Method usedMemory

src/flightRecorder.cpp:1325–1333

}

size_t FlightRecorder::usedMemory() {
    size_t bytes = 0;
    if (_rec != NULL) {
        _rec_lock.lock();
        bytes = _rec->usedMemory();
        _rec_lock.unlock();
    }
    return bytes;
}

bool FlightRecorder::timerTick(u64 wall_time, u32 gc_id) {
    if (!_rec_lock.tryLockShared()) {