node_id.c

MANTIS是由科罗拉多大学开发的传感器网络嵌入式操作系统。 这是mantis的0.9.5版本的源码。

//  This file is part of MANTIS OS, Operating System
//  See http://mantis.cs.colorado.edu/
//
//  Copyright (C) 2003,2004,2005 University of Colorado, Boulder
//
//  This program is free software; you can redistribute it and/or
//  modify it under the terms of the mos license (see file LICENSE)

/**************************************************************************/
/* File:    node_id.c                                                     */
/* Author   Jeff Rose    [e-mail]                              */
/*   Date:  05/19/2004                                                    */
/*                                                                        */
/* Description: Gets a random ID initially and lets the user set one.     */
/**************************************************************************/
#include "mos.h"
#include "arg.h"

#include <sys/types.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>

boolean retrieved = FALSE;

static uint16_t node_id;

void mos_node_id_init ()
{
   int r;
   pid_t pid = getpid ();
   uint8_t *id;
   
   if (mos_arg_check ("-id", &id)) {
      node_id = atoi (id);
      printf ("Got id: %d\n", node_id);
   } else {
      srand ((unsigned int)pid);
      r = rand ();

      node_id = r % UINT16_MAX;
   }
}

inline uint16_t mos_node_id_get ()
{
   return node_id;
}

void mos_node_id_set (uint16_t new_node_id)
{
   node_id = new_node_id;
}