Ok, I think we're on the same page now. With Stephen's explanation and your last remark it clicked into place. Can't read from 2 threads at the same time, and SSL doesn't implement locking for it, so can't call SSL_Read and SSL_Write at the same time.
Thanks, and sorry for not being quicker on the uptake! --- Frédéric_Giudicelli <[EMAIL PROTECTED]> wrote: > ----- Original Message ----- > From: "Olia Kerzhner" <[EMAIL PROTECTED]> > To: <[EMAIL PROTECTED]> > Sent: Tuesday, January 06, 2004 12:16 AM > Subject: Re: OpenSSL: threading question > > > > > > Do you agree that read/write from 2 different > > > threads > > > > is acceptable with plain SOCKETs? > > > It works on writes, not on reads. > > > Do the test, you will see. The behavior is > > > unpredictable on blocking and > > > non-blocking sockets. > > > It might work 99,9% of the time, it one threads > > > picks up the datas before > > > the other, in some cases you might end up with a > > > dead-lock. > > > Plus on writes, don't forget the Nagle > algorithm, > > > you might have some weird > > > stuff happening. > > > > > > > Are you talking about 2 threads, when one only > reads, > > and another only writes? I know you can't have 2 > > threads reading at the same time, or writing at > the > > same time. > Ok, you should have mentionned that since the > beginning :) > All Stephen and I were trying to tell you, was that > in some cases using > SSL_read and SSL_write, you could end up having two > threads reading from the > same SOCKET. > > That's why I preconized some subclassing to > "protect" the access to SSL_read > and SSL_write. > > Fred. > > ______________________________________________________________________ > OpenSSL Project > http://www.openssl.org > User Support Mailing List > [EMAIL PROTECTED] > Automated List Manager [EMAIL PROTECTED] __________________________________ Do you Yahoo!? Find out what made the Top Yahoo! Searches of 2003 http://search.yahoo.com/top2003 ______________________________________________________________________ OpenSSL Project http://www.openssl.org User Support Mailing List [EMAIL PROTECTED] Automated List Manager [EMAIL PROTECTED]
