96 lines
2.3 KiB
C
96 lines
2.3 KiB
C
/*
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* Copyright (c) 2018 Nordic Semiconductor ASA
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/** @file mqtt_os.h
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*
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* @brief MQTT Client depends on certain OS specific functionality. The needed
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* methods are mapped here and should be implemented based on OS in use.
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*
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* @details Memory management, mutex, logging and wall clock are the needed
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* functionality for MQTT module. The needed interfaces are defined
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* in the OS. OS specific port of the interface shall be provided.
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*
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*/
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#ifndef MQTT_OS_H_
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#define MQTT_OS_H_
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#include <stddef.h>
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#include <zephyr/kernel.h>
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#include <zephyr/sys/mutex.h>
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#include <zephyr/net/net_core.h>
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#include "mqtt_internal.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**@brief Initialize the mutex for the module, if any.
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*
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* @details This method is called during module initialization @ref mqtt_init.
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*/
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static inline void mqtt_mutex_init(struct mqtt_client *client)
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{
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sys_mutex_init(&client->internal.mutex);
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}
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/**@brief Acquire lock on the module specific mutex, if any.
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*
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* @details This is assumed to be a blocking method until the acquisition
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* of the mutex succeeds.
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*/
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static inline void mqtt_mutex_lock(struct mqtt_client *client)
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{
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int ret = sys_mutex_lock(&client->internal.mutex, K_FOREVER);
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__ASSERT(ret == 0, "sys_mutex_lock failed with %d", ret);
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(void)ret;
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}
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/**@brief Release the lock on the module specific mutex, if any.
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*/
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static inline void mqtt_mutex_unlock(struct mqtt_client *client)
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{
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int ret = sys_mutex_unlock(&client->internal.mutex);
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__ASSERT(ret == 0, "sys_mutex_unlock failed with %d", ret);
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(void)ret;
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}
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/**@brief Method to get the sys tick or a wall clock in millisecond resolution.
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*
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* @retval Current wall clock or sys tick value in milliseconds.
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*/
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static inline uint32_t mqtt_sys_tick_in_ms_get(void)
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{
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return k_uptime_get_32();
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}
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/**@brief Method to get elapsed time in milliseconds since the last activity.
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*
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* @param[in] last_activity The value since elapsed time is requested.
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*
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* @retval Time elapsed since last_activity time.
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*/
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static inline uint32_t mqtt_elapsed_time_in_ms_get(uint32_t last_activity)
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{
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int32_t diff = k_uptime_get_32() - last_activity;
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if (diff < 0) {
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return 0;
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}
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return diff;
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}
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#ifdef __cplusplus
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}
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#endif
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#endif /* MQTT_OS_H_ */
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