Sockets and threads...

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I want to open some sockets in one thread and write to them from my main
process and think this is very doable.  I've been looking around a lot
for answers to this and I think I've figure it out but would like to
hear if my thinking is indeed correct:

Sockets are global to the process/threads already and so you don't have
to pass around file descriptors to make them visible to the main
process.  I had tried (and failed) to share descriptors and failed
because they're not simple variables.

Looking at some code snippets it feels like all I need to do is get the
file number from $descriptor->fileno() and share that.

One way to convert a file number, assuming it's in $fn back to a
descriptor is the following:

open ($fd, ">&$fn);

and now I can syswrite() to it back in my main code.  At least it seems
to be working correctly.  Is this indeed the 'preferred' way to do this?
  Am I missing something?  Is there a better way?


Re: Sockets and threads...


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Sharing filhandles thru the fileno is the way to go with threads.


for some ideas.


Re: Sockets and threads...

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yes, clearly the way to go!  I now have a thread that listens for
connections, accepts them and writes the fileno into a share array.

Re: Sockets and threads...

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Open a socket to what?  Are you opening sockets "internally" from one
thread to another within the same process?  Is the "open" doing the accept,
or the connect?

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Can you show code to illustrate this problem?

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That only works if you only need to write on the socket.  I can't
figure out how to open if you need both read and write.

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In most cases I can dream up in which I might want to use this, I suspect
I'd prefer to arrange the code differently in the first place.


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