From mboxrd@z Thu Jan 1 00:00:00 1970 From: Michael Kerrisk Subject: Re: [PATCH] fmtmsg.3: ATTRIBUTES: Note function that is thread-safe Date: Sat, 18 May 2013 20:15:58 +0200 Message-ID: <5197C55E.5060704@gmail.com> References: <1366861744-16118-1-git-send-email-penght@cn.fujitsu.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1366861744-16118-1-git-send-email-penght-BthXqXjhjHXQFUHtdCDX3A@public.gmane.org> Sender: linux-man-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Peng Haitao Cc: linux-man-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, carlos-v2tUB8YBRSi3e3T8WW9gsA@public.gmane.org, aoliva-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org List-Id: linux-man@vger.kernel.org On 04/25/13 05:49, Peng Haitao wrote: > Before glibc 2.16, fmtmsg() is not thread-safe. > Since glibc 2.16, it is thread-safe, the patch can refer to URL: > http://sourceware.org/git/?p=glibc.git;a=commit;h=7724defcf8873116fe4efab256596861eef21a94 Applied to my local branch for this work. Thank you, Peng. Cheers, Michael > Signed-off-by: Peng Haitao > --- > man3/fmtmsg.3 | 10 ++++++++++ > 1 file changed, 10 insertions(+) > > diff --git a/man3/fmtmsg.3 b/man3/fmtmsg.3 > index f4b3d6f..3e3d3f9 100644 > --- a/man3/fmtmsg.3 > +++ b/man3/fmtmsg.3 > @@ -222,6 +222,16 @@ is the string printed when a message of this class is processed by > .SH VERSIONS > .BR fmtmsg () > is provided in glibc since version 2.1. > +.SH ATTRIBUTES > +.SS Multithreading (see pthreads(7)) > +Before glibc 2.16, the > +.BR fmtmsg () > +uses a static variable that is not protected, so it is not thread-safe. > + > +Since glibc 2.16, the > +.BR fmtmsg () > +uses a lock to protect static variable, so it is thread-safe. > +.\" Modified in commit 7724defcf8873116fe4efab256596861eef21a94 > .SH CONFORMING TO > The functions > .BR fmtmsg () > -- To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html