drivers/sac/driver/dispatch.c

   1 /*
   2  * PROJECT:     ReactOS Drivers
   3  * LICENSE:     BSD - See COPYING.ARM in the top level directory
   4  * FILE:        drivers/sac/driver/dispatch.c
   5  * PURPOSE:     Driver for the Server Administration Console (SAC) for EMS
   6  * PROGRAMMERS: ReactOS Portable Systems Group
   7  */
   8
   9 /* INCLUDES ******************************************************************/
  10
  11 #include "sacdrv.h"
  12
  13 /* GLOBALS *******************************************************************/
  14
  15 LONG TimerDpcCount;
  16
  17 /* FUNCTIONS *****************************************************************/
  18
  19 NTSTATUS
  20 NTAPI
  21 DispatchDeviceControl(IN PDEVICE_OBJECT DeviceObject,
  22                       IN PIRP Irp)
  23 {
  24     return STATUS_NOT_IMPLEMENTED;
  25 }
  26
  27 NTSTATUS
  28 NTAPI
  29 DispatchShutdownControl(IN PDEVICE_OBJECT DeviceObject,
  30                         IN PIRP Irp)
  31 {
  32     return STATUS_NOT_IMPLEMENTED;
  33 }
  34
  35 NTSTATUS
  36 NTAPI
  37 DispatchCreate(IN PSAC_DEVICE_EXTENSION DeviceExtension,
  38                IN PIRP Irp)
  39 {
  40     return STATUS_NOT_IMPLEMENTED;
  41 }
  42
  43 NTSTATUS
  44 NTAPI
  45 DispatchClose(IN PSAC_DEVICE_EXTENSION DeviceExtension,
  46               IN PIRP Irp)
  47 {
  48     return STATUS_NOT_IMPLEMENTED;
  49 }
  50
  51 NTSTATUS
  52 NTAPI
  53 Dispatch(IN PDEVICE_OBJECT DeviceObject,
  54          IN PIRP Irp)
  55 {
  56     return STATUS_NOT_IMPLEMENTED;
  57 }
  58
  59 VOID
  60 NTAPI
  61 TimerDpcRoutine(IN PKDPC Dpc,
  62                 IN PVOID DeferredContext,
  63                 IN PVOID SystemArgument1,
  64                 IN PVOID SystemArgument2)
  65 {
  66     HEADLESS_RSP_GET_BYTE ByteValue;
  67     ULONG ValueSize;
  68     BOOLEAN GotChar;
  69     NTSTATUS Status;
  70     PSAC_DEVICE_EXTENSION SacExtension;
  71
  72     /* Update our counter */
  73     _InterlockedExchangeAdd(&TimerDpcCount, 1);
  74
  75     /* Set defaults and loop for new characters */
  76     GotChar = FALSE;
  77     ValueSize = sizeof(ByteValue);
  78     do
  79     {
  80         /* Ask the kernel for a byte */
  81         Status = HeadlessDispatch(HeadlessCmdGetByte,
  82                                   NULL,
  83                                   0,
  84                                   &ByteValue,
  85                                   &ValueSize);
  86
  87         /* Break out if there's nothing interesting */
  88         if (!NT_SUCCESS(Status)) break;
  89         if (!ByteValue.Value) break;
  90
  91         /* Update the serial port buffer */
  92         SerialPortBuffer[SerialPortProducerIndex] = ByteValue.Value;
  93         GotChar = TRUE;
  94
  95         /* Update the index, let it roll-over if needed */
  96         _InterlockedExchange(&SerialPortProducerIndex,
  97                              (SerialPortProducerIndex + 1) &
  98                              (SAC_SERIAL_PORT_BUFFER_SIZE - 1));
  99     } while (ByteValue.Value);
 100
 101     /* Did we get anything */
 102     if (GotChar)
 103     {
 104         /* Signal the worker thread that there is work to do */
 105         SacExtension = DeferredContext;
 106         KeSetEvent(&SacExtension->Event, SacExtension->PriorityBoost, FALSE);
 107     }
 108 }
 109
 110 VOID
 111 NTAPI
 112 UnloadHandler(IN PDRIVER_OBJECT DriverObject)
 113 {
 114     PDEVICE_OBJECT DeviceObject, NextDevice;
 115     SAC_DBG(SAC_DBG_ENTRY_EXIT, "SAC UnloadHandler: Entering.\n");
 116
 117     /* Go overy ever device part of the driver */
 118     DeviceObject = DriverObject->DeviceObject;
 119     while (DeviceObject)
 120     {
 121         /* Free and delete the information about this device */
 122         NextDevice = DeviceObject->NextDevice;
 123         FreeDeviceData(DeviceObject);
 124         IoDeleteDevice(DeviceObject);
 125
 126         /* Move on to the next one */
 127         DeviceObject = NextDevice;
 128     }
 129
 130     /* Free the driver data and exit */
 131     FreeGlobalData();
 132     SAC_DBG(SAC_DBG_ENTRY_EXIT, "SAC UnloadHandler: Exiting.\n");
 133 }