IOCTL_FARC_GET_INTERRUPTS

Purpose: query the interrupts occured since the initialization of the ARCNET-adapter

Parameter:
IN:   -
OUT:  ULONG (size of output buffer > = 4 byte)

Comment:
This function returns the number of interrupts, that occured since the last initialization of the ARCNET-adapter. Can be used for examining driver activity.

Possible errors (see also Error codes):
E_FARC_INVALID_HANDLE
E_FARC_BUFFER_TOO_SMALL

Example:
Note, that the following example is only a fragment. It is recommended, that the driver is opened in asynchronous mode and a handle to the driver is available.

OVERLAPPED overlapped;
 DWORD read, err;
 BOOL ret;
ULONG interrupts;

 overlapped.Offset = 0;
 overlapped.OffsetHigh = 0;
 overlapped.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
 
...
 ret = DeviceIoControl(drvhandle,
     IOCTL_FARC_GET_INTERRUPTS,
     NULL, 0,
     &interrupts, sizeof(interrupts),
     &read, &overlapped);
if (!ret)
{
   err = GetLastError();
   if (err == E_FARC_PENDING)
   {
      ret = GetOverlappedResult(drvhandle, &overlapped, &read, TRUE);
      if (!ret)
      {
         err = GetLastError();
         // do errorhandling here
      }
   }
   else
   {
      // other error occured, perhaps wrong handle
   }
}
printf("Interrupts occured = %u",interrupts)
...

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