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From Aaron Bannert <aa...@clove.org>
Subject Re: cvs commit: apr/locks/unix crossproc.c locks.c proc_mutex.c
Date Thu, 04 Apr 2002 20:50:10 GMT
On Thu, Apr 04, 2002 at 03:39:41PM -0500, Jeff Trawick wrote:
> "sem_open("/ApR.whatever", O_CREAT, 0644,1)" returns ENOSYS on Linux
> (2.2.12 kernel).  I'll try to add an autoconf check for that.
> 
> Beyond the issue mentioned above, why is a new lock mechanism
> suddenly so high in the priority list?  Aren't we throwing away a lot
> of past experience (1.3 and 2.0)?

Posix semaphores appear to be the only non-filesystem-based way to
get cross-process mutexes on Darwin. We're looking for a performance
boost above fcntl/flock.

-aaron

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