From: Kevin Ryde <user42@zip.com.au>
Subject: Re: Text collation
Date: Sat, 16 Dec 2006 07:52:07 +1100 [thread overview]
Message-ID: <87vekcg9vs.fsf@zip.com.au> (raw)
In-Reply-To: <878xhd33x3.fsf@laas.fr> (Ludovic Courtès's message of "Tue, 12 Dec 2006 09:38:00 +0100")
ludovic.courtes@laas.fr (Ludovic Courtès) writes:
>
> mutex
If you want to think about mutexes, the timezone swapping in stime.c
could stand some attention. When changing the "environ" global
variable it uses the old SCM_CRITICAL_SECTION_START business, which is
a secret mutex. It, and probably your locale bits, should expose
something so C code (including wrappers around external libraries) can
lock down afflicted bits when necessary.
There's no need for a separate mutex for each thing. When an
operation like time conversion or locale query is fast then no
important parallelism is lost by sharing. And if you've got multiple
mutexes that might be acquired all at once then you have to think
about the sequence to do that in, otherwise there's risk of a deadly
embrace.
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next prev parent reply other threads:[~2006-12-15 20:52 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-09-19 9:23 Text collation Ludovic Courtès
2006-09-19 22:38 ` Kevin Ryde
2006-10-22 18:33 ` Ludovic Courtès
2006-10-23 2:01 ` Rob Browning
2006-10-23 7:56 ` Ludovic Courtès
2006-10-24 8:37 ` Rob Browning
2006-10-25 8:16 ` Ludovic Courtès
2006-10-25 8:46 ` Rob Browning
2006-10-25 18:40 ` Neil Jerram
2006-10-25 19:55 ` Rob Browning
2006-10-26 8:47 ` Ludovic Courtès
2006-11-09 7:44 ` Ludovic Courtès
2006-11-09 17:43 ` Rob Browning
2006-11-10 13:39 ` Ludovic Courtès
2006-11-11 15:17 ` Neil Jerram
2006-11-20 13:24 ` Ludovic Courtès
2006-11-21 22:03 ` Neil Jerram
2006-11-22 13:38 ` Ludovic Courtès
2006-10-25 18:43 ` Neil Jerram
2006-10-25 19:31 ` Rob Browning
2006-10-25 18:33 ` Neil Jerram
2006-10-26 8:39 ` Ludovic Courtès
2006-11-29 23:08 ` Kevin Ryde
2006-11-30 15:19 ` Ludovic Courtès
2006-12-02 21:56 ` Kevin Ryde
2006-12-04 9:01 ` Ludovic Courtès
2006-12-05 0:20 ` Kevin Ryde
2006-12-05 18:42 ` Carl Witty
2006-12-05 20:41 ` Kevin Ryde
2006-12-05 22:29 ` Carl Witty
2006-12-05 0:38 ` Kevin Ryde
2006-12-02 22:02 ` Kevin Ryde
2006-12-10 12:30 ` Ludovic Courtès
2006-12-11 22:32 ` Kevin Ryde
2006-12-12 8:38 ` Ludovic Courtès
2006-12-12 20:04 ` Kevin Ryde
2006-12-13 9:41 ` Ludovic Courtès
2006-12-31 17:10 ` Neil Jerram
2006-12-15 20:52 ` Kevin Ryde [this message]
2006-12-12 19:05 ` Kevin Ryde
2006-12-13 9:14 ` Ludovic Courtès
2006-12-12 19:16 ` Kevin Ryde
2006-12-13 9:20 ` Ludovic Courtès
2006-12-12 21:37 ` Kevin Ryde
2006-12-13 9:28 ` Ludovic Courtès
2006-12-13 20:10 ` Kevin Ryde
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