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From: debate2@watdcsu.waterloo.edu (Dave Oh)
Newsgroups: comp.sys.amiga.tech,comp.sys.amiga
Subject: Re: DiskObject
Message-ID: <4773@watdcsu.waterloo.edu>
Date: 4 Jun 88 22:25:11 GMT
Article-I.D.: watdcsu.4773
References: <4725@watdcsu.waterloo.edu> <54486@sun.uucp> <4751@watdcsu.waterloo.edu> <2135@ur-tut.UUCP> <6148@well.UUCP>
Reply-To: debate2@watdcsu.waterloo.edu (Dave Oh)
Distribution: na
Organization: U. of Waterloo, Ontario
Lines: 54

In article <6148@well.UUCP> ewhac@well.UUCP (Leo 'Bols Ewhac' Schwab) writes:
>In article <2135@ur-tut.UUCP> dpvc@tut.cc.rochester.edu.UUCP (Davide P. Cervone) writes:
>>In article <4751@watdcsu.waterloo.edu> debate2@watdcsu.waterloo.edu (Dave Oh) writes:
>>>The GetDiskObject call returns a pointer to FAST ram, for gadget, diskobject
>>>and image... I've tried to CopyMem(&dobj->do_Gadget.GadgetRender,&nimage,
>>>sizeof(struct Image)); and I get a lock up!  Even in Manx SDB.
>
>	Try this:
>
>	CopyMem (&dobj -> do_Gadget.GadgetRender,
>		 &nimage,
>-->		 (LONG) sizeof (struct Image));
>
>	This is probably what's killing you.
>
 
I tried the above and after looking at the struct dobj after the CopyMem, my
dobj pointers get wacked out of place and I get crazy values for do_type etc.
 
What could be doing this?  I'll show you the bit of code around the CopyMem:
 
IDisk(DiskName)
char *DiskName;
{
  struct DiskObject *gdisk;
  struct DiskList *DiskLst;
  struct Image    *Img;

  char Buffer[36];

  strcpy(Buffer,DiskName);
  strcat(Buffer,":Disk");
  printf("\nName: %s\n",Buffer);

  gdisk=GetDiskObject(Buffer);

  if(gdisk==0)
     printf("---- Cannot Open %s.info file. ----\n",Buffer);
  else {
     Img = (struct Image *)
           AllocRemember(&miscMemList,sizeof(struct Image),CHIPRAM);

     CopyMem(&gdisk->do_Gadget.GadgetRender,&Img,(LONG)sizeof(struct Image));
     gdisk->do_Gadget.GadgetRender = (APTR)Img;

     printf("version: %d\nType: %d\nXpos: %d\nYpos: %d\nStack: %d\n",
     gdisk->do_Version, gdisk->do_Type, gdisk->do_CurrentX, gdisk->do_CurrentY,
     gdisk->do_StackSize);
  }
}

Please help and thanx in advance.
 
:::> Dave Oh		uucp: debate2@watdcsu.waterloo.edu