Method load

OpenHD/ohd_common/src/openhd_util_time.cpp:96–99

class ThreadSafeINT64_t {
 public:
  int64_t load() {
    std::lock_guard<std::mutex> lock(m_mutex);
    return value;
  }
  void store(int64_t v) {
    std::lock_guard<std::mutex> lock(m_mutex);
    value = v;