C++ port_create函数代码示例

Window::Window(long left, long top, long right, long bottom)
	:	fShowLevel(0),
		fCanvasList(0)
{
 	int windowServerPort;
 	windowServerPort = namer_find ("window_server", 0);
 	if (windowServerPort <= 0) {
 		printf("couldn't connect to window server\n");
 		return;
 	}

	int localReplyPort = port_create(0, "client_syncport");
	fEventPort = port_create(0, "client_eventport");

 	fConnection = new Connection(windowServerPort, localReplyPort);
 	fConnection->WriteInt8(OP_CREATE_WINDOW);
 	fConnection->WriteInt32(0);			// Child of root window
 	fConnection->WriteInt32(left);
 	fConnection->WriteInt32(top);
 	fConnection->WriteInt32(right);
 	fConnection->WriteInt32(bottom);
 	fConnection->WriteInt32(fEventPort);
 	fConnection->Flush();
 	fID = fConnection->ReadInt32();

 	fLock = qsem_create(1);

	thr_create((void*) EventLoop, this, "win_thread");
}

static void*
evport_init(struct event_base *base)
{
	struct evport_data *evpd;

	if (!(evpd = mm_calloc(1, sizeof(struct evport_data))))
		return (NULL);

	if ((evpd->ed_port = port_create()) == -1) {
		mm_free(evpd);
		return (NULL);
	}

	if (grow(evpd, INITIAL_EVENTS_PER_GETN) < 0) {
		close(evpd->ed_port);
		mm_free(evpd);
		return NULL;
	}
		
	evpd->ed_npending = 0;

	evsig_init_(base);

	return (evpd);
}

void SelEpolKqEvPrt::initialize(SOCKET sockfd, const int& timeout)
{
	this->timeoutMilis = timeout;
	this->sockfd = sockfd;
	if(sockfd<=0)
	{
		listenerMode = false;
		sockfd = 0;
	}
	else
	{
		listenerMode = true;
	}
	curfds = 1;
	#if defined(USE_WIN_IOCP)
		initIOCP();
	#elif defined(USE_MINGW_SELECT)
		fdMax = sockfd;
		FD_ZERO(&readfds);
		FD_ZERO(&master);
	#elif defined(USE_SELECT)
		fdsetSize = MAXDESCRIPTORS/FD_SETSIZE;
		fdMax = sockfd;
		for (int var = 0; var < fdsetSize; ++var) {
			FD_ZERO(&readfds[var]);
			FD_ZERO(&master[var]);
		}
	#elif defined USE_EPOLL
		epoll_handle = epoll_create(MAXDESCRIPTORS);
		memset(&ev, 0, sizeof(ev));
	#elif defined USE_KQUEUE
		kq = kqueue();
		if (kq == -1)
		{
			perror("kqueue");
		}
	#elif defined USE_DEVPOLL
		if((dev_poll_fd = open("/dev/poll", O_RDWR)) <0)
		{
			perror("devpoll");
		}
		if (fcntl(dev_poll_fd, F_SETFD, FD_CLOEXEC) < 0)
		{
			perror("devpoll fcntl");
		}
	#elif defined USE_EVPORT
		if ((port = port_create()) < 0) {
			perror("port_create");
		}
	#elif defined USE_POLL
		nfds=1;
		polled_fds = (struct pollfd *)calloc(1, nfds*sizeof(struct pollfd));
		polled_fds->fd = descriptor;
		polled_fds->events = POLLIN | POLLPRI;
		return;
	#endif
	#if !defined(USE_WIN_IOCP)
		if(sockfd>0)registerForEvent(sockfd);
	#endif
}

RTDECL(int) RTFileAioCtxCreate(PRTFILEAIOCTX phAioCtx, uint32_t cAioReqsMax,
                               uint32_t fFlags)
{
    int rc = VINF_SUCCESS;
    PRTFILEAIOCTXINTERNAL pCtxInt;
    AssertPtrReturn(phAioCtx, VERR_INVALID_POINTER);
    AssertReturn(!(fFlags & ~RTFILEAIOCTX_FLAGS_VALID_MASK), VERR_INVALID_PARAMETER);

    pCtxInt = (PRTFILEAIOCTXINTERNAL)RTMemAllocZ(sizeof(RTFILEAIOCTXINTERNAL));
    if (RT_UNLIKELY(!pCtxInt))
        return VERR_NO_MEMORY;

    /* Init the event handle. */
    pCtxInt->iPort = port_create();
    if (RT_LIKELY(pCtxInt->iPort > 0))
    {
        pCtxInt->fFlags   = fFlags;
        pCtxInt->u32Magic = RTFILEAIOCTX_MAGIC;
        *phAioCtx = (RTFILEAIOCTX)pCtxInt;
    }
    else
    {
        RTMemFree(pCtxInt);
        rc = RTErrConvertFromErrno(errno);
    }

    return rc;
}

static int init_evports_per_thread()
{
	int fd;

	evports_evlist_max = global.tune.maxpollevents;
	evports_evlist = calloc(evports_evlist_max, sizeof (port_event_t));
	if (evports_evlist == NULL) {
		goto fail_alloc;
	}

	if (MAX_THREADS > 1 && tid) {
		if ((evports_fd[tid] = port_create()) == -1) {
			goto fail_fd;
		}
	}

	/* we may have to unregister some events initially registered on the
	 * original fd when it was alone, and/or to register events on the new
	 * fd for this thread. Let's just mark them as updated, the poller will
	 * do the rest.
	 */
	for (fd = 0; fd < global.maxsock; fd++)
		updt_fd_polling(fd);

	return 1;

 fail_fd:
	free(evports_evlist);
	evports_evlist = NULL;
	evports_evlist_max = 0;
 fail_alloc:
	return 0;
}

int uv_fs_event_init(uv_loop_t* loop,
                     uv_fs_event_t* handle,
                     const char* filename,
                     uv_fs_event_cb cb,
                     int flags) {
  int portfd;

  loop->counters.fs_event_init++;

  /* We don't support any flags yet. */
  assert(!flags);

  if ((portfd = port_create()) == -1) {
    uv__set_sys_error(loop, errno);
    return -1;
  }

  uv__handle_init(loop, (uv_handle_t*)handle, UV_FS_EVENT);
  handle->filename = strdup(filename);
  handle->fd = portfd;
  handle->cb = cb;

  memset(&handle->fo, 0, sizeof handle->fo);
  handle->fo.fo_name = handle->filename;
  uv__fs_event_rearm(handle);

  ev_io_init(&handle->event_watcher, uv__fs_event_read, portfd, EV_READ);
  ev_io_start(loop->ev, &handle->event_watcher);
  ev_unref(loop->ev);

  return 0;
}

int ioevent_init(IOEventPoller *ioevent, const int size,
    const int timeout_ms, const int extra_events)
{
  int bytes;

  ioevent->size = size;
  ioevent->extra_events = extra_events;
  ioevent->iterator.index = 0;
  ioevent->iterator.count = 0;

#if IOEVENT_USE_EPOLL
  ioevent->poll_fd = epoll_create(ioevent->size);
  bytes = sizeof(struct epoll_event) * size;
  ioevent->events = (struct epoll_event *)malloc(bytes);
#elif IOEVENT_USE_KQUEUE
  ioevent->poll_fd = kqueue();
  bytes = sizeof(struct kevent) * size;
  ioevent->events = (struct kevent *)malloc(bytes);
  ioevent->care_events = 0;
#elif IOEVENT_USE_PORT
  ioevent->poll_fd = port_create();
  bytes = sizeof(port_event_t) * size;
  ioevent->events = (port_event_t *)malloc(bytes);
#endif

  if (ioevent->events == NULL) {
    return errno != 0 ? errno : ENOMEM;
  }
  ioevent_set_timeout(ioevent, timeout_ms);

  return 0;
}

void ph_nbio_emitter_init(struct ph_nbio_emitter *emitter)
{
  struct sigevent sev;
  port_notify_t notify;
  struct itimerspec ts;

  emitter->io_fd = port_create();
  if (emitter->io_fd == -1) {
    ph_panic("port_create: `Pe%d", errno);
  }

  memset(&sev, 0, sizeof(sev));
  memset(&notify, 0, sizeof(notify));
  memset(&ts, 0, sizeof(ts));

  ts.it_interval.tv_nsec = WHEEL_INTERVAL_MS * 1000000;
  ts.it_value.tv_nsec = ts.it_interval.tv_nsec;

  notify.portnfy_port = emitter->io_fd;
  sev.sigev_notify = SIGEV_PORT;
  sev.sigev_value.sival_ptr = &notify;

  if (timer_create(CLOCK_REALTIME, &sev, &emitter->port_timer)) {
    ph_panic("failed to create timer: `Pe%d", errno);
  }
  if (timer_settime(emitter->port_timer, 0, &ts, NULL)) {
    ph_panic("failed to set timer: `Pe%d", errno);
  }
}

int uv_fs_event_init(uv_loop_t* loop,
                     uv_fs_event_t* handle,
                     const char* filename,
                     uv_fs_event_cb cb,
                     int flags) {
  int portfd;
  int first_run = 0;

  if (loop->fs_fd == -1) {
    if ((portfd = port_create()) == -1) {
      uv__set_sys_error(loop, errno);
      return -1;
    }
    loop->fs_fd = portfd;
    first_run = 1;
  }

  uv__handle_init(loop, (uv_handle_t*)handle, UV_FS_EVENT);
  uv__handle_start(handle); /* FIXME shouldn't start automatically */
  handle->filename = strdup(filename);
  handle->fd = PORT_UNUSED;
  handle->cb = cb;

  memset(&handle->fo, 0, sizeof handle->fo);
  handle->fo.fo_name = handle->filename;
  uv__fs_event_rearm(handle);

  if (first_run) {
    uv__io_init(&loop->fs_event_watcher, uv__fs_event_read, portfd);
    uv__io_start(loop, &loop->fs_event_watcher, UV__POLLIN);
  }

  return 0;
}

static apr_status_t impl_pollcb_create(apr_pollcb_t *pollcb,
                                       apr_uint32_t size,
                                       apr_pool_t *p,
                                       apr_uint32_t flags)
{
    pollcb->fd = port_create();

    if (pollcb->fd < 0) {
        return apr_get_netos_error();
    }

    {
        int flags;

        if ((flags = fcntl(pollcb->fd, F_GETFD)) == -1)
            return errno;

        flags |= FD_CLOEXEC;
        if (fcntl(pollcb->fd, F_SETFD, flags) == -1)
            return errno;
    }

    pollcb->pollset.port = apr_palloc(p, size * sizeof(port_event_t));
    apr_pool_cleanup_register(p, pollcb, cb_cleanup, apr_pool_cleanup_null);

    return APR_SUCCESS;
}

static void*
evport_init(struct event_base *base)
{
	struct evport_data *evpd;
	int i;

	if (!(evpd = mm_calloc(1, sizeof(struct evport_data))))
		return (NULL);

	if ((evpd->ed_port = port_create()) == -1) {
		mm_free(evpd);
		return (NULL);
	}

	/*
	 * Initialize file descriptor structure
	 */
	evpd->ed_fds = mm_calloc(DEFAULT_NFDS, sizeof(struct fd_info));
	if (evpd->ed_fds == NULL) {
		close(evpd->ed_port);
		mm_free(evpd);
		return (NULL);
	}
	evpd->ed_nevents = DEFAULT_NFDS;
	for (i = 0; i < EVENTS_PER_GETN; i++)
		evpd->ed_pending[i] = -1;

	evsig_init(base);

	return (evpd);
}

int uv_fs_event_start(uv_fs_event_t* handle,
                      uv_fs_event_cb cb,
                      const char* filename,
                      unsigned int flags) {
  int portfd;
  int first_run;

  if (uv__is_active(handle))
    return -EINVAL;

  first_run = 0;
  if (handle->loop->fs_fd == -1) {
    portfd = port_create();
    if (portfd == -1)
      return -errno;
    handle->loop->fs_fd = portfd;
    first_run = 1;
  }

  uv__handle_start(handle);
  handle->filename = strdup(filename);
  handle->fd = PORT_UNUSED;
  handle->cb = cb;

  memset(&handle->fo, 0, sizeof handle->fo);
  handle->fo.fo_name = handle->filename;
  uv__fs_event_rearm(handle);  /* FIXME(bnoordhuis) Check return code. */

  if (first_run) {
    uv__io_init(&handle->loop->fs_event_watcher, uv__fs_event_read, portfd);
    uv__io_start(handle->loop, &handle->loop->fs_event_watcher, UV__POLLIN);
  }

  return 0;
}

/*
  Reopen the port handle when our pid changes.
 */
static int port_check_reopen(struct port_event_context *port_ev)
{
	struct tevent_fd *fde;

	if (port_ev->pid == getpid()) {
		return 0;
	}

	close(port_ev->port_fd);
	port_ev->port_fd = port_create();
	if (port_ev->port_fd == -1) {
		tevent_debug(port_ev->ev, TEVENT_DEBUG_FATAL,
				"port_create() failed");
		return -1;
	}

	if (!ev_set_close_on_exec(port_ev->port_fd)) {
		tevent_debug(port_ev->ev, TEVENT_DEBUG_WARNING,
			     "Failed to set close-on-exec, file descriptor may be leaked to children.\n");
	}

	port_ev->pid = getpid();
	for (fde=port_ev->ev->fd_events;fde;fde=fde->next) {
		fde->additional_flags &= PORT_ADDITIONAL_FD_FLAG_HAS_ASSOCIATION;
		if (port_update_event(port_ev, fde) != 0) {
			return -1;
		}
	}
	return 0;
}

PortsEngine::PortsEngine()
{
	int max = ulimit(4, 0);
	if (max > 0)
	{
		MAX_DESCRIPTORS = max;
	}
	else
	{
		ServerInstance->Logs->Log("SOCKET", LOG_DEFAULT, "ERROR: Can't determine maximum number of open sockets!");
		std::cout << "ERROR: Can't determine maximum number of open sockets!" << std::endl;
		ServerInstance->Exit(EXIT_STATUS_SOCKETENGINE);
	}
	EngineHandle = port_create();

	if (EngineHandle == -1)
	{
		ServerInstance->Logs->Log("SOCKET", LOG_SPARSE, "ERROR: Could not initialize socket engine: %s", strerror(errno));
		ServerInstance->Logs->Log("SOCKET", LOG_SPARSE, "ERROR: This is a fatal error, exiting now.");
		std::cout << "ERROR: Could not initialize socket engine: " << strerror(errno) << std::endl;
		std::cout << "ERROR: This is a fatal error, exiting now." << std::endl;
		ServerInstance->Exit(EXIT_STATUS_SOCKETENGINE);
	}
	CurrentSetSize = 0;

	ref = new EventHandler* [GetMaxFds()];
	events = new port_event_t[GetMaxFds()];
	memset(ref, 0, GetMaxFds() * sizeof(EventHandler*));
}

void
wait_init()
{
	struct rlimit fd_new;

	(void) getrlimit(RLIMIT_NOFILE, &init_fd_rlimit);
	(void) getrlimit(RLIMIT_NOFILE, &fd_new);

	fd_new.rlim_max = fd_new.rlim_cur = WAIT_FILES;

	(void) setrlimit(RLIMIT_NOFILE, &fd_new);

	if ((port_fd = port_create()) == -1)
		uu_die("wait_init couldn't port_create");

	wait_info_pool = uu_list_pool_create("wait_info", sizeof (wait_info_t),
	    offsetof(wait_info_t, wi_link), NULL, UU_LIST_POOL_DEBUG);
	if (wait_info_pool == NULL)
		uu_die("wait_init couldn't create wait_info_pool");

	wait_info_list = uu_list_create(wait_info_pool, wait_info_list, 0);
	if (wait_info_list == NULL)
		uu_die("wait_init couldn't create wait_info_list");

	(void) pthread_mutex_init(&wait_info_lock, &mutex_attrs);
}