http://php.net/manual/en/function.flock.php .
This page talks about opening a file on the hard-disk!!
Is it really so? I mean, this makes locking really expensive - it means each time I want to lock I'll have to access the hard-disk…
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What's the difference between a monitor and a lock?
If a lock is simply an implementation of mutual exclusion, then is a monitor simply a way of making use of the waiting time inbetween method executions?
A good explanation would be really helpful thanks....
regards
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Say I have a web service where I want to serve the content only once. After it is served any other access to that url should generate an error message.
How would I go about doing something like this? What if 2 clients access the url in the same exact moment?
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We have a long running user operation that is handled by a pool of worker processes. Data input and output is from Azure SQL.
The master Azure SQL table structure columns are approximated to
[UserId, col1, col2, ... , col N, beingProcessed, lastTimeProcessed ]
beingProcessed is boolean and lastTimeProcessed…
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If I have a list of regular expressions, is there an easy way to determine that no two of them will both return a match for the same string?
That is, the list is valid if and only if for all strings a maximum of one item in the list will match the entire string.
It seems like this will be very hard…
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