From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chris Faylor To: Tom Lane Cc: Horak Daniel , "'pgsql-hackers@postgreSQL.org'" , "'cygwin@sourceware.cygnus.com'" , "'Joost Kraaijeveld'" Subject: Re: [HACKERS] backend freezeing on win32 fixed (I hope ;-) ) Date: Mon, 16 Aug 1999 10:08:00 -0000 Message-id: <19990816130949.A1087@cygnus.com> References: <2E7F82FAC1FCD2118E1500A024B3BF907DED3B@exchange.mmp.plzen-city.cz> <601.934812420@sss.pgh.pa.us> X-SW-Source: 1999-08/msg00282.html On Mon, Aug 16, 1999 at 10:07:00AM -0400, Tom Lane wrote: >Is it possible that the CygWin environment doesn't have a correct >emulation of IPC semaphores, such that a sema allocated by one process >(the postmaster) is not available to other procs (the backends)? >That would explain preallocation not working --- but if that's it then >we have major problems in other places, since the code assumes that a >sema once allocated will remain available to later backends. We don't have correct emulation of IPC semapahores since they are not implemented at all. I assume that if you're relying on persistent semaphores, then some add-on package is being used. cgf -- Want to unsubscribe from this list? Send a message to cygwin-unsubscribe@sourceware.cygnus.com From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chris Faylor To: Tom Lane Cc: Horak Daniel , "'pgsql-hackers@postgreSQL.org'" , "'cygwin@sourceware.cygnus.com'" , "'Joost Kraaijeveld'" Subject: Re: [HACKERS] backend freezeing on win32 fixed (I hope ;-) ) Date: Tue, 31 Aug 1999 23:49:00 -0000 Message-ID: <19990816130949.A1087@cygnus.com> References: <2E7F82FAC1FCD2118E1500A024B3BF907DED3B@exchange.mmp.plzen-city.cz> <601.934812420@sss.pgh.pa.us> X-SW-Source: 1999-08n/msg00282.html Message-ID: <19990831234900.Oe8uycC5biRozLDgWpi2le6hohoqOOJvc8W8xbc7liU@z> On Mon, Aug 16, 1999 at 10:07:00AM -0400, Tom Lane wrote: >Is it possible that the CygWin environment doesn't have a correct >emulation of IPC semaphores, such that a sema allocated by one process >(the postmaster) is not available to other procs (the backends)? >That would explain preallocation not working --- but if that's it then >we have major problems in other places, since the code assumes that a >sema once allocated will remain available to later backends. We don't have correct emulation of IPC semapahores since they are not implemented at all. I assume that if you're relying on persistent semaphores, then some add-on package is being used. cgf -- Want to unsubscribe from this list? Send a message to cygwin-unsubscribe@sourceware.cygnus.com