xref: /reactos/drivers/sac/driver/dispatch.c (revision 527f2f90) 
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 }
134