rom/disk/allocunit.c

   1 /*
   2     Copyright © 1995-2001, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc: AllocUnit() function.
   6     Lang: english
   7 */
   8
   9 #include <proto/disk.h>
  10 #include <resources/disk.h>
  11
  12 AROS_LH1(BOOL, AllocUnit,
  13          AROS_LHA(LONG, unitNum, D0),
  14          struct DiscResource *, DiskBase, 1, Disk)
  15 {
  16     AROS_LIBFUNC_INIT
  17
  18         if (DiskBase->dr_Flags & (1 << unitNum))
  19                 return 0;
  20         DiskBase->dr_Flags |= 1 << unitNum;
  21     return 1;
  22
  23     AROS_LIBFUNC_EXIT
  24 }