reactos/ntoskrnl/kdbg/kdb_serial.c

   1 /* $Id$
   2  *
   3  * COPYRIGHT:       See COPYING in the top level directory
   4  * PROJECT:         ReactOS kernel
   5  * FILE:            ntoskrnl/dbg/kdb_serial.c
   6  * PURPOSE:         Serial driver
   7  *
   8  * PROGRAMMERS:     Victor Kirhenshtein (sauros@iname.com)
   9  *                  Jason Filby (jasonfilby@yahoo.com)
  10  *                  arty
  11  */
  12
  13 /* INCLUDES ****************************************************************/
  14
  15 #include <ntoskrnl.h>
  16 #define NDEBUG
  17 #include <debug.h>
  18
  19 CHAR
  20 KdbpTryGetCharSerial(UINT Retry)
  21 {
  22   CHAR Result = -1;
  23
  24   if (Retry == 0)
  25      while (!KdPortGetByteEx(&SerialPortInfo, (PUCHAR)&Result));
  26   else
  27      while (!KdPortGetByteEx(&SerialPortInfo, (PUCHAR)&Result) && Retry-- > 0);
  28
  29   return Result;
  30 }