1  extern int clobber_k (int *); 
       2  extern int barrier (void); 
       3  int t, u; 
       4  
       5  int
       6  process_second_stream(void) 
       7  { 
       8    int k; 
       9    int i = 0, j = 0, result; 
      10   
      11    clobber_k (&k); 
      12   
      13    while(t)
      14      ;
      15   
      16    while(!j) 
      17      {
      18        while(!j) 
      19  	{ 
      20  	  barrier (); 
      21  	  if (t == 0) 
      22  	    break; 
      23  	  else if(t == 1) 
      24  	    t = 2; 
      25  	  else 
      26  	    {
      27  	      if(t < 0) 
      28  		j=1; 
      29  	      if(u < 0) 
      30  		k = i++; 
      31  	    }
      32  	} 
      33   
      34        if(!j && u) 
      35  	j=1; 
      36      } 
      37   
      38    return 0; 
      39  }