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Old 10-01-2008, 01:04 PM   #1
Registered: May 2007
Distribution: slackware
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manipulating one file resource with multiple threads

hi all
I need to write in one file resource with multiple threads because each section of this file belong to one thread (assume it is multithread download manager)
now i don`t know is that possible writing simultaneously on this file without using mutex
Old 10-01-2008, 04:25 PM   #2
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Registered: Sep 2003
Location: Ottawa, Canada
Distribution: Ubuntu
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In this scenario, without knowing anything else about the problem, I would set up one thread as the 'File Writer' thread and a shared buffer (or a threaded object... not sure what kind of programming environment you're in).

Assuming you're in a C environment and using a shared buffer, protect it with a semaphore. Every time you write to it, post to the semaphore. Have the file writer thread pending on the semaphore and then empty the buffer into the appropriate section of the file.

Hope this helps, Cheers.


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