From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752914AbbDXBUg (ORCPT ); Thu, 23 Apr 2015 21:20:36 -0400 Received: from lgeamrelo02.lge.com ([156.147.1.126]:52925 "EHLO lgeamrelo02.lge.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752254AbbDXBUc (ORCPT ); Thu, 23 Apr 2015 21:20:32 -0400 X-Original-SENDERIP: 10.177.220.203 X-Original-MAILFROM: namhyung@kernel.org From: Namhyung Kim To: Arnaldo Carvalho de Melo Cc: Ingo Molnar , Peter Zijlstra , Jiri Olsa , LKML , David Ahern Subject: [PATCH v2 9/10] perf tools: Introduce pstack_peek() Date: Fri, 24 Apr 2015 10:15:32 +0900 Message-Id: <1429838133-14001-1-git-send-email-namhyung@kernel.org> X-Mailer: git-send-email 2.3.4 In-Reply-To: <20150423223058.GJ7881@kernel.org> References: <20150423223058.GJ7881@kernel.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The pstack_peek() is to get the topmost entry without removing it. Signed-off-by: Namhyung Kim --- I also pushed to perf/tui-cleanup-v4. tools/perf/util/pstack.c | 7 +++++++ tools/perf/util/pstack.h | 1 + 2 files changed, 8 insertions(+) diff --git a/tools/perf/util/pstack.c b/tools/perf/util/pstack.c index a126e6cc6e73..b234a6e3d0d4 100644 --- a/tools/perf/util/pstack.c +++ b/tools/perf/util/pstack.c @@ -74,3 +74,10 @@ void *pstack__pop(struct pstack *pstack) pstack->entries[pstack->top] = NULL; return ret; } + +void *pstack__peek(struct pstack *pstack) +{ + if (pstack->top == 0) + return NULL; + return pstack->entries[pstack->top - 1]; +} diff --git a/tools/perf/util/pstack.h b/tools/perf/util/pstack.h index c3cb6584d527..ded7f2e36624 100644 --- a/tools/perf/util/pstack.h +++ b/tools/perf/util/pstack.h @@ -10,5 +10,6 @@ bool pstack__empty(const struct pstack *pstack); void pstack__remove(struct pstack *pstack, void *key); void pstack__push(struct pstack *pstack, void *key); void *pstack__pop(struct pstack *pstack); +void *pstack__peek(struct pstack *pstack); #endif /* _PERF_PSTACK_ */ -- 2.3.4