You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
102 lines
3.8 KiB
102 lines
3.8 KiB
/**************************************************************************** |
|
* net/netdev_count.c |
|
* |
|
* Copyright (C) 2007-2009 Gregory Nutt. All rights reserved. |
|
* Author: Gregory Nutt <gnutt@nuttx.org> |
|
* |
|
* Redistribution and use in source and binary forms, with or without |
|
* modification, are permitted provided that the following conditions |
|
* are met: |
|
* |
|
* 1. Redistributions of source code must retain the above copyright |
|
* notice, this list of conditions and the following disclaimer. |
|
* 2. Redistributions in binary form must reproduce the above copyright |
|
* notice, this list of conditions and the following disclaimer in |
|
* the documentation and/or other materials provided with the |
|
* distribution. |
|
* 3. Neither the name NuttX nor the names of its contributors may be |
|
* used to endorse or promote products derived from this software |
|
* without specific prior written permission. |
|
* |
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
|
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
|
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
|
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
|
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
|
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
|
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
|
* POSSIBILITY OF SUCH DAMAGE. |
|
* |
|
****************************************************************************/ |
|
|
|
/**************************************************************************** |
|
* Included Files |
|
****************************************************************************/ |
|
|
|
#include <nuttx/config.h> |
|
#if defined(CONFIG_NET) && CONFIG_NSOCKET_DESCRIPTORS > 0 |
|
|
|
#include <string.h> |
|
#include <errno.h> |
|
|
|
#include <nuttx/net/uip/uip-arch.h> |
|
|
|
#include "net_internal.h" |
|
|
|
/**************************************************************************** |
|
* Pre-processor Definitions |
|
****************************************************************************/ |
|
|
|
/**************************************************************************** |
|
* Priviate Types |
|
****************************************************************************/ |
|
|
|
/**************************************************************************** |
|
* Private Data |
|
****************************************************************************/ |
|
|
|
/**************************************************************************** |
|
* Public Data |
|
****************************************************************************/ |
|
|
|
/**************************************************************************** |
|
* Private Functions |
|
****************************************************************************/ |
|
|
|
/**************************************************************************** |
|
* Global Functions |
|
****************************************************************************/ |
|
|
|
/**************************************************************************** |
|
* Function: netdev_count |
|
* |
|
* Description: |
|
* Return the number of network devices |
|
* |
|
* Parameters: |
|
* None |
|
* |
|
* Returned Value: |
|
* The number of network devices |
|
* |
|
* Assumptions: |
|
* Called from normal user mode |
|
* |
|
****************************************************************************/ |
|
|
|
int netdev_count(void) |
|
{ |
|
struct uip_driver_s *dev; |
|
int ndev; |
|
|
|
netdev_semtake(); |
|
for (dev = g_netdevices, ndev = 0; dev; dev = dev->flink, ndev++); |
|
netdev_semgive(); |
|
return ndev; |
|
} |
|
|
|
#endif /* CONFIG_NET && CONFIG_NSOCKET_DESCRIPTORS */
|
|
|