rom/exec/checkio.c

   1 /*
   2     Copyright © 1995-2001, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc: Check if an I/O request is completed.
   6     Lang: english
   7 */
   8 #include <exec/execbase.h>
   9 #include <exec/io.h>
  10 #include <aros/libcall.h>
  11 #include <proto/exec.h>
  12
  13 /*****************************************************************************
  14
  15     NAME */
  16
  17         AROS_LH1I(struct IORequest *, CheckIO,
  18
  19 /*  SYNOPSIS */
  20         AROS_LHA(struct IORequest *, iORequest, A1),
  21
  22 /*  LOCATION */
  23         struct ExecBase *, SysBase, 78, Exec)
  24
  25 /*  FUNCTION
  26         Check if an I/O request is completed.
  27
  28     INPUTS
  29         iORequest - Pointer to iorequest structure.
  30
  31     RESULT
  32         Pointer to the iorequest structure or NULL if the device is still
  33         at work.
  34
  35     NOTES
  36
  37     EXAMPLE
  38
  39     BUGS
  40
  41     SEE ALSO
  42         OpenDevice(), CloseDevice(), DoIO(), SendIO(), AbortIO(), WaitIO()
  43
  44     INTERNALS
  45
  46 ******************************************************************************/
  47 {
  48     AROS_LIBFUNC_INIT
  49
  50     /*
  51         The I/O request is still in use if it wasn't done quick
  52         and isn't yet replied (ln_Type==NT_MESSAGE).
  53     */
  54     if(!(iORequest->io_Flags&IOF_QUICK)&&
  55        iORequest->io_Message.mn_Node.ln_Type==NT_MESSAGE)
  56
  57         /* Still in use */
  58         return NULL;
  59     else
  60         /* done */
  61         return iORequest;
  62
  63     AROS_LIBFUNC_EXIT
  64 } /* CheckIO */
  65