incubator-nuttx/net/can/can_notifier.c

/****************************************************************************
 * net/can/can_notifier.c
 *
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.  The
 * ASF licenses this file to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance with the
 * License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
 * License for the specific language governing permissions and limitations
 * under the License.
 *
 ****************************************************************************/

/****************************************************************************
 * Included Files
 ****************************************************************************/

#include <nuttx/config.h>

#include <sys/types.h>
#include <assert.h>

#include <nuttx/wqueue.h>

#include "can/can.h"

#ifdef CONFIG_NET_CAN_NOTIFIER

/****************************************************************************
 * Public Functions
 ****************************************************************************/

/****************************************************************************
 * Name: can_readahead_signal
 *
 * Description:
 *   Read-ahead data has been buffered.  Signal all threads waiting for
 *   read-ahead data to become available.
 *
 *   When read-ahead data becomes available, *all* of the workers waiting
 *   for read-ahead data will be executed.  If there are multiple workers
 *   waiting for read-ahead data then only the first to execute will get the
 *   data.  Others will need to call can_readahead_notifier_setup() once
 *   again.
 *
 * Input Parameters:
 *   conn  - The CAN connection where read-ahead data was just buffered.
 *
 * Returned Value:
 *   None.
 *
 ****************************************************************************/

void can_readahead_signal(FAR struct can_conn_s *conn)
{
  /* This is just a simple wrapper around work_notifier_signal(). */

  work_notifier_signal(WORK_CAN_READAHEAD, conn);
}

#endif /* CONFIG_NET_CAN_NOTIFIER */