From patchwork Fri May 3 09:11:08 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tzvetomir Stoyanov X-Patchwork-Id: 10928089 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 8D4601398 for ; Fri, 3 May 2019 09:11:36 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7DBE72849D for ; Fri, 3 May 2019 09:11:36 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 71C94284AF; Fri, 3 May 2019 09:11:36 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 027EC2849D for ; Fri, 3 May 2019 09:11:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727044AbfECJLf (ORCPT ); Fri, 3 May 2019 05:11:35 -0400 Received: from mail-wr1-f66.google.com ([209.85.221.66]:42821 "EHLO mail-wr1-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726897AbfECJLf (ORCPT ); Fri, 3 May 2019 05:11:35 -0400 Received: by mail-wr1-f66.google.com with SMTP id l2so6873065wrb.9 for ; Fri, 03 May 2019 02:11:34 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=QQNQCWdAZPE4o870Y5Mw5VQl+CHZWta3q4pQPTGYQSU=; b=nJNRZSt9BBNXtjm9DvA9w2cVUAVbdj9jZjuec9PNTu1JfdfVgusm/qN7HTOVCWGjyQ 1ZN61G29iI0XKF16k9bE2QO8PxMuRMoiI19jDzPeY/B54RpNvTwj3/m6fWQr1eG0P/bz DQf7bOhz7yd8Nnz83uKV8yqTcvOhSDqKt5LyyGzXoxTWj2ZpOEWpIbFSAWvFcgofHPHD 7mFa+D0mv2RTsxRvUfqCr/4f5buGY4gQzhfIbq4rdeUe0O/CuaUAExSPm79w3iBGs1rS ITROzNw0Ko2cTxIwLsGnipZUx1ExsDACuJQ9gcQ5jh2KhU3GrCPBRqSzIcPvars/+F9Y zX5w== X-Gm-Message-State: APjAAAUnU38C4oQXWax8Zj0QnOASZTMbkvOEUa0dadu3rd6DfJDe8L7g joI0yTL1GNxM1UWe8oGXRMk= X-Google-Smtp-Source: APXvYqyLT/yIZhUzaFmfhKBQLktG4vvp5+v02iqoT1bwmGvd1ds4uNSxNZcVt6nAH7LhyL85MHUTTg== X-Received: by 2002:adf:f88c:: with SMTP id u12mr4145159wrp.26.1556874693899; Fri, 03 May 2019 02:11:33 -0700 (PDT) Received: from oberon.eng.vmware.com ([146.247.46.5]) by smtp.gmail.com with ESMTPSA id b11sm2398596wmh.29.2019.05.03.02.11.33 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Fri, 03 May 2019 02:11:33 -0700 (PDT) From: Tzvetomir Stoyanov To: rostedt@goodmis.org Cc: linux-trace-devel@vger.kernel.org Subject: [PATCH v6 15/26] tools/lib/traceevent: Man page for list events APIs Date: Fri, 3 May 2019 12:11:08 +0300 Message-Id: <20190503091119.23399-16-tstoyanov@vmware.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190503091119.23399-1-tstoyanov@vmware.com> References: <20190503091119.23399-1-tstoyanov@vmware.com> MIME-Version: 1.0 Sender: linux-trace-devel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-trace-devel@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Create man page for libtraceevent APIs: tep_list_events() tep_list_events_copy() Signed-off-by: Tzvetomir Stoyanov --- .../libtraceevent-event_list.txt | 122 ++++++++++++++++++ 1 file changed, 122 insertions(+) create mode 100644 tools/lib/traceevent/Documentation/libtraceevent-event_list.txt diff --git a/tools/lib/traceevent/Documentation/libtraceevent-event_list.txt b/tools/lib/traceevent/Documentation/libtraceevent-event_list.txt new file mode 100644 index 000000000000..fba350e5a4cb --- /dev/null +++ b/tools/lib/traceevent/Documentation/libtraceevent-event_list.txt @@ -0,0 +1,122 @@ +libtraceevent(3) +================ + +NAME +---- +tep_list_events, tep_list_events_copy - +Get list of events, sorted by given criteria. + +SYNOPSIS +-------- +[verse] +-- +*#include * + +enum *tep_event_sort_type* { + _TEP_EVENT_SORT_ID_, + _TEP_EVENT_SORT_NAME_, + _TEP_EVENT_SORT_SYSTEM_, +}; + +struct tep_event pass:[*]pass:[*]*tep_list_events*(struct tep_handle pass:[*]_tep_, enum tep_event_sort_type _sort_type_); +struct tep_event pass:[*]pass:[*]*tep_list_events_copy*(struct tep_handle pass:[*]_tep_, enum tep_event_sort_type _sort_type_); +-- + +DESCRIPTION +----------- +The _tep_list_events()_ function returns an array of pointers to the events, +sorted by the _sort_type_ criteria. The last element of the array is NULL. +The returned memory must not be freed, it is managed by the library. +The function is not thread safe. The _tep_ argument is trace event parser +context. The _sort_type_ argument is the required sort criteria: +[verse] +-- + _TEP_EVENT_SORT_ID_ - sort by the event ID. + _TEP_EVENT_SORT_NAME_ - sort by the event (name, system, id) triplet. + _TEP_EVENT_SORT_SYSTEM_ - sort by the event (system, name, id) triplet. +-- + +The _tep_list_events_copy()_ is a thread safe version of _tep_list_events()_. +It has the same behavior, but the returned array is allocated internally and +must be freed by the caller. Note that the content of the array must not be +freed (see the EXAMPLE below). + +RETURN VALUE +------------ +The _tep_list_events()_ function returns an array of pointers to events. +In case of an error, NULL is returned. The returned array must not be freed, +it is managed by the library. + +The _tep_list_events_copy()_ function returns an array of pointers to events. +In case of an error, NULL is returned. The returned array must be freed by +the caller. + +EXAMPLE +------- +[source,c] +-- +#include +... +struct tep_handle *tep = tep_alloc(); +... +int i; +struct tep_event_format **events; + +i=0; +events = tep_list_events(tep, TEP_EVENT_SORT_ID); +if (events == NULL) { + /* Failed to get the events, sorted by ID */ +} else { + while(events[i]) { + /* walk through the list of the events, sorted by ID */ + i++; + } +} + +i=0; +events = tep_list_events_copy(tep, TEP_EVENT_SORT_NAME); +if (events == NULL) { + /* Failed to get the events, sorted by name */ +} else { + while(events[i]) { + /* walk through the list of the events, sorted by name */ + i++; + } + free(events); +} + +... +-- + +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