rom/dos/nil.c

   1 /*
   2     Copyright © 2014, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc: Special handling for NIL: locks and file handles
   6     Lang: English
   7 */
   8
   9 #include "dos_intern.h"
  10
  11 SIPTR handleNIL(LONG action, SIPTR arg1, SIPTR arg2, SIPTR arg3)
  12 {
  13     switch(action)
  14     {
  15     case(ACTION_FINDUPDATE):
  16     case(ACTION_FINDINPUT):
  17     case(ACTION_FINDOUTPUT):
  18     {
  19         struct FileHandle * fh = BADDR(arg1);
  20         fh->fh_Type = BNULL;
  21         fh->fh_Interactive = DOSFALSE;/* NIL: is not considered interactive */
  22         return (SIPTR)MKBADDR(fh);
  23     }
  24     case(ACTION_INFO): return (SIPTR)0;
  25     case(ACTION_FREE_LOCK):
  26     {
  27         FreeMem((APTR)arg1, sizeof(struct FileLock));
  28         return (SIPTR)0;
  29     }
  30     case(ACTION_COPY_DIR_FH):
  31     {
  32         struct FileLock *fl = AllocMem(sizeof(struct FileLock), MEMF_PUBLIC | MEMF_CLEAR);
  33         fl->fl_Access = SHARED_LOCK;
  34         return (SIPTR)MKBADDR(fl);
  35     }
  36     case(ACTION_FH_FROM_LOCK):
  37     {
  38         struct FileHandle * fh = BADDR(arg2);
  39         fh->fh_Interactive = DOSFALSE;
  40         FreeMem((APTR)arg3, sizeof(struct FileLock));
  41         return (SIPTR)DOSTRUE;
  42     }
  43     case(ACTION_WRITE): return (SIPTR)arg3;
  44     case(ACTION_PARENT_FH): return (SIPTR)BNULL;
  45     default: return TRUE;
  46     }
  47 }