windows-server-2003/drivers/serveravailability/saport/watchdog.h

/*++

Copyright (c) 1991 - 2001 Microsoft Corporation

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Abstract:

    This header file contains all the global
    definitions for the watchdog timer device.

Author:

    Wesley Witt (wesw) 1-Oct-2001

Environment:

    Kernel mode only.

Notes:


--*/


#define WATCHDOG_PING_SECONDS   (30)
#define WATCHDOG_TIMER_VALUE    (120)
#define WATCHDOG_INIT_SECONDS   (10)

typedef struct _WATCHDOG_DEVICE_EXTENSION : _DEVICE_EXTENSION {
    FAST_MUTEX      DeviceLock;
    LONG            ActiveProcessCount;
    LARGE_INTEGER   LastProcessTime;
    KEVENT          PingEvent;
    KEVENT          StopEvent;
} WATCHDOG_DEVICE_EXTENSION, *PWATCHDOG_DEVICE_EXTENSION;

typedef struct _WATCHDOG_PROCESS_WATCH {
    PWATCHDOG_DEVICE_EXTENSION  DeviceExtension;
    HANDLE                      ProcessId;
} WATCHDOG_PROCESS_WATCH, *PWATCHDOG_PROCESS_WATCH;


NTSTATUS
SaWatchdogIoValidation(
    IN PWATCHDOG_DEVICE_EXTENSION DeviceExtension,
    IN PIRP Irp,
    PIO_STACK_LOCATION IrpSp
    );

NTSTATUS
SaWatchdogDeviceInitialization(
    IN PSAPORT_DRIVER_EXTENSION DriverExtension
    );

NTSTATUS
SaWatchdogShutdownNotification(
    IN PWATCHDOG_DEVICE_EXTENSION DeviceExtension,
    IN PIRP Irp,
    PIO_STACK_LOCATION IrpSp
    );

NTSTATUS
SaWatchdogStartDevice(
    IN PWATCHDOG_DEVICE_EXTENSION DeviceExtension
    );