extern "C" fn wrap_sensor_listener(
    sensor:        sensor_ptr,
    arg:           sensor_arg,
    sensor_data:   sensor_data_ptr,
    sensor_type:   sensor_type_t
) -> i32 {
    //  Use `arg` to fetch the `sensor_listener_info`
    let arg = arg as usize;
    assert!(arg < MAX_SENSOR_LISTENERS, "bad sensor arg");
    let info = unsafe { SENSOR_LISTENERS[arg] };
    assert!(!info.sensor_key.is_empty(), "missing sensor key");

    //  Check that the sensor data is valid
    if sensor_data.is_null() { return SYS_EINVAL }  //  Exit if data is missing
    assert!(!sensor.is_null(), "null sensor");

    //  Convert the sensor data to sensor value
    let sensor_value = convert_sensor_data(sensor_data, info.sensor_key, sensor_type);
    if let SensorValueType::None = sensor_value.value { 
        return SYS_EINVAL;   //  Exit if sensor is not ready
    }

    //  Call the unwrapped listener function to hande the sensor value
    let res = (info.listener_func)(&sensor_value);

    //  Check the result returned by the unwrapped listener function
    if let Err(_err) = res {
        SYS_EINVAL  //  Return error to Mynewt
    } else {
        0           //  Return 0 to Mynewt to indicate no error
    }
}
///  Wrapped Sensor Listener that converts Mynewt `sensor_data` into our `sensor_value` format and calls the application's Listener Function
Wrapped Sensor Listener that converts Mynewt `sensor_data` into our `sensor_value` format and calls the application's Listener Function
Wrapped Sensor Listener that converts Mynewt ` sensor_data ` into our ` sensor_value ` format and calls the application ' s Listener Function
extern "C" fn wrap_sensor_listener(
    sensor:        sensor_ptr,
    arg:           sensor_arg,
    sensor_data:   sensor_data_ptr,
    sensor_type:   sensor_type_t
) -> i32 {
    //  Use `arg` to fetch the `sensor_listener_info`
    let arg = arg as usize;
    assert!(arg < MAX_SENSOR_LISTENERS, "bad sensor arg");
    let info = unsafe { SENSOR_LISTENERS[arg] };
    assert!(!info.sensor_key.is_empty(), "missing sensor key");
    //  Check that the sensor data is valid
    if sensor_data.is_null() { return SYS_EINVAL }  //  Exit if data is missing
    assert!(!sensor.is_null(), "null sensor");
    //  Convert the sensor data to sensor value
    let sensor_value = convert_sensor_data(sensor_data, info.sensor_key, sensor_type);
    if let SensorValueType::None = sensor_value.value { 
        return SYS_EINVAL;   //  Exit if sensor is not ready
    }
    //  Call the unwrapped listener function to hande the sensor value
    let res = (info.listener_func)(&sensor_value);
    //  Check the result returned by the unwrapped listener function
    if let Err(_err) = res {
        SYS_EINVAL  //  Return error to Mynewt
    } else {
        0           //  Return 0 to Mynewt to indicate no error
    }
}
extern " " fn wrap_sensor_listener ( sensor : sensor_ptr , arg : sensor_arg , sensor_data : sensor_data_ptr , sensor_type : sensor_type_t ) -> i32 { //  Use `arg` to fetch the `sensor_listener_info` let arg = arg as usize ; assert ! ( arg MAX_SENSOR_LISTENERS " " ) ; let info = unsafe { SENSOR_LISTENERS [ arg ] } ; assert ! ( info sensor_key is_empty ( ) " " ) ; //  Check that the sensor data is valid if sensor_data . is_null ( ) { return SYS_EINVAL } //  Exit if data is missing assert ! ( sensor is_null ( ) " " ) ; //  Convert the sensor data to sensor value let sensor_value = convert_sensor_data ( sensor_data , info . sensor_key , sensor_type ) ; if let SensorValueType :: None = sensor_value . value { return SYS_EINVAL ; //  Exit if sensor is not ready } //  Call the unwrapped listener function to hande the sensor value let res = ( info . listener_func ) ( & sensor_value ) ; //  Check the result returned by the unwrapped listener function if let Err ( _err ) = res { SYS_EINVAL //  Return error to Mynewt } else { 0 //  Return 0 to Mynewt to indicate no error } }
Wrapped Sensor Listener that converts Mynewt `sensor_data` into our `sensor_value` format and calls the application's Listener Function
Wrapped Sensor Listener that converts Mynewt ` sensor_data ` into our ` sensor_value ` format and calls the application ' s Listener Function
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