[WDF] Add Windows Driver Framework files

Takern from Microsoft GitHub repo:
d9c6040fe9

Licensed under MIT

sdk/lib/drivers/wdf/shared/inc/private/common/fxpoxinterface.hpp

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+//
+//    Copyright (C) Microsoft.  All rights reserved.
+//
+#ifndef _FXPOXINTERFACE_H_
+#define _FXPOXINTERFACE_H_
+
+#include "FxDevicePwrReqStateMachine.hpp"
+
+class FxPoxInterface {
+
+friend class FxDevicePwrRequirementMachine;
+
+public:
+    FxPoxInterface(
+        __in FxPkgPnp* PkgPnp
+        );
+
+    ~FxPoxInterface(
+        VOID
+        );
+
+    NTSTATUS
+    CreateDevicePowerRequirementMachine(
+        VOID
+        );
+
+    NTSTATUS
+    NotifyDevicePowerDown(
+        VOID
+        );
+
+
+    VOID
+    DeviceIsPoweredOn(
+        VOID
+        );
+
+    FxPkgPnp*
+    PkgPnp(
+        VOID
+        )
+    {
+        return m_PkgPnp;
+    }
+
+    POHANDLE
+    GetPoHandle(
+        VOID
+        )
+    {
+        return m_PoHandle;
+    }
+
+    NTSTATUS
+    InitializeComponents(
+        VOID
+        );
+
+    VOID
+    UninitializeComponents(
+        VOID
+        );
+
+    VOID
+    RequestComponentActive(
+        VOID
+        );
+
+    BOOLEAN
+    DeclareComponentIdle(
+        VOID
+        );
+
+    VOID
+    UpdateIdleTimeoutHint(
+        VOID
+        );
+
+    VOID
+    SimulateDevicePowerRequired(
+        VOID
+        );
+
+    VOID
+    SimulateDevicePowerNotRequired(
+        VOID
+        );
+
+    VOID
+    PoxReportDevicePoweredOn(
+        VOID
+        );
+
+    VOID
+    PowerRequiredCallbackInvoked(
+        VOID
+        );
+
+    VOID
+    PowerNotRequiredCallbackInvoked(
+        VOID
+        );
+
+private:
+
+    NTSTATUS
+    PoxRegisterDevice(
+        VOID
+        );
+
+    VOID
+    DprProcessEventFromPoxCallback(
+        __in FxDevicePwrRequirementEvents Event
+        );
+
+    struct _POX_SETTINGS *
+    GetPowerFrameworkSettings(
+        VOID
+        );
+
+    VOID
+    PowerRequiredCallbackWorker(
+        __in BOOLEAN InvokedFromPoxCallback
+        );
+
+    VOID
+    PowerNotRequiredCallbackWorker(
+        __in BOOLEAN InvokedFromPoxCallback
+        );
+
+    VOID
+    PoxStartDevicePowerManagement(
+        VOID
+        );
+
+
+    VOID
+    PoxUnregisterDevice(
+        VOID
+        );
+
+    VOID
+    PoxActivateComponent(
+        VOID
+        );
+
+    VOID
+    PoxIdleComponent(
+        VOID
+        );
+
+    VOID
+    PoxSetDeviceIdleTimeout(
+        __in ULONGLONG IdleTimeout
+        );
+
+    static PO_FX_COMPONENT_IDLE_STATE_CALLBACK StateCallback;
+    static PO_FX_COMPONENT_ACTIVE_CONDITION_CALLBACK ComponentActiveCallback;
+    static PO_FX_COMPONENT_IDLE_CONDITION_CALLBACK ComponentIdleCallback;
+    static PO_FX_DEVICE_POWER_REQUIRED_CALLBACK PowerRequiredCallback;
+    static PO_FX_DEVICE_POWER_NOT_REQUIRED_CALLBACK PowerNotRequiredCallback;
+    static PO_FX_POWER_CONTROL_CALLBACK PowerControlCallback;
+
+public:
+    //
+    // Device power requirement state machine
+    //
+    FxDevicePwrRequirementMachine * m_DevicePowerRequirementMachine;
+
+    //
+    // Idle timeout hint to be provided to power framework at the next
+    // opportunity, i.e. a pending update to the idle timeout hint.
+    //
+    ULONG m_NextIdleTimeoutHint;
+
+private:
+    FxPkgPnp* m_PkgPnp;
+
+    //
+    // Handle obtained upon registration with power manager
+    //
+    POHANDLE m_PoHandle;
+
+    //
+    // Variable that tracks whether device power is required and the lock that
+    // protects this variable
+    //
+    BOOLEAN m_DevicePowerRequired;
+    MxLock m_DevicePowerRequiredLock;
+
+    //
+    // Idle timeout hint currently provided to power framework.
+    //
+    ULONG m_CurrentIdleTimeoutHint;
+};
+
+#endif // _FXPOXINTERFACE_H_