C++ (Cpp) createNotificationPipe 예제들

예제 #1

파일: TNonblockingServer.cpp 프로젝트: 7u83/thrift

void TNonblockingIOThread::createNotificationPipe() {
  if(evutil_socketpair(AF_LOCAL, SOCK_STREAM, 0, notificationPipeFDs_) == -1) {
    GlobalOutput.perror("TNonblockingServer::createNotificationPipe ", EVUTIL_SOCKET_ERROR());
    throw TException("can't create notification pipe");
  }
  if(evutil_make_socket_nonblocking(notificationPipeFDs_[0])<0 ||
     evutil_make_socket_nonblocking(notificationPipeFDs_[1])<0) {
    ::THRIFT_CLOSESOCKET(notificationPipeFDs_[0]);
    ::THRIFT_CLOSESOCKET(notificationPipeFDs_[1]);
    throw TException("TNonblockingServer::createNotificationPipe() THRIFT_O_NONBLOCK");
  }
  for (int i = 0; i < 2; ++i) {
#if LIBEVENT_VERSION_NUMBER < 0x02000000
    int flags;
    if ((flags = THRIFT_FCNTL(notificationPipeFDs_[i], F_GETFD, 0)) < 0 ||
        THRIFT_FCNTL(notificationPipeFDs_[i], F_SETFD, flags | FD_CLOEXEC) < 0) {
#else
    if (evutil_make_socket_closeonexec(notificationPipeFDs_[i]) < 0) {
#endif
      ::THRIFT_CLOSESOCKET(notificationPipeFDs_[0]);
      ::THRIFT_CLOSESOCKET(notificationPipeFDs_[1]);
      throw TException("TNonblockingServer::createNotificationPipe() "
        "FD_CLOEXEC");
    }
  }
}

/**
 * Register the core libevent events onto the proper base.
 */
void TNonblockingIOThread::registerEvents() {
  threadId_ = Thread::get_current();

  assert(eventBase_ == 0);
  eventBase_ = getServer()->getUserEventBase();
  if (eventBase_ == NULL) {
    eventBase_ = event_base_new();
    ownEventBase_ = true;
  }

  // Print some libevent stats
  if (number_ == 0) {
    GlobalOutput.printf("TNonblockingServer: using libevent %s method %s",
            event_get_version(),
            event_base_get_method(eventBase_));
  }

  if (listenSocket_ >= 0) {
    // Register the server event
    event_set(&serverEvent_,
              listenSocket_,
              EV_READ | EV_PERSIST,
              TNonblockingIOThread::listenHandler,
              server_);
    event_base_set(eventBase_, &serverEvent_);

    // Add the event and start up the server
    if (-1 == event_add(&serverEvent_, 0)) {
      throw TException("TNonblockingServer::serve(): "
                       "event_add() failed on server listen event");
    }
    GlobalOutput.printf("TNonblocking: IO thread #%d registered for listen.",
                        number_);
  }

  createNotificationPipe();

  // Create an event to be notified when a task finishes
  event_set(&notificationEvent_,
            getNotificationRecvFD(),
            EV_READ | EV_PERSIST,
            TNonblockingIOThread::notifyHandler,
            this);

  // Attach to the base
  event_base_set(eventBase_, &notificationEvent_);

  // Add the event and start up the server
  if (-1 == event_add(&notificationEvent_, 0)) {
    throw TException("TNonblockingServer::serve(): "
                     "event_add() failed on task-done notification event");
  }
  GlobalOutput.printf("TNonblocking: IO thread #%d registered for notify.",
                      number_);
}

예제 #2

파일: TNonblockingServer.cpp 프로젝트: longcongduoi/Thrift_ASIO

void TNonblockingIOThread::createNotificationPipe() {
  if(evutil_socketpair(AF_LOCAL, SOCK_STREAM, 0, notificationPipeFDs_) == -1) {
    GlobalOutput.perror("TNonblockingServer::createNotificationPipe ", EVUTIL_SOCKET_ERROR());
    throw TException("can't create notification pipe");
  }
  if(evutil_make_socket_nonblocking(notificationPipeFDs_[0])<0 ||
     evutil_make_socket_nonblocking(notificationPipeFDs_[1])<0) {
    ::close(notificationPipeFDs_[0]);
    ::close(notificationPipeFDs_[1]);
    throw TException("TNonblockingServer::createNotificationPipe() O_NONBLOCK");
  }
  for (int i = 0; i < 2; ++i) {
#if LIBEVENT_VERSION_NUMBER < 0x02000000
    int flags;
    if ((flags = fcntl(notificationPipeFDs_[i], F_GETFD, 0)) < 0 ||
        fcntl(notificationPipeFDs_[i], F_SETFD, flags | FD_CLOEXEC) < 0) {
#else
    if (evutil_make_socket_closeonexec(notificationPipeFDs_[i]) < 0) {
#endif
      ::close(notificationPipeFDs_[0]);
      ::close(notificationPipeFDs_[1]);
      throw TException("TNonblockingServer::createNotificationPipe() "
        "FD_CLOEXEC");
    }
  }
}

/**
 * Register the core libevent events onto the proper base.
 */
void TNonblockingIOThread::registerEvents() {
  if (listenSocket_ >= 0) {
    // Register the server event
    event_set(&serverEvent_,
              listenSocket_,
              EV_READ | EV_PERSIST,
              TNonblockingIOThread::listenHandler,
              server_);
    event_base_set(eventBase_, &serverEvent_);

    // Add the event and start up the server
    if (-1 == event_add(&serverEvent_, 0)) {
      throw TException("TNonblockingServer::serve(): "
                       "event_add() failed on server listen event");
    }
    GlobalOutput.printf("TNonblocking: IO thread #%d registered for listen.",
                        number_);
  }

  createNotificationPipe();

  // Create an event to be notified when a task finishes
  event_set(&notificationEvent_,
            getNotificationRecvFD(),
            EV_READ | EV_PERSIST,
            TNonblockingIOThread::notifyHandler,
            this);

  // Attach to the base
  event_base_set(eventBase_, &notificationEvent_);

  // Add the event and start up the server
  if (-1 == event_add(&notificationEvent_, 0)) {
    throw TException("TNonblockingServer::serve(): "
                     "event_add() failed on task-done notification event");
  }
  GlobalOutput.printf("TNonblocking: IO thread #%d registered for notify.",
                      number_);
}

bool TNonblockingIOThread::notify(TNonblockingServer::TConnection* conn) {
  int fd = getNotificationSendFD();
  if (fd < 0) {
    return false;
  }

  const int kSize = sizeof(conn);
  if (send(fd, const_cast_sockopt(&conn), kSize, 0) != kSize) {
    return false;
  }

  return true;
}