Received: from SOUTH-STATION-ANNEX.MIT.EDU by po7.MIT.EDU (5.61/4.7) id AA17160; Wed, 13 Mar 96 14:50:15 EST Received: from lennon.CS.Arizona.EDU by MIT.EDU with SMTP id AA16185; Wed, 13 Mar 96 13:53:31 EST Date: Wed, 13 Mar 96 13:53:31 EST From: MAILER-DAEMON@MIT.EDU (Mail Delivery Subsystem) Subject: Returned mail: Host unknown Message-Id: <9603131853.AA16185@MIT.EDU> To: owner-pthreads@MIT.EDU ----- Transcript of session follows ----- 451 luigi@iet.unipi.it... reply: read error 451 luigi@iet.unipi.it... reply: read error 451 ale@vat-vai.valmet.com... reply: read error 451 ale@vat-vai.valmet.com... reply: read error 451 andi@golem.greenie.muc.de... reply: read error 451 andi@golem.greenie.muc.de... reply: read error >>> MAIL From: <<< 452 ... Insufficient disk space; try again later 451 halbhavi@eecs.ukans.edu... reply: read error 451 halbhavi@eecs.ukans.edu... reply: read error 451 jon@sbi.com... reply: read error 451 jon@sbi.com... reply: read error 550 ksuzuki@atlab.base.tuat.ac.jp... Host unknown ----- Unsent message follows ----- Received: from lennon.CS.Arizona.EDU by MIT.EDU with SMTP id AA15796; Wed, 13 Mar 96 13:53:31 EST Received: (from mjk@localhost) by lennon.cs.arizona.edu (8.6.12/8.6.9) id LAA06534; Wed, 13 Mar 1996 11:53:52 -0700 Date: Wed, 13 Mar 1996 11:53:52 -0700 Message-Id: <199603131853.LAA06534@lennon.cs.arizona.edu> From: "Mason J. Katz" To: pthreads@MIT.EDU In-Reply-To: <199603131731.LAA22878@cascade.cs.utexas.edu> (grib@cs.utexas.edu) Subject: Re: What's going on with MIT pthreads? >>>>> "William" == "William S Gribble" writes: William> The remaining problems I have with the 4_1 release I William> haven't been able to precisely pin down, but they're William> related to signals. There are conditions where signals William> just get dropped on the floor.. it happens semi-reliably William> when all threads are blocked on I/O or sleeping. Have William> other people had this problem? I've been able to solve all problems with signals by masking off all signals using sigprocmask() and then dedicating one or more threads to sigwait() for any interested signals. sigwait() is quite nice as it catches signals even when they are masked from the process and you don't have to worry about asych handlers. Does anyone know if sigwait() will catch multiple pending signals of the same type? Last I looked at the source I saw sigwait() clearing a bit telling the thread-kernel the signal was pending. Hence signals could be lost... -- Mason J. Katz mjk@cs.arizona.edu Systems Programmer University of Arizona