From patchwork Thu Jul 21 12:06:25 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christophe Milard X-Patchwork-Id: 72558 Delivered-To: patch@linaro.org Received: by 10.140.29.52 with SMTP id a49csp384512qga; Thu, 21 Jul 2016 04:21:51 -0700 (PDT) X-Received: by 10.37.211.132 with SMTP id e126mr33132593ybf.74.1469100111235; Thu, 21 Jul 2016 04:21:51 -0700 (PDT) Return-Path: Received: from lists.linaro.org (lists.linaro.org. [54.225.227.206]) by mx.google.com with ESMTP id n83si4640047qkn.201.2016.07.21.04.21.50; Thu, 21 Jul 2016 04:21:51 -0700 (PDT) Received-SPF: pass (google.com: domain of lng-odp-bounces@lists.linaro.org designates 54.225.227.206 as permitted sender) client-ip=54.225.227.206; Authentication-Results: mx.google.com; spf=pass (google.com: domain of lng-odp-bounces@lists.linaro.org designates 54.225.227.206 as permitted sender) smtp.mailfrom=lng-odp-bounces@lists.linaro.org; dmarc=pass (p=NONE dis=NONE) header.from=linaro.org Received: by lists.linaro.org (Postfix, from userid 109) id DECF261E0B; Thu, 21 Jul 2016 11:21:50 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on ip-10-142-244-252 X-Spam-Level: X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_LOW, RCVD_IN_MSPIKE_H3, RCVD_IN_MSPIKE_WL, URIBL_BLOCKED autolearn=disabled version=3.4.0 Received: from [127.0.0.1] (localhost [127.0.0.1]) by lists.linaro.org (Postfix) with ESMTP id 4329D6898B; Thu, 21 Jul 2016 11:09:14 +0000 (UTC) X-Original-To: lng-odp@lists.linaro.org Delivered-To: lng-odp@lists.linaro.org Received: by lists.linaro.org (Postfix, from userid 109) id 49E1468984; Thu, 21 Jul 2016 11:09:04 +0000 (UTC) Received: from mail-lf0-f54.google.com (mail-lf0-f54.google.com [209.85.215.54]) by lists.linaro.org (Postfix) with ESMTPS id 139A6617A1 for ; Thu, 21 Jul 2016 11:07:35 +0000 (UTC) Received: by mail-lf0-f54.google.com with SMTP id l69so58599690lfg.1 for ; Thu, 21 Jul 2016 04:07:35 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=MA3qnwQx9jVx2580PzddDu/4ggFIM7y81ILkGfzLfzw=; b=Zm+BTbQSiOLFs434EneGfBtY8JM22yDRz8kotmh6ZO+S5Ofu1y48GzpRySERcTzePj TSx3WcFIKTLKE1FB2986Z1KsCJjwRh5Qeo5ib0oTU1FVLn3kOKAvPlzSAxBgQGlUbBze Y/oZbjm/yFQklcsz3UAKql/WLkaPyyVC1U6KY4Jpp1OYMJ0FvzxDCpFefmH7IxVs/MMM k1HDmIXmjeEXCMNS+1uVC3eheV/k+oQ314SaZsqJCK0HhN7ZHtAMOVVzXD/n/skOiuMl H0PUUhWs+Ey1qvLjXAXbKP+xIL/rU4E4iBxsZ8X4Zc81CbgOhHO8WkEHAfcrmQokca1C lp0w== X-Gm-Message-State: ALyK8tLFATCmUFPxncrj475U/w4tktJeOOEt67JFJ41DhqJ9ZDMucitfE3xRhKE1Wau0ubo6LO8= X-Received: by 10.25.133.138 with SMTP id h132mr21432510lfd.210.1469099253838; Thu, 21 Jul 2016 04:07:33 -0700 (PDT) Received: from erachmi-ericsson.ki.sw.ericsson.se (c-83-233-90-46.cust.bredband2.com. [83.233.90.46]) by smtp.gmail.com with ESMTPSA id i80sm1577861lfg.6.2016.07.21.04.07.32 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Thu, 21 Jul 2016 04:07:33 -0700 (PDT) From: Christophe Milard To: mike.holmes@linaro.org, lng-odp@lists.linaro.org, balakrishna.garapati@linaro.org Date: Thu, 21 Jul 2016 14:06:25 +0200 Message-Id: <1469102786-65530-18-git-send-email-christophe.milard@linaro.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1469102786-65530-1-git-send-email-christophe.milard@linaro.org> References: <1469102786-65530-1-git-send-email-christophe.milard@linaro.org> X-Topics: patch Subject: [lng-odp] [API-NEXT PATCHv3 17/18] drv: adding spinlock.h X-BeenThere: lng-odp@lists.linaro.org X-Mailman-Version: 2.1.16 Precedence: list List-Id: "The OpenDataPlane \(ODP\) List" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: lng-odp-bounces@lists.linaro.org Sender: "lng-odp" Based on API interface file. Signed-off-by: Christophe Milard --- include/odp/drv/spec/spinlock.h | 86 +++++++++++++++++++++++++++++++++++++++++ platform/Makefile.inc | 1 + 2 files changed, 87 insertions(+) create mode 100644 include/odp/drv/spec/spinlock.h -- 2.7.4 diff --git a/include/odp/drv/spec/spinlock.h b/include/odp/drv/spec/spinlock.h new file mode 100644 index 0000000..52efb56 --- /dev/null +++ b/include/odp/drv/spec/spinlock.h @@ -0,0 +1,86 @@ +/* Copyright (c) 2016, Linaro Limited + * All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +/** + * @file + * + * ODPDRV spinlock + */ + +#ifndef ODPDRV_API_SPINLOCK_H_ +#define ODPDRV_API_SPINLOCK_H_ +#include + +#ifdef __cplusplus +extern "C" { +#endif + +/** + * @addtogroup odpdrv_locks + * @details + * Spin lock (odpdrv_spinlock_t) + * + * Spinlock simply re-tries to acquire the lock as long as takes to succeed. + * Spinlock is not fair since some threads may succeed more often than others. + * @{ + */ + +/** + * @typedef odpdrv_spinlock_t + * ODPDRV spinlock + */ + +/** + * Initialize spin lock. + * + * @param splock Pointer to a spin lock + */ +void odpdrv_spinlock_init(odpdrv_spinlock_t *splock); + +/** + * Acquire spin lock. + * + * @param splock Pointer to a spin lock + */ +void odpdrv_spinlock_lock(odpdrv_spinlock_t *splock); + +/** + * Try to acquire spin lock. + * + * @param splock Pointer to a spin lock + * + * @retval 0 lock not acquired + * @retval !0 lock acquired + */ +int odpdrv_spinlock_trylock(odpdrv_spinlock_t *splock); + +/** + * Release spin lock. + * + * @param splock Pointer to a spin lock + */ +void odpdrv_spinlock_unlock(odpdrv_spinlock_t *splock); + +/** + * Check if spin lock is busy (locked). + * + * @param splock Pointer to a spin lock + * + * @retval 1 lock busy (locked) + * @retval 0 lock not busy. + */ +int odpdrv_spinlock_is_locked(odpdrv_spinlock_t *splock); + +/** + * @} + */ + +#ifdef __cplusplus +} +#endif + +#include +#endif diff --git a/platform/Makefile.inc b/platform/Makefile.inc index 900b023..404c798 100644 --- a/platform/Makefile.inc +++ b/platform/Makefile.inc @@ -67,5 +67,6 @@ odpdrvspecinclude_HEADERS = \ $(top_srcdir)/include/odp/drv/spec/atomic.h \ $(top_srcdir)/include/odp/drv/spec/byteorder.h \ $(top_srcdir)/include/odp/drv/spec/compiler.h \ + $(top_srcdir)/include/odp/drv/spec/spinlock.h \ $(top_srcdir)/include/odp/drv/spec/std_types.h \ $(top_srcdir)/include/odp/drv/spec/sync.h