From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.org/gmane.linux.lib.musl.general/8982 Path: news.gmane.org!not-for-mail From: Jens Gustedt Newsgroups: gmane.linux.lib.musl.general Subject: stdatomic implementation Date: Sun, 13 Dec 2015 11:01:22 +0100 Message-ID: <1450000882.317.5.camel@inria.fr> Reply-To: musl@lists.openwall.com NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: multipart/signed; micalg="pgp-sha1"; protocol="application/pgp-signature"; boundary="=-a+dAmjAAmETjeBCMgypF" X-Trace: ger.gmane.org 1450000929 5633 80.91.229.3 (13 Dec 2015 10:02:09 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sun, 13 Dec 2015 10:02:09 +0000 (UTC) To: musl@lists.openwall.com Original-X-From: musl-return-8995-gllmg-musl=m.gmane.org@lists.openwall.com Sun Dec 13 11:02:04 2015 Return-path: Envelope-to: gllmg-musl@m.gmane.org Original-Received: from mother.openwall.net ([195.42.179.200]) by plane.gmane.org with smtp (Exim 4.69) (envelope-from ) id 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Cj15cu23XZI4/826Px/xqB37z547sPH374oOvnKTsOb+1zuCoImZARM8ZiLlKkXcWOcoFRJ+Do/CwFO4e2DEe+9Ti+ZXA8ny/cU+X4bMKRZxZIVEiqXI6/+NKuUzPHb7z40ovnX3zx+Ctuq38HyuqWG7Tu+A0AAAAASUVORK5CYII= X-Mailer: Evolution 3.12.9-1+b1 Xref: news.gmane.org gmane.linux.lib.musl.general:8982 Archived-At: --=-a+dAmjAAmETjeBCMgypF Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hello everybody, as Rich suggested at some point, I have now wrapped up my code for the library part of atomics in a standalone library. I should work with most versions of gcc or clang that are around, with evidently a different degree of C11 support according to the particular version. Its integration into musl should be straight forward and remains my primary choice for having it distributed. You can find it at stdatomic.gforge.inria.fr Under the hood it uses a new lock algorithm based on futex waits for the slow path, that has proven to be more efficient than anything else that I looked at: musl's internal lock, mtx_t or pthread_mutex_t, or spinlocks. You can find a discussion of that at https://hal.inria.fr/hal-01236734 Before I go (more) public with this, I would very much like to hear what you think. Thanks Jens --=20 :: INRIA Nancy Grand Est ::: Camus ::::::: ICube/ICPS ::: :: ::::::::::::::: office Strasbourg : +33 368854536 :: :: :::::::::::::::::::::: gsm France : +33 651400183 :: :: ::::::::::::::: gsm international : +49 15737185122 :: :: http://icube-icps.unistra.fr/index.php/Jens_Gustedt :: --=-a+dAmjAAmETjeBCMgypF Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iEYEABECAAYFAlZtQfIACgkQD9PoadrVN+KEyQCeLw7vBVntQvo20a07EXsVPigT HLMAnRVv8tTeWb/lLDLrhshjXK8jOWTb =bhSc -----END PGP SIGNATURE----- --=-a+dAmjAAmETjeBCMgypF--