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From: carolyn@cbmvax.UUCP
Newsgroups: comp.sys.amiga
Subject: Re: MsgPorts, DOS, ACTION_SCREEN_MODE help needed
Message-ID: <2663@cbmvax.UUCP>
Date: Fri, 30-Oct-87 09:57:40 EST
Article-I.D.: cbmvax.2663
Posted: Fri Oct 30 09:57:40 1987
Date-Received: Sun, 1-Nov-87 09:26:13 EST
References: <378NU105451@NDSUVM1>
Reply-To: carolyn@cbmvax.UUCP (Carolyn Scheppner CATS)
Organization: Commodore Technology, West Chester, PA
Lines: 107

In article <378NU105451@NDSUVM1> NU105451@NDSUVM1.BITNET (Walter Reed) writes:
>I am working on a version of MicroEmacs that would support either opening
>a new window or useing the current window and setting its mode to RAW.
>My problem is that I don't know how to get a processes message port.

   You want the MsgPort ("ProcessID" in BCPLese) of the CON: window.

-----

/* sendpkt code - A. Finkel, P. Lindsay, C. Scheppner  CBM */

LONG setRawCon(toggle)
LONG toggle;     /* DOSTRUE (-1L)  or  DOSFALSE (0L) */
   {
   struct MsgPort *conid;
   struct Process *me;
   LONG myargs[8] ,nargs, res1;

   me = (struct Process *) FindTask(NULL);
   conid = (struct MsgPort *) me->pr_ConsoleTask;

   myargs[0]=toggle;
   nargs = 1;
   res1 = (LONG)sendpkt(conid,ACTION_SCREEN_MODE,myargs,nargs);
   return(res1);
   }


LONG findWindow() /* inits conWindow and conUnit (global vars) */
   {
   struct InfoData *id;
   struct MsgPort  *conid;
   struct Process  *me;
   LONG myargs[8] ,nargs, res1;

   /* Alloc to insure longword alignment */
   id = (struct InfoData *)AllocMem(sizeof(struct InfoData),
                                       MEMF_PUBLIC|MEMF_CLEAR);
   if(! id) return(0);
   me = (struct Process *) FindTask(NULL);
   conid = (struct MsgPort *) me->pr_ConsoleTask;

   myargs[0]=((ULONG)id) >> 2;
   nargs = 1;
   res1 = (LONG)sendpkt(conid,ACTION_DISK_INFO,myargs,nargs);
   conWindow = (struct Window *)id->id_VolumeNode;
   conUnit = (struct ConUnit *)
                 ((struct IOStdReq *)id->id_InUse)->io_Unit;
   FreeMem(id,sizeof(struct InfoData));
   return(res1);
   }


LONG sendpkt(pid,action,args,nargs)
struct MsgPort *pid;  /* process indentifier ... (handlers message port ) */
LONG action,          /* packet type ... (what you want handler to do )   */
     args[],          /* a pointer to a argument list */
     nargs;           /* number of arguments in list  */
   {
   struct MsgPort        *replyport;
   struct StandardPacket *packet;
 
   LONG  count, *pargs, res1;

   replyport = (struct MsgPort *) CreatePort(NULL,0);
   if(!replyport) return(NULL);

   packet = (struct StandardPacket *) 
      AllocMem((long)sizeof(struct StandardPacket),MEMF_PUBLIC|MEMF_CLEAR);
   if(!packet) 
      {
      DeletePort(replyport);
      return(NULL);
      }

   packet->sp_Msg.mn_Node.ln_Name = (char *)&(packet->sp_Pkt);
   packet->sp_Pkt.dp_Link         = &(packet->sp_Msg);
   packet->sp_Pkt.dp_Port         = replyport;
   packet->sp_Pkt.dp_Type         = action;

   /* copy the args into the packet */
   pargs = &(packet->sp_Pkt.dp_Arg1);       /* address of first argument */
   for(count=0;count < nargs;count++) 
      pargs[count]=args[count];
 
   PutMsg(pid,packet); /* send packet */

   WaitPort(replyport);
   GetMsg(replyport); 

   res1 = packet->sp_Pkt.dp_Res1;

   FreeMem(packet,(long)sizeof(struct StandardPacket));
   DeletePort(replyport); 

   return(res1);
   }

/* end */


-- 
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Carolyn Scheppner -- CATS   >>Commodore Amiga Technical Support<<
                     UUCP  ...{allegra,ihnp4,rutgers}!cbmvax!carolyn 
                     PHONE 215-431-9180
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