C++ GNUNET_SCHEDULER_cancel函数代码示例

static void
end_badly (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
  if (send_task != GNUNET_SCHEDULER_NO_TASK)
  {
    GNUNET_SCHEDULER_cancel (send_task);
    send_task = GNUNET_SCHEDULER_NO_TASK;
  }

  if (shutdown_task != GNUNET_SCHEDULER_NO_TASK)
  {
    GNUNET_SCHEDULER_cancel (shutdown_task);
    shutdown_task = GNUNET_SCHEDULER_NO_TASK;
  }

  if (cc != NULL)
  {
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Fail! Could not connect peers\n"));
    GNUNET_TRANSPORT_TESTING_connect_peers_cancel (tth, cc);
    cc = NULL;
  }

  if (th != NULL)
    GNUNET_TRANSPORT_notify_transmit_ready_cancel (th);
  th = NULL;

  if (blacklist_p1 != NULL)
    GNUNET_TRANSPORT_blacklist_cancel (blacklist_p1);

  if (blacklist_p2 != NULL)
    GNUNET_TRANSPORT_blacklist_cancel (blacklist_p2);

  if (p1 != NULL)
    GNUNET_TRANSPORT_TESTING_stop_peer (tth, p1);
  if (p2 != NULL)
    GNUNET_TRANSPORT_TESTING_stop_peer (tth, p2);

  ok = GNUNET_SYSERR;
}

/**
 * Stop tasks that modify clock behavior.
 */
void
GNUNET_SPEEDUP_stop_ ()
{
  if (NULL != speedup_task)
  {
    GNUNET_SCHEDULER_cancel (speedup_task);
    speedup_task = NULL;
  }
  if ( (0 != interval.rel_value_us) &&
       (0 != delta.rel_value_us) )
    LOG (GNUNET_ERROR_TYPE_DEBUG,
	 "Stopped execution speed up\n");
}

static void
end ()
{
  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Stopping peers\n");

  if (timer_task != NULL)
  {
    GNUNET_SCHEDULER_cancel (timer_task);
    timer_task = NULL;
  }

  if (die_task != NULL)
  {
    GNUNET_SCHEDULER_cancel (die_task);
    die_task = NULL;
  }

  if (th != NULL)
    GNUNET_TRANSPORT_notify_transmit_ready_cancel (th);
  th = NULL;


  GNUNET_TRANSPORT_TESTING_stop_peer (tth, p1);
  GNUNET_TRANSPORT_TESTING_stop_peer (tth, p2);

  if (disconnects == 0)
    ok = 0;
  else
  {
    ok = disconnects;
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                "Fail! Had %u disconnects while waiting %s\n",
                disconnects,
		GNUNET_STRINGS_relative_time_to_string (WAIT,
							GNUNET_YES));
  }

  GNUNET_TRANSPORT_TESTING_done (tth);
}

static void
end_badly (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
  die_task = GNUNET_SCHEDULER_NO_TASK;

  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Fail! Stopping peers\n");

  if (restarted == GNUNET_YES)
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Peer was restarted\n");

  if (restarted == GNUNET_NO)
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Peer was NOT restarted\n");

  if (reconnect_task != GNUNET_SCHEDULER_NO_TASK)
    GNUNET_SCHEDULER_cancel (reconnect_task);
  reconnect_task = GNUNET_SCHEDULER_NO_TASK;

  if (send_task != GNUNET_SCHEDULER_NO_TASK)
    GNUNET_SCHEDULER_cancel (send_task);
  send_task = GNUNET_SCHEDULER_NO_TASK;

  if (cc != NULL)
  {
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Fail! Could not connect peers\n"));
    GNUNET_TRANSPORT_TESTING_connect_peers_cancel (tth, cc);
    cc = NULL;
  }

  if (th != NULL)
    GNUNET_TRANSPORT_notify_transmit_ready_cancel (th);
  th = NULL;

  if (p1 != NULL)
    GNUNET_TRANSPORT_TESTING_stop_peer (tth, p1);
  if (p2 != NULL)
    GNUNET_TRANSPORT_TESTING_stop_peer (tth, p2);

  ok = GNUNET_SYSERR;
}

/**
 * Something went wrong and timed out. Kill everything and set error flag
 */
static void
do_abort (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "ABORT\n");
  result = GNUNET_SYSERR;
  abort_task = NULL;
  if (NULL != shutdown_task)
  {
    GNUNET_SCHEDULER_cancel (shutdown_task);
    shutdown_task = NULL;
  }
  do_shutdown (cls, tc);
}

/**
 * Cancel notification upon flush.  Should only be used when the flush
 * completion callback given to GNUNET_TESTBED_LOGGER_flush() is not already
 * called.
 *
 * @param h the logger handle
 */
void
GNUNET_TESTBED_LOGGER_flush_cancel (struct GNUNET_TESTBED_LOGGER_Handle *h)
{
  if (GNUNET_SCHEDULER_NO_TASK != h->flush_completion_task)
  {
    GNUNET_SCHEDULER_cancel (h->flush_completion_task);
    h->flush_completion_task = GNUNET_SCHEDULER_NO_TASK;
  }
  if (GNUNET_SCHEDULER_NO_TASK != h->timeout_flush_task)
    cancel_timeout_flush (h);
  h->cb = NULL;
  h->cb_cls = NULL;
}

static void
end_badly (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
  die_task = NULL;

  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Fail! Stopping peers\n");


  if (send_task != NULL)
    GNUNET_SCHEDULER_cancel (send_task);

  if (cc != NULL)
  {
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Fail! Could not connect peers\n"));
    GNUNET_TRANSPORT_TESTING_connect_peers_cancel (tth, cc);
    cc = NULL;
  }

  if (th != NULL)
    GNUNET_TRANSPORT_notify_transmit_ready_cancel (th);
  else
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Peer were not ready to send data\n"));

  if (s_started == GNUNET_NO)
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Peers were not started \n"));
  else
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Peers were started \n"));

  if (s_connected == GNUNET_NO)
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Peer were not connected\n"));
  else
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Peer were connected\n"));

  if (s_sending == GNUNET_NO)
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Peer were not ready to send data\n"));
  else
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Peer were ready to send data\n"));

  th = NULL;

  if (p1 != NULL)
    GNUNET_TRANSPORT_TESTING_stop_peer (tth, p1);
  else
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Peer 1 was not started\n"));
  if (p2 != NULL)
    GNUNET_TRANSPORT_TESTING_stop_peer (tth, p2);
  else
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Peer 2 was not started\n"));

  ok = GNUNET_SYSERR;
}

/**
 * Ask the connection to call us once the specified number of bytes
 * are free in the transmission buffer.  May call the notify
 * method immediately if enough space is available.
 *
 * @param connection connection
 * @param size number of bytes to send
 * @param timeout after how long should we give up (and call
 *        notify with buf NULL and size 0)?
 * @param notify function to call
 * @param notify_cls closure for notify
 * @return non-NULL if the notify callback was queued,
 *         NULL if we are already going to notify someone else (busy)
 */
struct GNUNET_CONNECTION_TransmitHandle *
GNUNET_CONNECTION_notify_transmit_ready (struct GNUNET_CONNECTION_Handle *connection,
                                         size_t size,
                                         struct GNUNET_TIME_Relative timeout,
                                         GNUNET_CONNECTION_TransmitReadyNotify
                                         notify, void *notify_cls)
{
  if (NULL != connection->nth.notify_ready)
  {
    GNUNET_assert (0);
    return NULL;
  }
  GNUNET_assert (NULL != notify);
  GNUNET_assert (size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
  GNUNET_assert (connection->write_buffer_off <= connection->write_buffer_size);
  GNUNET_assert (connection->write_buffer_pos <= connection->write_buffer_size);
  GNUNET_assert (connection->write_buffer_pos <= connection->write_buffer_off);
  connection->nth.notify_ready = notify;
  connection->nth.notify_ready_cls = notify_cls;
  connection->nth.connection = connection;
  connection->nth.notify_size = size;
  connection->nth.transmit_timeout = GNUNET_TIME_relative_to_absolute (timeout);
  GNUNET_assert (GNUNET_SCHEDULER_NO_TASK == connection->nth.timeout_task);
  if ((NULL == connection->sock) && 
      (NULL == connection->ap_head) &&
      (NULL == connection->dns_active))
  {
    if (GNUNET_SCHEDULER_NO_TASK != connection->write_task)
      GNUNET_SCHEDULER_cancel (connection->write_task);
    connection->write_task = GNUNET_SCHEDULER_add_now (&connect_error, connection);
    return &connection->nth;
  }
  if (GNUNET_SCHEDULER_NO_TASK != connection->write_task)
    return &connection->nth; /* previous transmission still in progress */
  if (NULL != connection->sock)
  {
    /* connected, try to transmit now */
    LOG (GNUNET_ERROR_TYPE_DEBUG, "Scheduling transmission (%p).\n", connection);
    connection->write_task =
        GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_absolute_get_remaining
                                        (connection->nth.transmit_timeout),
                                        connection->sock, &transmit_ready, connection);
    return &connection->nth;
  }
  /* not yet connected, wait for connection */
  LOG (GNUNET_ERROR_TYPE_DEBUG,
       "Need to wait to schedule transmission for connection, adding timeout task (%p).\n", connection);
  connection->nth.timeout_task =
    GNUNET_SCHEDULER_add_delayed (timeout, &transmit_timeout, connection);
  return &connection->nth;
}

/**
 * Function called on result for a GNS lookup
 *
 * @param cls closure, unused
 * @param rd_count number of records
 * @param rd the records in reply
 */
static void
on_lookup_result(void *cls, uint32_t rd_count,
                 const struct GNUNET_NAMESTORE_RecordData *rd)
{
  struct in_addr a;
  uint32_t i;
  char* addr;

  lr = NULL;
  if (GNUNET_SCHEDULER_NO_TASK != die_task)
  {
      GNUNET_SCHEDULER_cancel (die_task);
      die_task = GNUNET_SCHEDULER_NO_TASK;
  }
  GNUNET_NAMESTORE_disconnect (namestore_handle);
  namestore_handle = NULL;
  if (rd_count == 0)
  {
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                "Lookup failed, rp_filtering?\n");
    ok = 2;
  }
  else
  {
    ok = 1;
    GNUNET_log (GNUNET_ERROR_TYPE_INFO, "name: %s\n", (char*)cls);
    for (i=0; i<rd_count; i++)
    {
      GNUNET_log (GNUNET_ERROR_TYPE_INFO, "type: %d\n", rd[i].record_type);
      if (rd[i].record_type == GNUNET_GNS_RECORD_A)
      {
        memcpy (&a, rd[i].data, sizeof(a));
        addr = inet_ntoa(a);
        GNUNET_log (GNUNET_ERROR_TYPE_INFO, "address: %s\n", addr);
        if (0 == strcmp (addr, TEST_IP))
        {
          GNUNET_log (GNUNET_ERROR_TYPE_INFO,
		      "%s correctly resolved to %s!\n",
		      TEST_DOMAIN, addr);
          ok = 0;
        }
      }
      else
      {
        GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
		    "No resolution!\n");
      }
    }
  }
  GNUNET_SCHEDULER_add_now (&shutdown_task, NULL);
}

/**
 * Check if the get_handle is being used, if so stop the request.  Either
 * way, schedule the end_badly_cont function which actually shuts down the
 * test.
 */
static void
end_badly (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
  die_task = GNUNET_SCHEDULER_NO_TASK;
  int c;

  if (GNUNET_SCHEDULER_NO_TASK != wait_task)
  {
      GNUNET_SCHEDULER_cancel (wait_task);
      wait_task = GNUNET_SCHEDULER_NO_TASK;
  }

  for (c = 0; c < 3; c++)
  {
    if (NULL != nh[c])
    {
      GNUNET_NAMESTORE_disconnect(nh[c]);
      nh[c] = NULL;
    }

    if (NULL != get_cfg_ops[c])
    {
        GNUNET_TESTBED_operation_done(get_cfg_ops[c]);
        get_cfg_ops[c] = NULL;
    }
    if (NULL != cfg_handles[c])
    {
      GNUNET_CONFIGURATION_destroy (cfg_handles[c]);
      cfg_handles[c] = NULL;
    }
  }
  if (NULL != topology_op)
  {
    GNUNET_TESTBED_operation_done (topology_op);
    topology_op = NULL;
  }
  if (NULL != lookup_handle)
  {
    GNUNET_GNS_cancel_lookup_request (lookup_handle);
    lookup_handle = NULL;
  }
  if (NULL != gh)
  {
    GNUNET_GNS_disconnect(gh);
    gh = NULL;
  }
  
  GNUNET_log (GNUNET_ERROR_TYPE_INFO, "Test failed \n");
  GNUNET_SCHEDULER_shutdown ();
  ok = 1;
}

/**
 * Remove a mapping created with (mini)upnpc.  Calling
 * this function will give 'upnpc' 1s to remove tha mapping,
 * so while this function is non-blocking, a task will be
 * left with the scheduler for up to 1s past this call.
 *
 * @param mini the handle
 */
void
GNUNET_NAT_mini_map_stop (struct GNUNET_NAT_MiniHandle *mini)
{
  char pstr[6];

  if (NULL != mini->refresh_task)
  {
    GNUNET_SCHEDULER_cancel (mini->refresh_task);
    mini->refresh_task = NULL;
  }
  if (NULL != mini->refresh_cmd)
  {
    GNUNET_OS_command_stop (mini->refresh_cmd);
    mini->refresh_cmd = NULL;
  }
  if (NULL != mini->map_cmd)
  {
    GNUNET_OS_command_stop (mini->map_cmd);
    mini->map_cmd = NULL;
  }
  if (GNUNET_NO == mini->did_map)
  {
    GNUNET_free (mini);
    return;
  }
  mini->ac (mini->ac_cls,
	    GNUNET_NO,
            (const struct sockaddr *) &mini->current_addr,
            sizeof (mini->current_addr),
            GNUNET_NAT_ERROR_SUCCESS);
  /* Note: oddly enough, deletion uses the external port whereas
   * addition uses the internal port; this rarely matters since they
   * often are the same, but it might... */
  GNUNET_snprintf (pstr,
                   sizeof (pstr),
                   "%u",
                   (unsigned int) ntohs (mini->current_addr.sin_port));
  LOG (GNUNET_ERROR_TYPE_DEBUG,
       "Unmapping port %u with UPnP\n",
       ntohs (mini->current_addr.sin_port));
  mini->unmap_cmd 
    = GNUNET_OS_command_run (&process_unmap_output,
			     mini,
			     UNMAP_TIMEOUT,
                             "upnpc",
			     "upnpc",
			     "-d",
			     pstr,
                             mini->is_tcp ? "tcp" : "udp",
			     NULL);
}

static void
put_cont (void *cls, int32_t success, const char *emsg)
{
  static int c = 0;

  if (success == GNUNET_OK)
  {
    c++;
    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Created record %u \n", c);
  }
  else
  {
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Failed to created records\n");
    GNUNET_break (0);
    GNUNET_SCHEDULER_cancel (endbadly_task);
    endbadly_task = GNUNET_SCHEDULER_add_now (&endbadly, NULL);
  }

  if (c == 3)
  {
    res = 1;
    returned_records = 0;
    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "All records created, starting iteration over all zones \n");
    zi = GNUNET_NAMESTORE_zone_iteration_start(nsh,
                                        NULL,
                                        GNUNET_NAMESTORE_RF_NONE,
                                        GNUNET_NAMESTORE_RF_NONE,
                                        zone_proc,
                                        &zone);
    if (zi == NULL)
    {
      GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Failed to create zone iterator\n");
      GNUNET_break (0);
      GNUNET_SCHEDULER_cancel (endbadly_task);
      endbadly_task = GNUNET_SCHEDULER_add_now (&endbadly, NULL);
    }
  }
}

static void
end ()
{
  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, 
	      "Stopping peers\n");

  if (timeout_task != NULL)
    GNUNET_SCHEDULER_cancel (timeout_task);

  GNUNET_TRANSPORT_TESTING_stop_peer (tth, p1);
  GNUNET_TRANSPORT_TESTING_stop_peer (tth, p2);

  GNUNET_TRANSPORT_TESTING_done (tth);
}

/**
 * Handle ANNOUNCE message.
 *
 * @param cls closure
 * @param client identification of the client
 * @param message the actual message
 */
static void
handle_announce (void *cls,
		 struct GNUNET_SERVER_Client *client,
		 const struct GNUNET_MessageHeader *message)
{
  const struct AnnounceMessage *am;
  const char *regex;
  struct ClientEntry *ce;
  uint16_t size;

  size = ntohs (message->size);
  am = (const struct AnnounceMessage *) message;
  regex = (const char *) &am[1];
  if ( (size <= sizeof (struct AnnounceMessage)) ||
       ('\0' != regex[size - sizeof (struct AnnounceMessage) - 1]) )
  {
    GNUNET_break (0);
    GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
    return;
  }

  ce = GNUNET_new (struct ClientEntry);
  ce->client = client;
  ce->frequency = GNUNET_TIME_relative_ntoh (am->refresh_delay);
  ce->refresh_task = GNUNET_SCHEDULER_add_delayed (ce->frequency,
						   &reannounce,
						   ce);
  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
	      "Starting to announce regex `%s' every %s\n",
	      regex,
	      GNUNET_STRINGS_relative_time_to_string (ce->frequency,
						      GNUNET_NO));
  ce->ah = REGEX_INTERNAL_announce (dht,
				    my_private_key,
				    regex,
				    ntohs (am->compression),
				    stats);
  if (NULL == ce->ah)
  {
    GNUNET_break (0);
    GNUNET_SCHEDULER_cancel (ce->refresh_task);
    GNUNET_free (ce);
    GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
    return;
  }
  GNUNET_CONTAINER_DLL_insert (client_head,
			       client_tail,
			       ce);
  GNUNET_SERVER_receive_done (client, GNUNET_OK);
}

static void
abort_publish_task (void *cls)
{
  if (NULL != publish)
  {
    GNUNET_FS_publish_stop (publish);
    publish = NULL;
  }
  if (NULL != timeout_task)
  {
    GNUNET_SCHEDULER_cancel (timeout_task);
    timeout_task = NULL;
  }
}