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[83.233.90.46]) by smtp.gmail.com with ESMTPSA id y200sm2226229lfd.12.2016.07.18.09.50.54 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 18 Jul 2016 09:50:55 -0700 (PDT) From: Christophe Milard To: mike.holmes@linaro.org, yi.he@linaro.org, balakrishna.garapati@linaro.org, lng-odp@lists.linaro.org Date: Mon, 18 Jul 2016 19:49:37 +0200 Message-Id: <1468864178-43721-18-git-send-email-christophe.milard@linaro.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1468864178-43721-1-git-send-email-christophe.milard@linaro.org> References: <1468864178-43721-1-git-send-email-christophe.milard@linaro.org> X-Topics: patch Subject: [lng-odp] [API-NEXT PATCH 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" duplicated from the API side (hash: 77a27212b563299959fb2a609b86bb9117a8f918.) 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