From: "Bart Schaefer" <schaefer@candle.brasslantern.com>
To: Peter Stephenson <pws@csr.com>,
zsh-workers@sunsite.auc.dk (Zsh hackers list)
Subject: Re: PATCH: Re: Allowing traps
Date: Thu, 23 Nov 2000 21:58:04 +0000 [thread overview]
Message-ID: <1001123215804.ZM13478@candle.brasslantern.com> (raw)
In-Reply-To: <0G4H00BMAYYZB4@la-la.cambridgesiliconradio.com>
On Nov 23, 9:42pm, Peter Stephenson wrote:
} Subject: Re: PATCH: Re: Allowing traps
}
} Bart wrote:
} > We could start by wrapping every function in mem.c with queue_signals()/
} > unqueue_signals(). That'd probably take care of a lot of the problems.
}
} We did something pretty similar some time ago (1992?) --- the performance
} hit was ghastly, so we removed it.
The something similar was to actually block and unblock the signals, which
meant two system calls on every operation; queue_signals() does nothing but
increment/decrement a counter unless a signal actually arrives.
I definitely am not recommending blocking and unblocking signals here.
--
Bart Schaefer Brass Lantern Enterprises
http://www.well.com/user/barts http://www.brasslantern.com
Zsh: http://www.zsh.org | PHPerl Project: http://phperl.sourceforge.net
next prev parent reply other threads:[~2000-11-23 21:58 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-11-23 8:11 Sven Wischnowsky
2000-11-23 19:14 ` Bart Schaefer
2000-11-23 21:42 ` Peter Stephenson
2000-11-23 21:58 ` Bart Schaefer [this message]
2000-11-23 22:05 ` Bart Schaefer
-- strict thread matches above, loose matches on Subject: below --
2000-11-24 8:06 Sven Wischnowsky
2000-11-20 16:54 Peter Stephenson
2000-11-20 17:39 ` PATCH: " Bart Schaefer
2000-11-22 17:33 ` Bart Schaefer
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