From: Marius Vollmer <mvo@zagadka.ping.de>
Subject: Recursive mutexes?
Date: 26 Oct 2002 22:35:58 +0200 [thread overview]
Message-ID: <87r8edos41.fsf@zagadka.ping.de> (raw)
Our current coop mutexes are not 'recursive'. This means that a
thread blocks when it tries to lock a mutex that it already has
locked.
I think we should make our mutexes be recursive by default. Expecting
to block when locking a mutex that is already lcoked by one self is
not very useful, since no one can unlock that mutex (excepts asyncs).
The only good argument against recursive mutexes that I can think of
is a tiny performance gain since you don't need to do some checking.
SRFI-18 specifies non-recursive mutexes and allows non-owning threads
to unlock a mutex. Such uses of a mutex are, in my view, a mockery of
condition variables should be avoided.
If non-recursive mutexes turn out to be important, we can provide them
as well, as an option.
Ok?
--
GPG: D5D4E405 - 2F9B BCCC 8527 692A 04E3 331E FAF8 226A D5D4 E405
_______________________________________________
Guile-devel mailing list
Guile-devel@gnu.org
http://mail.gnu.org/mailman/listinfo/guile-devel
next reply other threads:[~2002-10-26 20:35 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-10-26 20:35 Marius Vollmer [this message]
2002-10-26 21:39 ` Recursive mutexes? Neil Jerram
2002-10-27 0:03 ` Marius Vollmer
2002-10-27 1:20 ` Thomas Bushnell, BSG
2002-10-27 12:36 ` Marius Vollmer
2002-10-27 7:55 ` Neil Jerram
2002-10-27 18:33 ` Rob Browning
2002-10-26 22:16 ` Rob Browning
2002-10-26 22:29 ` Rob Browning
2002-10-26 22:42 ` Tom Lord
2002-10-26 23:26 ` Thomas Bushnell, BSG
2002-10-26 23:35 ` Tom Lord
2002-10-26 23:50 ` Tom Lord
2002-10-27 1:18 ` Thomas Bushnell, BSG
2002-10-26 22:47 ` Tom Lord
2002-10-27 8:33 ` Neil Jerram
2002-10-27 17:21 ` Tom Lord
2002-10-27 0:35 ` Marius Vollmer
2002-10-27 4:36 ` Rob Browning
2002-10-27 11:32 ` Marius Vollmer
2002-10-27 18:44 ` Rob Browning
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
List information: https://www.gnu.org/software/guile/
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=87r8edos41.fsf@zagadka.ping.de \
--to=mvo@zagadka.ping.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).