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diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/components/ble/peer_manager/pm_mutex.h b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/ble/peer_manager/pm_mutex.h
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+/**
+ * Copyright (c) 2015 - 2018, Nordic Semiconductor ASA
+ * 
+ * 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 MUTEX_H__
+#define MUTEX_H__
+
+
+#include <stdint.h>
+#include <stdbool.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @cond NO_DOXYGEN
+ * @defgroup pm_mutex Mutex
+ * @ingroup peer_manager
+ * @{
+ * @brief An internal module of @ref peer_manager. This module provides thread-safe mutexes.
+ */
+
+
+/**@brief Defines the storage size of a specified mutex group.
+ *
+ * @param number_of_mutexes the number of mutexes in the group.
+ */
+#define MUTEX_STORAGE_SIZE(number_of_mutexes) ((7 + (number_of_mutexes)) >> 3)
+
+
+/**@brief Initializes a mutex group.
+ *
+ * @param[in] p_mutex     Pointer to the mutex group. See @ref MUTEX_STORAGE_SIZE().
+ * @param[in] mutex_size  The size of the mutex group in number of mutexes.
+ */
+void pm_mutex_init(uint8_t * p_mutex, uint16_t mutex_size);
+
+
+/**@brief Locks the mutex specified by the bit id.
+ *
+ * @param[inout] p_mutex       Pointer to the mutex group.
+ * @param[in]    mutex_bit_id  The bit id of the mutex.
+ *
+ * @retval true   if it was possible to lock the mutex.
+ * @retval false  otherwise.
+ */
+bool pm_mutex_lock(uint8_t * p_mutex, uint16_t mutex_bit_id);
+
+
+/**@brief Locks the first unlocked mutex within the mutex group.
+ *
+ * @param[in, out] p_mutex     Pointer to the mutex group.
+ * @param[in]      mutex_size  The size of the mutex group.
+ *
+ * @return The first unlocked mutex id in the group.
+ * @retval group-size  if there was no unlocked mutex available.
+ */
+uint16_t pm_mutex_lock_first_available(uint8_t * p_mutex, uint16_t mutex_size);
+
+
+/**@brief Unlocks the mutex specified by the bit id.
+ *
+ * @param[in, out] p_mutex       Pointer to the mutex group.
+ * @param[in]      mutex_bit_id  The bit id of the mutex.
+ */
+void pm_mutex_unlock(uint8_t * p_mutex, uint16_t mutex_bit_id);
+
+
+/**@brief Gets the locking status of the specified mutex.
+ *
+ * @param[in, out] p_mutex      Pointer to the mutex group.
+ * @param[in]      mutex_bit_id The bit id of the mutex.
+ *
+ * @retval true   if the mutex was locked.
+ * @retval false  otherwise.
+ */
+bool pm_mutex_lock_status_get(uint8_t * p_mutex, uint16_t mutex_bit_id);
+
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // MUTEX_H__
+
+/** @}
+ * @endcond
+ */