From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932845Ab3LDPlQ (ORCPT ); Wed, 4 Dec 2013 10:41:16 -0500 Received: from terminus.zytor.com ([198.137.202.10]:58271 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932404Ab3LDPlJ (ORCPT ); Wed, 4 Dec 2013 10:41:09 -0500 Date: Wed, 4 Dec 2013 07:40:32 -0800 From: tip-bot for Jiri Olsa Message-ID: Cc: linux-kernel@vger.kernel.org, acme@redhat.com, hpa@zytor.com, mingo@kernel.org, peterz@infradead.org, efault@gmx.de, namhyung@kernel.org, jolsa@redhat.com, fweisbec@gmail.com, adrian.hunter@intel.com, dsahern@gmail.com, tglx@linutronix.de Reply-To: mingo@kernel.org, hpa@zytor.com, acme@redhat.com, linux-kernel@vger.kernel.org, efault@gmx.de, peterz@infradead.org, namhyung@kernel.org, jolsa@redhat.com, fweisbec@gmail.com, dsahern@gmail.com, adrian.hunter@intel.com, tglx@linutronix.de In-Reply-To: <1385634619-8129-5-git-send-email-jolsa@redhat.com> References: <1385634619-8129-5-git-send-email-jolsa@redhat.com> To: linux-tip-commits@vger.kernel.org Subject: [tip:perf/core] perf tools: Add writen function Git-Commit-ID: bc3a502bc2bc78d03526d6abcc5697aab18d5ae9 X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.1 (terminus.zytor.com [127.0.0.1]); Wed, 04 Dec 2013 07:40:38 -0800 (PST) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: bc3a502bc2bc78d03526d6abcc5697aab18d5ae9 Gitweb: http://git.kernel.org/tip/bc3a502bc2bc78d03526d6abcc5697aab18d5ae9 Author: Jiri Olsa AuthorDate: Thu, 28 Nov 2013 11:30:16 +0100 Committer: Arnaldo Carvalho de Melo CommitDate: Mon, 2 Dec 2013 09:22:46 -0300 perf tools: Add writen function Adding 'writen' function as a synchronous wrapper for write syscall with following prototype: ssize_t writen(int fd, void *buf, size_t n) Returns the number of bytes written on success or -1 in case of err. Signed-off-by: Jiri Olsa Requested-by: Arnaldo Carvalho de Melo Cc: Adrian Hunter Cc: David Ahern Cc: Frederic Weisbecker Cc: Ingo Molnar Cc: Mike Galbraith Cc: Namhyung Kim Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/1385634619-8129-5-git-send-email-jolsa@redhat.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/util.c | 24 +++++++++++++++++++----- tools/perf/util/util.h | 1 + 2 files changed, 20 insertions(+), 5 deletions(-) diff --git a/tools/perf/util/util.c b/tools/perf/util/util.c index 6ea0b4a..b1d5376 100644 --- a/tools/perf/util/util.c +++ b/tools/perf/util/util.c @@ -152,16 +152,14 @@ unsigned long convert_unit(unsigned long value, char *unit) return value; } -/* - * Read exactly 'n' bytes or return an error. - */ -ssize_t readn(int fd, void *buf, size_t n) +static ssize_t ion(bool is_read, int fd, void *buf, size_t n) { void *buf_start = buf; size_t left = n; while (left) { - ssize_t ret = read(fd, buf, left); + ssize_t ret = is_read ? read(fd, buf, left) : + write(fd, buf, left); if (ret <= 0) return ret; @@ -174,6 +172,22 @@ ssize_t readn(int fd, void *buf, size_t n) return n; } +/* + * Read exactly 'n' bytes or return an error. + */ +ssize_t readn(int fd, void *buf, size_t n) +{ + return ion(true, fd, buf, n); +} + +/* + * Write exactly 'n' bytes or return an error. + */ +ssize_t writen(int fd, void *buf, size_t n) +{ + return ion(false, fd, buf, n); +} + size_t hex_width(u64 v) { size_t n = 1; diff --git a/tools/perf/util/util.h b/tools/perf/util/util.h index 9f6b928..ce0f73d 100644 --- a/tools/perf/util/util.h +++ b/tools/perf/util/util.h @@ -254,6 +254,7 @@ int strtailcmp(const char *s1, const char *s2); char *strxfrchar(char *s, char from, char to); unsigned long convert_unit(unsigned long value, char *unit); ssize_t readn(int fd, void *buf, size_t n); +ssize_t writen(int fd, void *buf, size_t n); struct perf_event_attr;