Date: Fri, 25 Dec 2009 09:15:45 +0800 From: David Xu <davidxu@freebsd.org> To: John Baldwin <jhb@freebsd.org> Cc: freebsd-threads@freebsd.org Subject: Re: first patch for process-shared semaphore Message-ID: <4B341241.9090208@freebsd.org> In-Reply-To: <200912240755.11841.jhb@freebsd.org> References: <4B317741.8080004@freebsd.org> <200912230936.35998.jhb@freebsd.org> <4B32C1DC.9080308@freebsd.org> <200912240755.11841.jhb@freebsd.org>
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John Baldwin wrote: > Yes, Solaris uses files in /tmp and Darwin uses special file descriptors > similar to what we do. However, you will have to restrict the namespace if > you go the /tmp route to be safe I think similar to what Solaris does (no path > separators, just simple names like 'foo'). I will only allow names like /XXX, make sure to be compatible with current implementation. > You might also want to use the > same naming convention as Solaris if you go the /tmp route (I think they use a > path other than .semaphore under /tmp IIRC). What is their name convention? The patch just create all semaphore files in directory /tmp/.semaphore and semaphore name is not changed. > Not sure if we want to do > anything special to ensure that those particular set of files in /tmp always > get purged on reboot to avoid weird bugs with semaphores unexpectedly > persisting across reboots. > Yes, this is an issue, I would like to purge it on reboot.
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