Import Mbed OS hard-float snapshot

targets/TARGET_Maxim/TARGET_MAX32620C/mxc/mxc_lock.h

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+/**
+ * @file
+ * @brief    Exclusive access lock utility functions.
+*/
+/* ****************************************************************************
+ * Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
+ * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Except as contained in this notice, the name of Maxim Integrated
+ * Products, Inc. shall not be used except as stated in the Maxim Integrated
+ * Products, Inc. Branding Policy.
+ *
+ * The mere transfer of this software does not imply any licenses
+ * of trade secrets, proprietary technology, copyrights, patents,
+ * trademarks, maskwork rights, or any other form of intellectual
+ * property whatsoever. Maxim Integrated Products, Inc. retains all
+ * ownership rights.
+ *
+ * $Date: 2017-02-27 14:38:42 -0600 (Mon, 27 Feb 2017) $
+ * $Revision: 26655 $
+ *
+ *************************************************************************** */
+
+/* Define to prevent redundant inclusion */
+#ifndef _MXC_LOCK_H_
+#define _MXC_LOCK_H_
+
+/* **** Includes **** */
+#include "mxc_config.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @ingroup    syscfg
+ * @defgroup   mxc_lock_utilities Exclusive Access Locks
+ * @brief      Lock functions to obtain and release a variable for exclusive
+ *             access. These functions are marked interrupt safe if they are
+ *             interrupt safe.
+ * @{
+ */
+
+/* **** Definitions **** */
+
+/* **** Globals **** */
+
+/* **** Function Prototypes **** */
+
+/**
+ * @brief      Attempts to acquire the lock.
+ * @details    This in an interrupt safe function that can be used as a mutex.
+ *             The lock variable must remain in scope until the lock is
+ *             released. Will not block if another thread has already acquired
+ *             the lock.
+ * @param      lock   Pointer to variable that is used for the lock.
+ * @param      value  Value to be place in the lock. Can not be 0.
+ *
+ * @return     #E_NO_ERROR if everything successful, #E_BUSY if lock is taken.
+ */
+int mxc_get_lock(uint32_t *lock, uint32_t value);
+
+/**
+ * @brief         Free the given lock.
+ * @param[in,out] lock  Pointer to the variable used for the lock. When the lock
+ *                      is free, the value pointed to by @p lock is set to zero.
+ */
+void mxc_free_lock(uint32_t *lock);
+
+/**@} end of group mxc_lock_utilities */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _MXC_LOCK_H_ */