rom/dos/samedevice.c

   1 /*
   2     Copyright © 1995-2007, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc:
   6     Lang: english
   7 */
   8 #include "dos_intern.h"
   9
  10 /*****************************************************************************
  11
  12     NAME */
  13 #include <proto/dos.h>
  14
  15         AROS_LH2(BOOL, SameDevice,
  16
  17 /*  SYNOPSIS */
  18         AROS_LHA(BPTR, lock1, D1),
  19         AROS_LHA(BPTR, lock2, D2),
  20
  21 /*  LOCATION */
  22         struct DosLibrary *, DOSBase, 164, Dos)
  23
  24 /*  FUNCTION
  25         Checks if two locks are on the same device.
  26
  27     INPUTS
  28         lock1, lock2 - locks
  29
  30     RESULT
  31         DOSTRUE when they are on the same device
  32
  33     NOTES
  34
  35     EXAMPLE
  36
  37     BUGS
  38
  39     SEE ALSO
  40
  41     INTERNALS
  42
  43 *****************************************************************************/
  44 {
  45     AROS_LIBFUNC_INIT
  46
  47     struct FileHandle *fh1, *fh2;
  48
  49     if (lock1 == NULL || lock2 == NULL)
  50         return DOSFALSE;
  51
  52     fh1 = (struct FileHandle *)BADDR(lock1);
  53     fh2 = (struct FileHandle *)BADDR(lock2);
  54
  55     /* XXX this isn't enough. two filesystems of the same type are different
  56      * "devices" but will have the same value for fh_Device. there's no good
  57      * way to fix (the only bad way involves hoops with NameFromLock() */
  58     if (fh1->fh_Device == fh2->fh_Device)
  59         return DOSTRUE;
  60
  61
  62     return DOSFALSE;
  63     AROS_LIBFUNC_EXIT
  64 } /* SameDevice */