From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932258AbaAGDBa (ORCPT ); Mon, 6 Jan 2014 22:01:30 -0500 Received: from LGEMRELSE6Q.lge.com ([156.147.1.121]:42663 "EHLO LGEMRELSE6Q.lge.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756612AbaAGDAR (ORCPT ); Mon, 6 Jan 2014 22:00:17 -0500 X-AuditID: 9c930179-b7c89ae000006438-b7-52cb6dbd06f6 From: Namhyung Kim To: Steven Rostedt , Arnaldo Carvalho de Melo Cc: Frederic Weisbecker , Peter Zijlstra , Ingo Molnar , Namhyung Kim , LKML , Jiri Olsa Subject: [PATCH 1/5] tools lib traceevent: Add WARN and WARN_ONCE macros Date: Tue, 7 Jan 2014 12:00:08 +0900 Message-Id: <1389063612-18173-2-git-send-email-namhyung@kernel.org> X-Mailer: git-send-email 1.7.11.7 In-Reply-To: <1389063612-18173-1-git-send-email-namhyung@kernel.org> References: <1389063612-18173-1-git-send-email-namhyung@kernel.org> X-Brightmail-Tracker: AAAAAA== Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org They're copied from the perf code and will be used to print error message during trace_seq_printf() and friends. Suggested-by: Jiri Olsa Signed-off-by: Namhyung Kim --- tools/lib/traceevent/event-utils.h | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/tools/lib/traceevent/event-utils.h b/tools/lib/traceevent/event-utils.h index e76c9acb92cd..5dc0aec5ab50 100644 --- a/tools/lib/traceevent/event-utils.h +++ b/tools/lib/traceevent/event-utils.h @@ -38,6 +38,28 @@ void __vdie(const char *fmt, ...); void __vwarning(const char *fmt, ...); void __vpr_stat(const char *fmt, ...); +#define likely(x) __builtin_expect(!!(x), 1) +#define unlikely(x) __builtin_expect(!!(x), 0) + +#define __WARN_printf(arg...) do { fprintf(stderr, arg); } while (0) + +#define WARN(condition, format...) ({ \ + int __ret_warn_on = !!(condition); \ + if (unlikely(__ret_warn_on)) \ + __WARN_printf(format); \ + unlikely(__ret_warn_on); \ +}) + +#define WARN_ONCE(condition, format...) ({ \ + static int __warned; \ + int __ret_warn_once = !!(condition); \ + \ + if (unlikely(__ret_warn_once)) \ + if (WARN(!__warned, format)) \ + __warned = 1; \ + unlikely(__ret_warn_once); \ +}) + #define min(x, y) ({ \ typeof(x) _min1 = (x); \ typeof(y) _min2 = (y); \ -- 1.7.11.7