Re: Does anyone know how to fix Multithreading??

[Richard Levitte - VMS Whacker]

From: Bill Rebey <[EMAIL PROTECTED]>

Bill.Rebey> I based my product on OpenSSL with the understanding that
Bill.Rebey> OpenSSL was multi-thread safe.  It has since been brought
Bill.Rebey> to my attention that OpenSSL in fact NOT thread safe and
Bill.Rebey> can not read and write the same SSL from two different
Bill.Rebey> threads.

True, that aspect of OpenSSL is lacking...

Bill.Rebey> Does anyone know how I can fix the OpenSSL code so that
Bill.Rebey> this works?  Does anyone even know what things in the SSL
Bill.Rebey> are thread-Unsafe so that I might know where to begin
Bill.Rebey> looking?

One quick if not easy way to deal with it is to make your own wrappers
around SSL_read() and SSL_write(), using SSL-specific locks.  You can
associate the lock handles with the SSL structures through the ex_data
member.

Doing it directly in OpenSSL is bulky at best right now, and also
needs to be handled in a very general way, keeping in consideration
that on Windows, handles are a limited resource.  I've some ideas on
how to go around that with an OpenSSL-specific lock implementation
(I've mentioned it before, I think).

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