//  Copyright (c) Microsoft Corporation. All rights reserved.

#include <sdkddkver.h>

import "oaidl.idl";

cpp_quote("#if (NTDDI_VERSION >= NTDDI_WIN8)")


interface IFindReferenceTargetsCallback;
interface IReferenceTrackerManager;
interface IReferenceTrackerHost;


[
    object,
    uuid( 64bd43f8-bfee-4ec4-b7eb-2935158dae21 ),
    local,
    pointer_default(unique)
]
interface IReferenceTrackerTarget: IUnknown
{
    ULONG AddRefFromReferenceTracker();
    ULONG ReleaseFromReferenceTracker();

    HRESULT Peg( );
    HRESULT Unpeg( );
};


[
    object,
    uuid( 11d3b13a-180e-4789-a8be-7712882893e6 ),
    local,
    pointer_default(unique)
]
interface IReferenceTracker : IUnknown
{
    HRESULT ConnectFromTrackerSource();    
    HRESULT DisconnectFromTrackerSource();        
    HRESULT FindTrackerTargets( [in, annotation("_In_")] IFindReferenceTargetsCallback *callback );        

    HRESULT GetReferenceTrackerManager( [out, annotation("_Out_")] IReferenceTrackerManager **value );
    HRESULT AddRefFromTrackerSource();
    HRESULT ReleaseFromTrackerSource();   
    HRESULT PegFromTrackerSource();
};



[
    object,
    uuid( 3cf184b4-7ccb-4dda-8455-7e6ce99a3298 ),
    local,
    pointer_default(unique)
]
interface IReferenceTrackerManager : IUnknown
{
    HRESULT ReferenceTrackingStarted();
    HRESULT FindTrackerTargetsCompleted( [in, annotation("_In_")] boolean findFailed );
    HRESULT ReferenceTrackingCompleted();
    HRESULT SetReferenceTrackerHost([in, annotation("_In_")] IReferenceTrackerHost *value );
};




[
    object,
    uuid( 04b3486c-4687-4229-8d14-505ab584dd88 ),
    local,
    pointer_default(unique)
]
interface IFindReferenceTargetsCallback : IUnknown 
{   
   HRESULT FoundTrackerTarget( [in, annotation("_In_")] IReferenceTrackerTarget *target);
};    


typedef [v1_enum] enum
{
    XAML_REFERENCETRACKER_DISCONNECT_DEFAULT = 0,
    XAML_REFERENCETRACKER_DISCONNECT_SUSPEND = 1
} XAML_REFERENCETRACKER_DISCONNECT;



[
    object,
    uuid( 29a71c6a-3c42-4416-a39d-e2825a07a773 ),
    local,
    pointer_default(unique)
]
interface IReferenceTrackerHost : IUnknown
{
    HRESULT DisconnectUnusedReferenceSources([in] XAML_REFERENCETRACKER_DISCONNECT options );
    HRESULT ReleaseDisconnectedReferenceSources();
    HRESULT NotifyEndOfReferenceTrackingOnThread();

    HRESULT GetTrackerTarget(IUnknown *unknown, IReferenceTrackerTarget **newReference);

    HRESULT AddMemoryPressure( UINT64 bytesAllocated);
    HRESULT RemoveMemoryPressure(UINT64 bytesAllocated);
};

cpp_quote("#if (NTDDI_VERSION >= NTDDI_WIN10_RS2)")

[
    object,
    uuid( 4e897caa-59d5-4613-8f8c-f7ebd1f399b0 ),
    local,
    pointer_default(unique)
]
interface IReferenceTrackerExtension : IUnknown
{
	// When this interface is implemented by a subclass of Windows.UI.Xaml.DependencyObject,
	// it can participate in reference tracking.  Implementing this interface signals that the object
	// is the controlling unknown, and returns the actual COM ref count from it's Release() method.
};

typedef struct TrackerHandle__ {
    int unused;
} TrackerHandle__;

typedef [unique] TrackerHandle__* TrackerHandle;

[
    object,
    uuid( eb24c20b-9816-4ac7-8cff-36f67a118f4e ),
    local,
    pointer_default(unique)
]
interface ITrackerOwner: IUnknown
{
    HRESULT CreateTrackerHandle([out, retval] TrackerHandle* returnValue);
    HRESULT DeleteTrackerHandle([in] TrackerHandle handle);
    HRESULT SetTrackerValue([in] TrackerHandle handle, [in] IUnknown* value);
    boolean TryGetSafeTrackerValue([in] TrackerHandle handle, [out, retval] IUnknown** returnValue);
};

cpp_quote("#endif // NTDDI_VERSION >= NTDDI_WIN10_RS2")


cpp_quote("#endif // NTDDI_VERSION >= NTDDI_WIN8")