68951e8d72
* Remove multiple newlines at the end of files * Remove the whitespace from the end of lines
99 lines
3.6 KiB
C
99 lines
3.6 KiB
C
/****************************************************************************
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* net/netdev/netdev_foreach.c
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*
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* Copyright (C) 2007-2009, 2012, 2015 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <debug.h>
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#include <nuttx/net/netdev.h>
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#include "netdev/netdev.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: netdev_foreach
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*
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* Description:
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* Enumerate each registered network device. This function will terminate
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* when either (1) all devices have been enumerated or (2) when a callback
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* returns any non-zero value.
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*
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* NOTE 1: The network must be locked throughout the enumeration.
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* NOTE 2: No checks are made on devices. For examples, callbacks will
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* will be made on network devices that are in the 'down' state.
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* The callback implementations must take into account all
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* network device state. Typically, a network in the down state
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* would not terminate the traversal.
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*
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* Input Parameters:
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* callback - Will be called for each registered device
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* arg - Opaque user argument passed to callback()
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*
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* Returned Value:
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* 0: Enumeration completed
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* 1: Enumeration terminated early by callback
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*
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* Assumptions:
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* The network is locked.
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*
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****************************************************************************/
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int netdev_foreach(netdev_callback_t callback, FAR void *arg)
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{
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FAR struct net_driver_s *dev;
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int ret = 0;
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if (callback != NULL)
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{
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for (dev = g_netdevices; dev; dev = dev->flink)
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{
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if (callback(dev, arg) != 0)
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{
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ret = 1;
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break;
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}
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}
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}
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return ret;
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}
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