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Is write() thread safe?

From: Gavin Li <gavinl at optech dot ca>
To: libc-alpha at sources dot redhat dot com
Date: Wed, 14 Sep 2005 15:57:27 -0400
Subject: Is write() thread safe?

I open a fifo=open("/dev/rtf0", WR_ONLY); and I have two threads write to
this fifo. Is this write() function threadsafe, or I have to use mutex to
protect fifo?

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