Date: Thu, 11 Feb 1999 13:59:52 -0800 (PST) From: Matthew Dillon <dillon@apollo.backplane.com> To: Terry Lambert <tlambert@primenet.com> Cc: peter.jeremy@auss2.alcatel.com.au (Peter Jeremy), tlambert@primenet.com, hackers@FreeBSD.ORG Subject: Re: portability of shm, mmap, pipes and socket IPC Message-ID: <199902112159.NAA95236@apollo.backplane.com> References: <199902112119.OAA10970@usr06.primenet.com>
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:What about a negative initial value setting?
:
:I used this technique on UnixWare to implement an RPC interlock
:mechanism that involved setting things up in shared memory in one
:process, and processing in another; roughly, the following states:
:
:
: 99> ,----.
: | |
: | |
: ,----' |
: ,----. | |
: | | | |
: | | | |
: 0> | | | |
: | `----' |
: | |
: | |
:-99> ----' `-----
: listen call reset
: setup return
:
:I had to implement it a different way on FreeBSD because the
What does POSIX have to say about it?
-Matt
Matthew Dillon
<dillon@backplane.com>
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