io_netdev.cxx

C++ 编写的EROS RTOS

/*
 * Copyright (C) 1998, 1999, Jonathan S. Shapiro.
 *
 * This file is part of the EROS Operating System.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2,
 * or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#include <kerninc/kernel.hxx>
#include <kerninc/MsgLog.hxx>
#include <arch-kerninc/KernTune.hxx>
#include <kerninc/NetDev.hxx>

NetDev* NetDev::registry[KTUNE_NNETDEV];

NetDev::NetDev()
{
  nUnits = 0;
  devClass = 0;			/* this will pass for unknown. */
  isRegistered = false;
  name = "???";
}

void
NetDev::Register()
{
  if (isRegistered)
    return;

  for (uint32_t i = 0; i < KTUNE_NNETDEV; i++) {
    if (registry[i] == 0) {
      registry[i] = this;
      isRegistered = true;
      return;
    }
  }

  MsgLog::fatal("Net device limit exceeded\n");
}

#if 0
void
NetDev::Unregister()
{
  if (isRegistered == false)
    return;

  for (uint32_t i = 0; i < KTUNE_NNETDEV; i++) {
    if (registry[i] == this) {
      registry[i] = 0;
      isRegistered = false;
      return;
    }
  }
}
#endif