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MIME-Version:	1.0
Subject:	RE: muto object.
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Date:	Mon, 17 Sep 2001 12:24:53 +1000
Message-ID:	<EA18B9FA0FE4194AA2B4CDB91F73C0EF08F17C@itdomain002.itdomain.net.au>
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Thread-Topic:	muto object.
Thread-Index:	AcE/H6k9VWCVsUVLTCmRyUtTMGVaIgAAAYRA
From:	"Robert Collins" <robert DOT collins AT itdomain DOT com DOT au>
To:	<cygwin-developers AT cygwin DOT com>
Cc:	<cygwin-patches AT cygwin DOT com>
X-MIME-Autoconverted:	from quoted-printable to 8bit by delorie.com id WAA28975

I'll try finishing the email this time.

What I meant to say was, if this looks ok, it makes muto's a potential
replacement for critical sections on 95 for pthreads, which would be
very good speed wise.

Anyway, I'll draw up a change log and the rest if you want this
included.

Rob

> -----Original Message-----
> From: Robert Collins 
> Sent: Monday, September 17, 2001 12:23 PM
> To: cygwin-developers AT cygwin DOT com
> Cc: cygwin-patches AT cygwin DOT com
> Subject: muto object.
> 
> 
> Chris, 
>   This update to muto handles threads exiting spontaneously without
> releasing the muto properly. I think it fixes the FIXME you have in
> ::release, but as I can't see how release can check for other thread
> activity, it may not have fixed that.
> 
> The logic it uses is:
> if we fail to wait for the event,
> protect ourselves with recover
> check for the thread having died (should be fast - noop basically) and
> if it has aquire the muto anyway.
> 
> There was also a typo in the destructor that could be causing memory
> leaks within process.
> 
> Rob
> 

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