rom/dos/remdosentry.c

   1 /*
   2     Copyright © 1995-2010, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc:
   6     Lang: english
   7 */
   8 #include <dos/dosextens.h>
   9 #include <proto/exec.h>
  10
  11 /*****************************************************************************
  12
  13     NAME */
  14 #include <proto/dos.h>
  15
  16         AROS_LH1(LONG, RemDosEntry,
  17
  18 /*  SYNOPSIS */
  19         AROS_LHA(struct DosList *, dlist, D1),
  20
  21 /*  LOCATION */
  22         struct DosLibrary *, DOSBase, 112, Dos)
  23
  24 /*  FUNCTION
  25         Removes a given dos list entry from the dos list. Automatically
  26         locks the list for writing.
  27
  28     INPUTS
  29         dlist - pointer to dos list entry.
  30
  31     RESULT
  32         !=0 if all went well, 0 otherwise.
  33
  34     NOTES
  35         Since anybody who wants to use a device or volume node in the
  36         dos list has to lock the list, filesystems may be called with
  37         the dos list locked. So if you want to add a dos list entry
  38         out of a filesystem don't just wait on the lock but serve all
  39         incoming requests until the dos list is free instead.
  40
  41     EXAMPLE
  42
  43     BUGS
  44
  45     SEE ALSO
  46
  47     INTERNALS
  48
  49 *****************************************************************************/
  50 {
  51     AROS_LIBFUNC_INIT
  52     struct DosList *dl;
  53
  54     if(dlist == NULL)
  55         return 0;
  56
  57     dl = LockDosList(LDF_ALL | LDF_WRITE);
  58
  59     while(TRUE)
  60     {
  61         struct DosList *dl2 = BADDR(dl->dol_Next);
  62
  63         if(dl2 == dlist)
  64         {
  65             dl->dol_Next = dlist->dol_Next;
  66             break;
  67         }
  68
  69         dl = dl2;
  70     }
  71
  72     UnLockDosList(LDF_ALL | LDF_WRITE);
  73
  74     return 1;
  75
  76     AROS_LIBFUNC_EXIT
  77 } /* RemDosEntry */