Question

我正在修改minix 3.1.6的内核作为我的本科OS项目的一部分，我打算首先分析之前用它实现的调度算法在某个文件中存储每个进程的调度相关信息，可以在以后进行分析。

在修改proc.c时，我在使用fprintf（）将数据存储到某个文件时得到了Multiply定义的错误，同时fopen（）工作正常。

我对这一切都很陌生，所以任何帮助都将受到赞赏。在此先感谢............

这是一段代码..

PRIVATE void sched(rp, queue, front)
register struct proc *rp;           /* process to be scheduled */
int *queue;                 /* return: queue to use */
int *front;                   /* return: front or back */

{

/* This function determines the scheduling policy.  It is called whenever a
 * process must be added to one of the scheduling queues to decide where to
 * insert it.  As a side-effect the process' priority may be updated.  
 */
  int time_left = (rp->p_ticks_left > 0);   /* quantum fully consumed */
   /* Check whether the process has time left. Otherwise give a new quantum 
   * and lower the process' priority, unless the process already is in the 
   * lowest queue.  
   */
  if (! time_left) {                /* quantum consumed ? */
      rp->p_ticks_left = rp->p_quantum_size;    /* give new quantum */
      if (rp->p_priority < (NR_SCHED_QUEUES-1)) {
          rp->p_priority += 1;          /* lower priority */
      }
  }
    FILE *fp = fopen("/usr/newlog.txt","a");
   /* If there is time left, the process is added to the front of its queue, 
   * so that it can immediately run. The queue to use simply is always the
   * process' current priority.*/ 
  fprintf(fp,"{\nprocess name: %s\nprocess quantum: %d\ntime left: %d\nprocess queue: %d\n}\n\n",
  rp->p_name,rp->p_quantum_size,rp->p_ticks_left,rp->p_priority);
  *queue = rp->p_priority;
  *front = time_left;
   fclose(fp);
}

使用fprintf（）时修正定义的错误，同时修改minix 3.1.6的内核

0 个答案: