关于调用mqtt_release出现fail的问题

jiejieTop / mqttclient

A high-performance, high-stability, cross-platform MQTT client, developed based on the socket API, can be used on embedded devices (FreeRTOS / LiteOS / RT-Thread / TencentOS tiny), Linux, Windows, Mac, with a very concise The API interface realizes the quality of service of QOS2 with very few resources, and seamlessly connects the mbedtls encryption library.

Apache License 2.0

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杰神，我在写测试用例的时候需要在最终程序退出时调用mqtt_release来释放已经分配的内存，当我调用这句话的时候，走到了这个分支里：

    /* wait for the clean session to complete */
    while ((CLIENT_STATE_INVALID != mqtt_get_client_state(c))) {
        // platform_timer_usleep(1000);            // 1ms avoid compiler optimization.
        if (platform_timer_is_expired(&timer)) {
            MQTT_LOG_E("%s:%d %s()... mqtt release failed...", __FILE__, __LINE__, __FUNCTION__);
            RETURN_ERROR(MQTT_FAILED_ERROR)
        }    
    }

这也就意味着我的测试用例在之前调用mqtt_lease等接口所申请的内存并没有被释放。我在你提供的example样例里没有看到有关于它的使用方法，这里如果正确使用的话该怎么调用它才能成功呢？

jiejieTop / mqttclient

关于调用mqtt_release出现fail的问题 #58