From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-11.9 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SIGNED_OFF_BY,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BE01FC04AB3 for ; Fri, 10 May 2019 20:01:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 988FA21855 for ; Fri, 10 May 2019 20:01:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727953AbfEJUBK (ORCPT ); Fri, 10 May 2019 16:01:10 -0400 Received: from mail.kernel.org ([198.145.29.99]:55102 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727780AbfEJUBK (ORCPT ); Fri, 10 May 2019 16:01:10 -0400 Received: from gandalf.local.home (cpe-66-24-58-225.stny.res.rr.com [66.24.58.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 2A4AE218AD; Fri, 10 May 2019 20:01:08 +0000 (UTC) Received: from rostedt by gandalf.local.home with local (Exim 4.92) (envelope-from ) id 1hPBhb-0006hS-5a; Fri, 10 May 2019 16:01:07 -0400 Message-Id: <20190510200107.063709363@goodmis.org> User-Agent: quilt/0.65 Date: Fri, 10 May 2019 15:56:14 -0400 From: Steven Rostedt To: linux-kernel@vger.kernel.org, linux-trace-devel@vger.kernel.org Cc: Arnaldo Carvalho de Melo , Ingo Molnar , Jiri Olsa , Namhyung Kim , Andrew Morton , Tzvetomir Stoyanov Subject: [PATCH 08/27] tools/lib/traceevent: Man page for host endian APIs References: <20190510195606.537643615@goodmis.org> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15 Sender: linux-trace-devel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-trace-devel@vger.kernel.org From: Tzvetomir Stoyanov Create man pages for libtraceevent APIs: tep_is_bigendian(), tep_is_local_bigendian(), tep_set_local_bigendian() Link: http://lore.kernel.org/linux-trace-devel/20190503091119.23399-8-tstoyanov@vmware.com Signed-off-by: Tzvetomir Stoyanov Signed-off-by: Steven Rostedt (VMware) --- .../libtraceevent-host_endian.txt | 104 ++++++++++++++++++ 1 file changed, 104 insertions(+) create mode 100644 tools/lib/traceevent/Documentation/libtraceevent-host_endian.txt diff --git a/tools/lib/traceevent/Documentation/libtraceevent-host_endian.txt b/tools/lib/traceevent/Documentation/libtraceevent-host_endian.txt new file mode 100644 index 000000000000..d5d375eb8d1e --- /dev/null +++ b/tools/lib/traceevent/Documentation/libtraceevent-host_endian.txt @@ -0,0 +1,104 @@ +libtraceevent(3) +================ + +NAME +---- +tep_is_bigendian, tep_is_local_bigendian, tep_set_local_bigendian - Get / set +the endianness of the local machine. + +SYNOPSIS +-------- +[verse] +-- +*#include * + +enum *tep_endian* { + TEP_LITTLE_ENDIAN = 0, + TEP_BIG_ENDIAN +}; + +int *tep_is_bigendian*(void); +bool *tep_is_local_bigendian*(struct tep_handle pass:[*]_tep_); +void *tep_set_local_bigendian*(struct tep_handle pass:[*]_tep_, enum tep_endian _endian_); +-- + +DESCRIPTION +----------- + +The _tep_is_bigendian()_ gets the endianness of the machine, executing +the function. + +The _tep_is_local_bigendian()_ function gets the endianness of the local +machine, saved in the _tep_ handler. The _tep_ argument is the trace event +parser context. This API is a bit faster than _tep_is_bigendian()_, as it +returns cached endianness of the local machine instead of checking it each time. + +The _tep_set_local_bigendian()_ function sets the endianness of the local +machine in the _tep_ handler. The _tep_ argument is trace event parser context. +The _endian_ argument is the endianness: +[verse] +-- + _TEP_LITTLE_ENDIAN_ - the machine is little endian, + _TEP_BIG_ENDIAN_ - the machine is big endian. +-- + +RETURN VALUE +------------ +The _tep_is_bigendian()_ function returns non zero if the endianness of the +machine, executing the code, is big endian and zero otherwise. + +The _tep_is_local_bigendian()_ function returns true, if the endianness of the +local machine, saved in the _tep_ handler, is big endian, or false otherwise. + +EXAMPLE +------- +[source,c] +-- +#include +... +struct tep_handle *tep = tep_alloc(); +... + if (tep_is_bigendian()) + tep_set_local_bigendian(tep, TEP_BIG_ENDIAN); + else + tep_set_local_bigendian(tep, TEP_LITTLE_ENDIAN); +... + if (tep_is_local_bigendian(tep)) + printf("This machine you are running on is bigendian\n"); + else + printf("This machine you are running on is little endian\n"); + +-- + +FILES +----- +[verse] +-- +*event-parse.h* + Header file to include in order to have access to the library APIs. +*-ltraceevent* + Linker switch to add when building a program that uses the library. +-- + +SEE ALSO +-------- +_libtraceevent(3)_, _trace-cmd(1)_ + +AUTHOR +------ +[verse] +-- +*Steven Rostedt* , author of *libtraceevent*. +*Tzvetomir Stoyanov* , author of this man page. +-- +REPORTING BUGS +-------------- +Report bugs to + +LICENSE +------- +libtraceevent is Free Software licensed under the GNU LGPL 2.1 + +RESOURCES +--------- +https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git -- 2.20.1