Path: utzoo!utgpu!water!watmath!clyde!att!alberta!andrew
From: andrew@alberta.UUCP (Andrew Folkins)
Newsgroups: comp.sys.amiga.tech
Subject: CreateProc() & WBStartup messages
Message-ID: <1472@pembina.UUCP>
Date: 25 Jul 88 05:29:01 GMT
Organization: U. of Alberta, Edmonton, AB
Lines: 57

[ For all you do, this line's for you. ]


Here's the scenario : I want to LoadSeg() and CreateProc() a subprogram
which uses the standard Lattice 4.0 startup code (c.o).  Almost everything
works fine : I send the process a fake WBStartup message, it executes,
exits, and I get the message back.  Fine.  Except that I keep getting
a ToolWindow, even though the WBStartup->sm_ToolWindow is NULL.  Any ideas?

short StartProcess(filename)
char *filename;
{
   int seg;
   struct WBStartup *msg;
   struct MsgPort *proc_port;

   msg = (struct WBStartup *)AllocMem(sizeof(struct WBStartup),
                                      MEMF_CLEAR | MEMF_PUBLIC);
   if (!msg) goto nostart;
   msg->sm_Message.mn_Node.ln_Type = NT_MESSAGE;
   msg->sm_Message.mn_ReplyPort = WBPort;    /* previously CreatePort()ed */
   msg->sm_Message.mn_Length = sizeof(struct WBStartup);
   msg->sm_NumArgs = (long)0;
   msg->sm_ArgList = (struct WBArg *)NULL;
   msg->sm_ToolWindow = (char *)NULL;   /* I know this is overkill, but ... */

   if ((seg = LoadSeg(filename)) == NULL)
      goto nostart;
   if (proc_port = CreateProc(filename, PRIORITY, seg, STACKSIZE)) {
      msg->sm_Process = proc_port;
      msg->sm_Segment = seg;
      PutMsg(proc_port, (struct Message *)msg);     /* Fake WBStartup */
      return(TRUE);
   }

nostart :
   if (msg) FreeMem((char *)msg, sizeof(struct WBStartup));
   return(FALSE);
}



and in c.o's workbench startup code we find :

do_cons:
        move.l sm_ToolWindow(a2),d1   * a2 = WBenchMsg
        beq.s  do_main
        *
        * call Open, etc.             * It shouldn't be doing this, but it is
        *

--
Andrew Folkins        ...ihnp4!alberta!andrew    
The University of Alberta, Edmonton, Alberta, Canada      
 
Remember, when all else is said and done, at least *we* have someplace to
park our keyboards.