Threads share U area , thats where file descripters are stored for your process. All threads are in one process. I sedjest using semaphors for contolling access to any resources.
Mark ----- Original Message ----- From: "Beau E. Cox" <[EMAIL PROTECTED]> To: "'Beginners" <[EMAIL PROTECTED]> Sent: Wednesday, January 15, 2003 4:41 AM Subject: How 'global' are STDIN/STDOUT/STDERR? > Hi all - > > I am developing a perl 5.8 application using the > new threading model. I use this technique > (thanks Jenda!) to dup STDIN to a temp file handle: > ... > open SAVIN, '<&STDIN'; > open (STDIN,'<&' . $tmpfh->fileno) or die "..."; > my $out = `some-command 2>&1`; > open STDIN, '<&SAVIN'; > close $tmpfh; > ... > in various threads. All works - the command run > reads from STDIN and output to STDOUT (maybe > STDERR also). I get the output in $out. > > My question: how 'global' is STDIN? Must I place > a lock on some dummy shared variable when using > STDIN in a thread, in other words, will all > threads 'see' the dup of STDIN? > > Aloha => Beau; > > > -- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
