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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 26D65C11F6B for ; Mon, 12 Jul 2021 07:09:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0F1D56101D for ; Mon, 12 Jul 2021 07:09:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244694AbhGLHLF (ORCPT ); Mon, 12 Jul 2021 03:11:05 -0400 Received: from mga18.intel.com ([134.134.136.126]:45867 "EHLO mga18.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238920AbhGLGtV (ORCPT ); Mon, 12 Jul 2021 02:49:21 -0400 X-IronPort-AV: E=McAfee;i="6200,9189,10042"; a="197204337" X-IronPort-AV: E=Sophos;i="5.84,232,1620716400"; d="scan'208";a="197204337" Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Jul 2021 23:46:33 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.84,232,1620716400"; d="scan'208";a="491916107" Received: from nntpat99-84.inn.intel.com ([10.125.99.84]) by FMSMGA003.fm.intel.com with ESMTP; 11 Jul 2021 23:46:31 -0700 From: Alexey Bayduraev To: Arnaldo Carvalho de Melo Cc: Jiri Olsa , Namhyung Kim , Alexander Shishkin , Peter Zijlstra , Ingo Molnar , linux-kernel , Andi Kleen , Adrian Hunter , Alexander Antonov , Alexei Budankov , Riccardo Mancini Subject: [PATCH v10 02/24] tools lib: Introduce fdarray duplicate function Date: Mon, 12 Jul 2021 09:46:02 +0300 Message-Id: <53c92dce8b1af4863674f57ad7e732d7108e48e1.1626072008.git.alexey.v.bayduraev@linux.intel.com> X-Mailer: git-send-email 2.19.0 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Introduce a function to duplicate an existing file descriptor in the fdarray structure. The function returns the position of the duplicated file descriptor. Acked-by: Namhyung Kim Signed-off-by: Alexey Bayduraev --- tools/lib/api/fd/array.c | 17 +++++++++++++++++ tools/lib/api/fd/array.h | 1 + 2 files changed, 18 insertions(+) diff --git a/tools/lib/api/fd/array.c b/tools/lib/api/fd/array.c index 5e6cb9debe37..f0f195207fca 100644 --- a/tools/lib/api/fd/array.c +++ b/tools/lib/api/fd/array.c @@ -88,6 +88,23 @@ int fdarray__add(struct fdarray *fda, int fd, short revents, enum fdarray_flags return pos; } +int fdarray__dup_entry_from(struct fdarray *fda, int pos, struct fdarray *from) +{ + struct pollfd *entry; + int npos; + + if (pos >= from->nr) + return -EINVAL; + + entry = &from->entries[pos]; + + npos = fdarray__add(fda, entry->fd, entry->events, from->priv[pos].flags); + if (npos >= 0) + fda->priv[npos] = from->priv[pos]; + + return npos; +} + int fdarray__filter(struct fdarray *fda, short revents, void (*entry_destructor)(struct fdarray *fda, int fd, void *arg), void *arg) diff --git a/tools/lib/api/fd/array.h b/tools/lib/api/fd/array.h index 7fcf21a33c0c..60ad197c8ee9 100644 --- a/tools/lib/api/fd/array.h +++ b/tools/lib/api/fd/array.h @@ -42,6 +42,7 @@ struct fdarray *fdarray__new(int nr_alloc, int nr_autogrow); void fdarray__delete(struct fdarray *fda); int fdarray__add(struct fdarray *fda, int fd, short revents, enum fdarray_flags flags); +int fdarray__dup_entry_from(struct fdarray *fda, int pos, struct fdarray *from); int fdarray__poll(struct fdarray *fda, int timeout); int fdarray__filter(struct fdarray *fda, short revents, void (*entry_destructor)(struct fdarray *fda, int fd, void *arg), -- 2.19.0