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Re: Cygwin 1.7-1 - non-blocking IO problem
On 12/28/2009 08:03 AM, Uri Simchoni wrote:
Hi,
I'm porting an application to Cygwin (1.7-1) and have encountered a
problem related to non-blocking IO. It appears that write to a socket blocks
in non-blocking mode blocks. I've narrowed it down to the attached program.
The program creates 2 socket pairs, then forks and communicates to the
child through these pairs. The parent process writes 1MB then reads 1MB, and
repeats that 10 times. The child waits a while, then starts writing 10MB
while also reading from the other pair in a non-blocking fashion.
- On Cygwin 1.7-1 it hangs - If I replace the socketpair() by a pipe() it
works (it's possible because I make a uni-directional use with each socket pair).
- It seems that the problem also happens with TCP sockets. - On Linux it
works with the socketpair() - On Cygwin 1.5.25 it also works (it hanged
some of the times but I believe it has to do with my installation)
Please advise.
Wrong list. Problem reports go to the main Cygwin list.
See <http://cygwin.com/lists.html>.
--
Larry Hall http://www.rfk.com
RFK Partners, Inc. (508) 893-9779 - RFK Office
216 Dalton Rd. (508) 893-9889 - FAX
Holliston, MA 01746
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