Mail Archives: cygwin/1998/10/11/13:25:55
This message is in MIME format. The first part should be readable text,
while the remaining parts are likely unreadable without MIME-aware tools.
Send mail to mime AT docserver DOT cac DOT washington DOT edu for more info.
---2138520006-1113834566-908114887=:22891
Content-Type: TEXT/PLAIN; charset=US-ASCII
Thanks to all those who responded to my select() problems. I have found my
solution. Maybe this is what ails some of you with similar problems,
maybe your problem is something different.
To recap, my receiving process was hanging on select() at the start even
though there was data. When a key (even shift) was pressed in the shell
window it would unhang and consume the already waiting data. The other
problem was that all calls to select() after that returned with a value
of 1 even when there was no data on the socket.
It turns out that at run-time or maybe at link time, the select() that is
used is the unix kind that that uses the bit mask to specify what file
descriptors are being watched. However, the include files I was using use
some kind of Windows version that uses a structure with an array in it.
So, when the bitmask version tried to use the structure I was passing it,
it looked like a bitmask that wanted it to check stdin all the time. This
explains the bad behavior. The solution is to simple use the right
include files with the bitmask macros (FD_SET, FD_ZERO, etc.). That way
what I build and pass really is the bitmask and it works just fine.
These are those simple little platform issues that really bite you good.
I hope this helps someone else avoid the watsed hours this cost me.
Attached are my simple demo programs that do it right now. These may be
useful to someone looking for a starting point or to see what they do for
includes that works.
Todd
---2138520006-1113834566-908114887=:22891
Content-Type: TEXT/PLAIN; charset=US-ASCII; name="SimpleServer.C"
Content-Transfer-Encoding: BASE64
Content-ID: <Pine DOT SUN DOT 3 DOT 91 DOT 981011100807 DOT 22891B AT grout>
Content-Description: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---2138520006-1113834566-908114887=:22891
Content-Type: TEXT/PLAIN; charset=US-ASCII; name="SimpleClient.C"
Content-Transfer-Encoding: BASE64
Content-ID: <Pine DOT SUN DOT 3 DOT 91 DOT 981011100807 DOT 22891C AT grout>
Content-Description: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---2138520006-1113834566-908114887=:22891--
-
For help on using this list (especially unsubscribing), send a message to
"gnu-win32-request AT cygnus DOT com" with one line of text: "help".
- Raw text -