Function SDL_SensorUpdate

deps/SDL2/src/sensor/SDL_sensor.c:502–549

}

void
SDL_SensorUpdate(void)
{
    int i;
    SDL_Sensor *sensor, *next;

    if (!SDL_WasInit(SDL_INIT_SENSOR)) {
        return;
    }

    SDL_LockSensors();

    if (SDL_updating_sensor) {
        /* The sensors are already being updated */
        SDL_UnlockSensors();
        return;
    }

    SDL_updating_sensor = SDL_TRUE;

    /* Make sure the list is unlocked while dispatching events to prevent application deadlocks */
    SDL_UnlockSensors();

    for (sensor = SDL_sensors; sensor; sensor = sensor->next) {
        sensor->driver->Update(sensor);
    }

    SDL_LockSensors();

    SDL_updating_sensor = SDL_FALSE;

    /* If any sensors were closed while updating, free them here */
    for (sensor = SDL_sensors; sensor; sensor = next) {
        next = sensor->next;
        if (sensor->ref_count <= 0) {
            SDL_SensorClose(sensor);
        }
    }

    /* this needs to happen AFTER walking the sensor list above, so that any
       dangling hardware data from removed devices can be free'd
     */
    for (i = 0; i < SDL_arraysize(SDL_sensor_drivers); ++i) {
        SDL_sensor_drivers[i]->Detect();
    }

    SDL_UnlockSensors();
}

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