Path: utzoo!attcan!uunet!seismo!dimacs.rutgers.edu!mips!troi!peter
From: peter@dbaccess.com (Peter A. Castro)
Newsgroups: comp.sys.amiga.tech
Subject: Re: Children and message ports
Message-ID: <886@troi.dbaccess.com>
Date: 5 Nov 90 22:20:45 GMT
References: <9011021641.AA18389@luke.eecs.wsu.edu>
Organization: DB Access Inc., Santa Clara, CA
Lines: 45

in article <9011021641.AA18389@luke.eecs.wsu.edu>, hakimian@LUKE.EECS.WSU.EDU says:
+ 
+ I have created a child process using CreateProc. In the child I call
+ FindTask to find my task (process) pointer. I then wait on my process
+ message port
+ 
+ proc = (struct Process *)FindTask(0);
+ port = proc->pr_MsgPort;
+ WaitPort(proc);
+ 
+ In the parent I send a message to the child.
+ 
+ procid = CreateProc(name,pri,seg,stack);
+ PutMsg(procid,msg);
+ 
+ The result, Task held ...
+ 
+ The eventual guru is 8700004 (not sure on the # of 0). I think this means
+ bad packet to the dos library. Does it? How did I do that?

   Yes, you did.  The CreateProc() function returns a Process structure
   pointer.  You must extract the MsgPort out of this structure and use
   it in your call : PutMsg(procid->pr_MsgPort,msg).
   Look in your friendly include directory for these:
     libraries/dosextens.h, exec/tasks.h

+ 
+ This code is in a device driver if that makes any difference.
+ 
+ I have commented out the PutMsg to see if that was the problem. It is.
+ what is wrong with my PutMsg? Did I miss something?
+ 
+ By the way the child task is running.
 
  BTW: If you linked your child task with standard startup code, it is
  probably waiting for a cli/workbench startup message in the startup code.
  If you have it, look in the Rom Kernel Manuals.  If I remember correctly,
  there are some *corrected* examples which might help you.
+ 
+ Please reply by email, post, homing pigeon, any way you can! Thanks
-- 
Peter A. Castro                   INTERNET: peter@dbaccess.com        // //|
c/o DB Access Inc.                UUCP: {uunet,mips}!troi!peter      // //||
2900 Gordon Avenue, Suite 101     FAX: (408) 735-0328            \\ // //-||-
Santa Clara, CA 95051-0718        TEL: (408) 735-7545             \// //  ||