C++ Duration::ms方法代码示例

    ZooKeeperImpl(ZooKeeper* zk,
                  const string& servers,
                  const Duration& timeout,
                  Watcher* watcher)
        : servers(servers),
          zk(zk),
          watcher(watcher)
    {
        if (watcher == NULL) {
            LOG(FATAL) << "Cannot instantiate ZooKeeper with NULL watcher";
        }

        // Lookup PID of the WatcherProcess associated with the Watcher.
        pid = process::dispatch(manager->self(),
                                &WatcherProcessManager::lookup,
                                watcher).get();

        // N.B. The Watcher and thus WatcherProcess may already be gone,
        // in which case, each dispatch to the WatcherProcess that we do
        // will just get dropped on the floor.

        // TODO(benh): Link with WatcherProcess PID?

        zh = zookeeper_init(
                 servers.c_str(),
                 event,
                 static_cast<int>(timeout.ms()),
                 NULL,
                 this,
                 0);

        if (zh == NULL) {
            PLOG(FATAL) << "Failed to create ZooKeeper, zookeeper_init";
        }
    }

void ZooKeeperTestServer::setMinSessionTimeout(const Duration& min)
{
  // ZooKeeper server uses int representation of milliseconds for
  // session timeouts.
  // See http://zookeeper.apache.org/doc/trunk/zookeeperAdmin.html
  zooKeeperServer->setMinSessionTimeout(static_cast<int>(min.ms()));
}

  ZooKeeperImpl(ZooKeeper* zk,
                const string& servers,
                const Duration& timeout,
                Watcher* watcher)
    : servers(servers),
      zk(zk),
      watcher(watcher)
  {
    if (watcher == NULL) {
      LOG(FATAL) << "Cannot instantiate ZooKeeper with NULL watcher";
    }

    zh = zookeeper_init(
        servers.c_str(),
        event,
        static_cast<int>(timeout.ms()),
        NULL,
        this,
        0);

    if (zh == NULL) {
      PLOG(FATAL) << "Failed to create ZooKeeper, zookeeper_init";
    }
  }

// Suspends execution for the given duration.
// NOTE: This implementation features a millisecond-resolution sleep API, while
// the POSIX version uses a nanosecond-resolution sleep API. As of this writing,
// Mesos only requires millisecond resolution, so this is ok for now.
inline Try<Nothing> sleep(const Duration& duration)
{
  ::Sleep(static_cast<DWORD>(duration.ms()));

  return Nothing();
}

inline std::ostream& operator<<(std::ostream& stream, const Duration& duration_)
{
  // Output the duration in full double precision and save the old precision.
  std::streamsize precision =
    stream.precision(std::numeric_limits<double>::digits10);

  // Parse the duration as the sign and the absolute value.
  Duration duration = duration_;
  if (duration_ < Duration::zero()) {
    stream << "-";

    // Duration::min() may not be representable as a positive Duration.
    if (duration_ == Duration::min()) {
      duration = Duration::max();
    } else {
      duration = duration_ * -1;
    }
  }

  // First determine which bucket of time unit the duration falls into
  // then check whether the duration can be represented as a whole
  // number with this time unit or a smaller one.
  // e.g. 1.42857142857143weeks falls into the 'Weeks' bucket but
  // reads better with a smaller unit: '10days'. So we use 'days'
  // instead of 'weeks' to output the duration.
  int64_t nanoseconds = duration.ns();
  if (duration < Microseconds(1)) {
    stream << duration.ns() << Nanoseconds::units();
  } else if (duration < Milliseconds(1)) {
    if (nanoseconds % Duration::MICROSECONDS != 0) {
      // We can't get a whole number using this unit but we can at
      // one level down.
      stream << duration.ns() << Nanoseconds::units();
    } else {
      stream << duration.us() << Microseconds::units();
    }
  } else if (duration < Seconds(1)) {
    if (nanoseconds % Duration::MILLISECONDS != 0 &&
        nanoseconds % Duration::MICROSECONDS == 0) {
      stream << duration.us() << Microseconds::units();
    } else {
      stream << duration.ms() << Milliseconds::units();
    }
  } else if (duration < Minutes(1)) {
    if (nanoseconds % Duration::SECONDS != 0 &&
        nanoseconds % Duration::MILLISECONDS == 0) {
      stream << duration.ms() << Milliseconds::units();
    } else {
      stream << duration.secs() << Seconds::units();
    }
  } else if (duration < Hours(1)) {
    if (nanoseconds % Duration::MINUTES != 0 &&
        nanoseconds % Duration::SECONDS == 0) {
      stream << duration.secs() << Seconds::units();
    } else {
      stream << duration.mins() << Minutes::units();
    }
  } else if (duration < Days(1)) {
    if (nanoseconds % Duration::HOURS != 0 &&
        nanoseconds % Duration::MINUTES == 0) {
      stream << duration.mins() << Minutes::units();
    } else {
      stream << duration.hrs() << Hours::units();
    }
  } else if (duration < Weeks(1)) {
    if (nanoseconds % Duration::DAYS != 0 &&
        nanoseconds % Duration::HOURS == 0) {
      stream << duration.hrs() << Hours::units();
    } else {
      stream << duration.days() << Days::units();
    }
  } else {
    if (nanoseconds % Duration::WEEKS != 0 &&
        nanoseconds % Duration::DAYS == 0) {
      stream << duration.days() << Days::units();
    } else {
      stream << duration.weeks() << Weeks::units();
    }
  }

  // Return the stream to original formatting state.
  stream.precision(precision);

  return stream;
}

void ZooKeeperTestServer::setMaxSessionTimeout(const Duration& max)
{
  // See the comment for setMinSessionTimeout.
  zooKeeperServer->setMaxSessionTimeout(static_cast<int>(max.ms()));
}