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diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/components/802_15_4/api/HAL/hal_mutex.h b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/802_15_4/api/HAL/hal_mutex.h
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+/**
+ * Copyright (c) 2016 - 2018 Nordic Semiconductor ASA and Luxoft Global Operations Gmbh.
+ * 
+ * All Rights Reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ * 
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ * 
+ * 2. Redistributions in binary form, except as embedded into a Nordic
+ *    Semiconductor ASA integrated circuit in a product or a software update for
+ *    such product, must reproduce the above copyright notice, this list of
+ *    conditions and the following disclaimer in the documentation and/or other
+ *    materials provided with the distribution.
+ * 
+ * 3. Neither the name of Nordic Semiconductor ASA nor the names of its
+ *    contributors may be used to endorse or promote products derived from this
+ *    software without specific prior written permission.
+ * 
+ * 4. This software, with or without modification, must only be used with a
+ *    Nordic Semiconductor ASA integrated circuit.
+ * 
+ * 5. Any software provided in binary form under this license must not be reverse
+ *    engineered, decompiled, modified and/or disassembled.
+ * 
+ * 
+ * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
+ * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+ * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * 
+ */
+#ifndef HAL_MUTEX_H_INCLUDED
+#define HAL_MUTEX_H_INCLUDED
+
+#include "hal_atomic.h"
+
+/** @file
+ * This is a simple mutex interface to be used in System Memory Manager
+ * to make it thread aware.
+ *
+ * @defgroup hal_mutex HAL Mutex API
+ * @ingroup hal_15_4
+ * @{
+ * @details NRF52 implementation is void and PC implementation is identical to atomic.
+ */
+
+
+#if defined   ( __GNUC__ )
+#include <signal.h>
+typedef volatile sig_atomic_t mutex_t;
+#else
+#include <stdint.h>
+typedef volatile uint32_t     mutex_t;
+#endif
+
+
+/**@brief Configures mutex lock before first usage.
+ *
+ * @param[inout] p_mutex  pointer to mutex variable.
+ */
+void hal_mutex_init(mutex_t * p_mutex);
+
+/**@brief Atomically sets mutex. If set is failed, enters spin lock loop.
+ *
+ * @param[in] p_mutex  pointer to mutex variable.
+ */
+void hal_mutex_lock(mutex_t * p_mutex);
+
+/**
+ * @brief Atomically clears mutex. Every other thread, spinning at this lock may
+ * try to lock it afterwards.
+ *
+ * @param[in] p_mutex  pointer to mutex variable.
+ */
+void hal_mutex_unlock(mutex_t * p_mutex);
+
+/** @} */
+
+#endif /* HAL_MUTEX_H_INCLUDED */