141 lines
2.5 KiB
C
141 lines
2.5 KiB
C
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/*++
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Copyright (c) 1990, 1991, 1992, 1993 Microsoft Corporation
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Module Name:
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kbdclass.h
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Abstract:
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These are the structures and defines that are used in the
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keyboard class driver.
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Revision History:
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--*/
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#ifndef _KBDCLASS_
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#define _KBDCLASS_
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#include <ntddkbd.h>
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//
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// Define the default number of elements in the class input data queue.
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//
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#define DATA_QUEUE_SIZE 100
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//
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// Class device extension.
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//
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typedef struct _DEVICE_EXTENSION {
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//
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// Flag that indicates whether there is currently a request held pending
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// by StartIo.
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//
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BOOLEAN RequestIsPending;
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//
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// Flag that indicates whether the cleanup routine has been initiated.
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//
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BOOLEAN CleanupWasInitiated;
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//
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// Flag that indicates whether or not a trusted subsystem currently
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// has a handle open.
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//
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BOOLEAN TrustedSubsystemConnected;
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//
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// Number of input data items currently in the InputData queue.
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//
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ULONG InputCount;
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//
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// Start of the class input data queue (really a circular buffer).
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//
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PKEYBOARD_INPUT_DATA InputData;
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//
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// Insertion pointer for InputData.
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//
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PKEYBOARD_INPUT_DATA DataIn;
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//
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// Removal pointer for InputData.
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//
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PKEYBOARD_INPUT_DATA DataOut;
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//
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// Keyboard attributes.
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//
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KEYBOARD_ATTRIBUTES KeyboardAttributes;
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//
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// Spinlock used to synchronize access to the input data queue and its
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// insertion/removal pointers.
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//
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KSPIN_LOCK SpinLock;
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//
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// Number of port drivers serviced by this class driver.
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//
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ULONG MaximumPortsServiced;
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//
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// Specifies the type of class-port connection to make. A '1'
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// indicates a 1:1 relationship between class device objects and
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// port device objects. A '0' indicates a 1:many relationship.
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//
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ULONG ConnectOneClassToOnePort;
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//
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// Pointer to the list of pointers to port device objects.
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//
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PDEVICE_OBJECT *PortDeviceObjectList;
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//
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// Request sequence number (used for error logging).
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//
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ULONG SequenceNumber;
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//
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// Indicates whether it is okay to log overflow errors.
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//
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BOOLEAN OkayToLogOverflow;
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} DEVICE_EXTENSION, *PDEVICE_EXTENSION;
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//
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// Keyboard configuration information.
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//
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typedef struct _KEYBOARD_CONFIGURATION_INFORMATION {
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//
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// Maximum size of class input data queue, in bytes.
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//
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ULONG DataQueueSize;
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} KEYBOARD_CONFIGURATION_INFORMATION, *PKEYBOARD_CONFIGURATION_INFORMATION;
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#endif // _KBDCLASS_
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