From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from us-smtp-1.mimecast.com (us-smtp-delivery-1.mimecast.com [205.139.110.120]) by sourceware.org (Postfix) with ESMTP id 9065E393F841 for ; Tue, 19 May 2020 10:45:47 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org 9065E393F841 Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-280-SObwHuY9PRq2ETaOGTfvSQ-1; Tue, 19 May 2020 06:45:45 -0400 X-MC-Unique: SObwHuY9PRq2ETaOGTfvSQ-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id C48FA108BD17; Tue, 19 May 2020 10:45:44 +0000 (UTC) Received: from oldenburg2.str.redhat.com (ovpn-113-18.ams2.redhat.com [10.36.113.18]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 2028E5C1BB; Tue, 19 May 2020 10:45:43 +0000 (UTC) From: Florian Weimer To: libc-alpha@sourceware.org Cc: "Michael Kerrisk \(man-pages\)" Subject: [PATCH 18/19] manual: Add pthread_attr_setsigmask_np, pthread_attr_getsigmask_np In-Reply-To: References: Message-Id: <4a7f25b6063cc41f13253953cf6cce8017c163c8.1589884403.git.fweimer@redhat.com> Date: Tue, 19 May 2020 12:45:42 +0200 User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.3 (gnu/linux) MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain X-Spam-Status: No, score=-14.1 required=5.0 tests=BAYES_00, DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, GIT_PATCH_0, RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H4, RCVD_IN_MSPIKE_WL, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.2 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on server2.sourceware.org X-BeenThere: libc-alpha@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Libc-alpha mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 19 May 2020 10:45:48 -0000 And the PTHREAD_ATTR_NO_SIGMASK_NP constant. --- manual/threads.texi | 47 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) diff --git a/manual/threads.texi b/manual/threads.texi index a425635179..28d7cf2abd 100644 --- a/manual/threads.texi +++ b/manual/threads.texi @@ -625,6 +625,7 @@ the standard. @menu * Default Thread Attributes:: Setting default attributes for threads in a process. +* Initial Thread Signal Mask:: Setting the initial mask of threads. * Waiting with Explicit Clocks:: Functions for waiting with an explicit clock specification. @end menu @@ -671,6 +672,52 @@ The system does not have sufficient memory. @end table @end deftypefun +@node Initial Thread Signal Mask +@subsubsection Controlling the Initial Signal Mask of a New Thread + +@Theglibc{} provides a way to specify the initial signal mask of a +thread created using @code{pthread_create}, passing a thread attribute +object configured for this purpose. + +These functions achieve the same effect as blocking all signals using +@code{pthread_sigmask} before creating the thread, and setting the +desired signal mask from the new thread, but in a more explicit +fashion. + +@deftypefun int pthread_attr_setsigmask_np (pthread_attr_t *@var{attr}, const sigset_t *@var{sigmask}) +@standards{GNU, pthread.h} +@safety{@prelim{}@mtsafe{}@asunsafe{@ascuheap{}}@acunsafe{@acsmem{}}} +Change the initial signal mask specified by @var{attr}. If +@var{sigmask} is not @code{NULL}, the initial signal mask for new +threads created with @var{attr} is set to @code{*@var{sigmask}}. If +@var{sigmask} is @code{NULL}, @var{attr} will no longer specify an +explicit signal mask, so that the initial signal mask of the new +thread is inherited from the parent thread creating the new thread. + +This function returns zero on success, and @code{ENOMEM} on memory +allocation failure. +@end deftypefun + +@deftypefun int pthread_attr_getsigmask_np (const pthread_attr_t *@var{attr}, sigset_t *@var{sigmask}) +@standards{GNU, pthread.h} +@safety{@prelim{}@mtsafe{}@asunsafe{@ascuheap{}}@acunsafe{@acsmem{}}} +Retrieve the initial signal mask stored in @var{attr} and write it ot +@code{*@var{sigmask}}. If the signal mask has not been set, return +the special constant @code{PTHREAD_ATTR_NO_SIGMASK_NP}, otherwise +return zero. + +Obtaining the signal mask only works if it has been previously stored +by @code{pthread_attr_setsigmask_np}. For example, the +@code{pthread_getattr_np} function does not obtain the current signal +mask of the specified thread, and @code{pthread_attr_setsigmask_np} +will subsequently report the signal mask as unset. +@end deftypefun + +@deftypevr Macro int PTHREAD_ATTR_NO_SIGMASK_NP +The special value returned by @code{pthread_attr_setsigmask_np} to +indicate that no signal mask has been set for the attribute. +@end deftypevr + @node Waiting with Explicit Clocks @subsubsection Functions for Waiting According to a Specific Clock -- 2.25.4