Re: Multithreaded file read
Re: Multithreaded file read
- Subject: Re: Multithreaded file read
- From: Jens Alfke <email@hidden>
- Date: Wed, 30 Jul 2008 22:47:26 -0700
On 29 Jul '08, at 11:06 PM, Roger Herikstad wrote:
I have a cocoa program that will read these index files and
fetch the appropriate data from the big file, plot it and store as an
image. I would like to run these print operations in parallel, but I'm
concerned that a conflict will arise if two threads are reading into
the same file.
As long as each thread opens its own file descriptor, you'll be fine.
Each descriptor has its own cursor. The thing you shouldn't do is
share a single file descriptor between threads (unless you use the
pread/pwrite API, which is stateless.)
—Jens
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