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PUBLIC int sys_sendrec(int function, int src_dest, MESSAGE *p_msg, PROCESS *p_proc)
{
	 assert(k_reenter == 0);
	 assert((src_dest >= 0 && src_dest < NR_TASKS + NR_PROCS) ||
			src_dest == ANY ||
			src_dest == INTERRUPT);

	 int ret = 0;
         int caller = proc2pid(p_proc);
	 MESSAGE *mla = (MESSAGE *)va2la(caller, p_msg);
	 mla->source = caller;

	 assert(mla->source != src_dest);

	 /* Actually we have the third message type: BOTH. However, it is not
	 * allowed to be passed to the kernel directly. Kernel doesn't know
	 * it at all. It is transformed into a SEDN followed by a RECEIVE
	 * by 'send_recv()'.
	 */
	 if(function == SEND)
	 {
		  /* ret = msg_send(p_proc, src_dest, p_msg); */
		  if(ret != 0)
		  {
			   return ret;
		  }
	 }
	 else if(function == RECEIVE)
	 {
		  /* ret = msg_receive(p_proc, src_dest, p_msg); */
		  if(ret != 0)
		  {
			   return ret;
		  }
	 }
	 else
	 {
		  panic("{sys_sendrec} invalid function: "
				"%d (SEND: %d, RECEIVE: %d).",
				function, SEND, RECEIVE);
	 }
	 return 0;
}

Code: Select all

 MESSAGE *mla = (MESSAGE *)va2la(caller, p_msg);
 mla->source = caller;