rom/dos/dosdoio.c

   1 /*
   2     Copyright © 1995-2007, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc: Start an IO request and wait until it completes.
   6     Lang: English
   7 */
   8 #include <exec/execbase.h>
   9 #include <exec/io.h>
  10 #include <dos/dos.h>
  11 #include <aros/libcall.h>
  12 #include <proto/exec.h>
  13
  14 /*****************************************************************************
  15
  16     NAME */
  17
  18         BYTE DosDoIO(
  19
  20 /*  SYNOPSIS */
  21         struct IORequest * iORequest,
  22
  23 /*  LOCATION */
  24         struct ExecBase * SysBase)
  25
  26 /*  FUNCTION
  27         It's like the exec's DoIO, but this one handles CTRL-C.
  28
  29     INPUTS
  30         iORequest - Pointer to iorequest structure.
  31
  32     RESULT
  33
  34     NOTES
  35
  36     EXAMPLE
  37
  38     BUGS
  39
  40     SEE ALSO
  41         OpenDevice(), CloseDevice(), DoIO(), SendIO(), AbortIO(), WaitIO()
  42
  43     INTERNALS
  44
  45 ******************************************************************************/
  46 {
  47 #if 1
  48     return DoIO(iORequest);
  49 #else
  50     /*
  51         Prepare the message. Tell the device that it is OK to wait in the
  52         BeginIO() call by setting the quick bit.
  53     */
  54     iORequest->io_Flags=IOF_QUICK;
  55     iORequest->io_Message.mn_Node.ln_Type=0;
  56
  57     /* Call BeginIO() vector */
  58     AROS_LVO_CALL1NR(void,
  59         AROS_LCA(struct IORequest *,iORequest,A1),
  60         struct Device *,iORequest->io_Device,5,
  61     );
  62
  63     /* If the quick flag is cleared it wasn't done quick. Wait for completion. */
  64     if(!(iORequest->io_Flags&IOF_QUICK))
  65     {
  66         ULONG iosigf = 1<<iORequest->io_Message.mn_ReplyPort->mp_SigBit;
  67         ULONG sigs = 0;
  68
  69
  70 loop:
  71         while
  72         (
  73             !(sigs & SIGBREAKF_CTRL_C)  &&
  74
  75             !(iORequest->io_Flags&IOF_QUICK) &&
  76             iORequest->io_Message.mn_Node.ln_Type==NT_MESSAGE
  77         )
  78         {
  79             sigs = Wait(iosigf | SIGBREAKF_CTRL_C);
  80         }
  81
  82         if(iORequest->io_Message.mn_Node.ln_Type==NT_REPLYMSG)
  83         {
  84             /* Arbitrate for the message queue. */
  85             Disable();
  86
  87             /* Remove the message */
  88             Remove(&iORequest->io_Message.mn_Node);
  89             Enable();
  90         }
  91         else
  92         if (sigs & SIGBREAKF_CTRL_C)
  93         {
  94             AbortIO(iORequest);
  95             sigs = 0;
  96
  97             goto loop;
  98         }
  99     }
 100
 101     /* All done. Get returncode. */
 102     return iORequest->io_Error;
 103
 104 #endif
 105 } /* DosDoIO */
 106