X-Recipient:	archive-cygwin AT delorie DOT com
DomainKey-Signature:	a=rsa-sha1; c=nofws; d=sourceware.org; h=list-id
	:list-unsubscribe:list-subscribe:list-archive:list-post
	:list-help:sender:date:from:to:subject:message-id:reply-to
	:references:mime-version:content-type:in-reply-to; q=dns; s=
	default; b=DmqEYTDaUqZjLoTiSXahx9fENh8OtXG9+VKAgB0giwLf2RDVVt+Sj
	wtDt5qEk5nXAmKueCJwkM1W04EPcNnxzAVFQa/JIKwOA1/4yk0ADUIsyCQ73MVdt
	3Che7KGUrW4kyoewrh3jNqYwJJie/CCwIyUVL6Pc9KmloXOJA16D7k=
DKIM-Signature:	v=1; a=rsa-sha1; c=relaxed; d=sourceware.org; h=list-id
	:list-unsubscribe:list-subscribe:list-archive:list-post
	:list-help:sender:date:from:to:subject:message-id:reply-to
	:references:mime-version:content-type:in-reply-to; s=default;
	bh=cO0jUfSvYol+YDpm2Zqolgzvrlo=; b=pLGxRMbs1Xt1BXi1d7mS7KfOgYu1
	F0Lmqwv9FIj+bnDjmqpte3An2GUOoJgkPBKbdonlLNjFxRbIfqjQsTVA5x2eg+VM
	q8tA/gEqU5AyVQJWqs/w3146O2ou69xnZ7ydl77mlGAAPo1jOFP5SCpY+8TGCDf4
	Gk/8kabi7bAz50o=
Mailing-List:	contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Id:	<cygwin.cygwin.com>
List-Subscribe:	<mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive:	<http://sourceware.org/ml/cygwin/>
List-Post:	<mailto:cygwin AT cygwin DOT com>
List-Help:	<mailto:cygwin-help AT cygwin DOT com>, <http://sourceware.org/ml/#faqs>
Sender:	cygwin-owner AT cygwin DOT com
Mail-Followup-To:	cygwin AT cygwin DOT com
Delivered-To:	mailing list cygwin AT cygwin DOT com
X-Spam-SWARE-Status:	No, score=-1.8 required=5.0 tests=AWL,BAYES_00,TW_FC autolearn=ham version=3.3.1
Date:	Fri, 31 May 2013 11:22:28 +0200
From:	Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To:	cygwin AT cygwin DOT com
Subject:	Re: sqlite3: bug with monotone
Message-ID:	<20130531092228.GB30659@calimero.vinschen.de>
Reply-To:	cygwin AT cygwin DOT com
Mail-Followup-To:	cygwin AT cygwin DOT com
References:	<51A6B6EB DOT 6050309 AT users DOT sourceforge DOT net> <loom DOT 20130530T122354-144 AT post DOT gmane DOT org> <51A7862F DOT 1070507 AT etr-usa DOT com> <51A7D47E DOT 3050502 AT users DOT sourceforge DOT net> <51A7F547 DOT 6020509 AT etr-usa DOT com>
MIME-Version:	1.0
In-Reply-To:	<51A7F547.6020509@etr-usa.com>
User-Agent:	Mutt/1.5.21 (2010-09-15)

On May 30 18:56, Warren Young wrote:
> 1. We continue waiting for someone to to implement a per-process or
> per-subtree mandatory locking feature in Cygwin, so that "Unix mode"
> SQLite on Cygwin can be configured to cooperate with native SQLite.

What kind of locking does sqlite use on Cygwin:

[ ] POSIX fcntl locks
[ ] BSD flock locks
[ ] Old POSIX lockf locks?

Here's a proposal:

- Only add optional mandatory locking to fcntl and flock locks, not for
  lockf locks.

- Add a flag F_MDLCK which can be or'ed to struct flock's l_type.

- Add a flag LOCK_MD which can be or'ed to the 2nd parameter to flock(2).

- Using these flags, I'll resurrect the old pre-Cygwin 1.7 locking code
  which does NOT support F_GETLK.  I will try, but I can also not
  guarantee that a blocking, mandatory lock call will be interruptible
  by signals.

- For anything else, http://cygwin.com/acronyms/#PTC


Does that sound ok?


Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat

--
Problem reports:       http://cygwin.com/problems.html
FAQ:                   http://cygwin.com/faq/
Documentation:         http://cygwin.com/docs.html
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple

- Raw text -