fileptr.c

用于汇编领域的,运用于OS的MAIN函数.基于硬件基础的源代码

#include "fs.h"
void FPTable_init(){
   int i;
   for(i=0;i<MAX_FPT;i++)
      fptable.arr[i].iptr=0; // null ptr means empty
}

int FPTable_find_empty_fptr(){
   int i;
   for(i=0;i<MAX_FPT;i++)
      if (fptable.arr[i].iptr==0) return i;
   panic("file ptr table full\n");
}

struct FilePtr * FPTable_report_new_file(struct Inode *inode){
// alloc file ptr table entry for inode
   struct FilePtr *curr;
   int x = FPTable_find_empty_fptr();
   curr = &(fptable.arr[x]);
   curr->iptr = inode;
   curr->pos=0;
   return curr;
}