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/*

 * QEMU Guest Agent win32 VSS common declarations

 *

 * Copyright Hitachi Data Systems Corp. 2013

 *

 * Authors:

 *  Tomoki Sekiyama   <tomoki.sekiyama@hds.com>

 *

 * This work is licensed under the terms of the GNU GPL, version 2 or later.

 * See the COPYING file in the top-level directory.

 */

#ifndef VSS_WIN32_H

#define VSS_WIN32_H

#define __MIDL_user_allocate_free_DEFINED__

#include "config-host.h"

#include <windows.h>

#include <shlwapi.h>

/* Reduce warnings to include vss.h */

/* Ignore annotations for MS IDE */

#define __in  IN

#define __out OUT

#define __RPC_unique_pointer

#define __RPC_string

#define __RPC__deref_inout_opt

#define __RPC__out

#ifndef __RPC__out_ecount_part

#define __RPC__out_ecount_part(x, y)

#endif

#define _declspec(x)

#undef uuid

#define uuid(x)

/* Undef some duplicated error codes redefined in vss.h */

#undef VSS_E_BAD_STATE

#undef VSS_E_PROVIDER_NOT_REGISTERED

#undef VSS_E_PROVIDER_VETO

#undef VSS_E_OBJECT_NOT_FOUND

#undef VSS_E_VOLUME_NOT_SUPPORTED

#undef VSS_E_VOLUME_NOT_SUPPORTED_BY_PROVIDER

#undef VSS_E_OBJECT_ALREADY_EXISTS

#undef VSS_E_UNEXPECTED_PROVIDER_ERROR

#undef VSS_E_INVALID_XML_DOCUMENT

#undef VSS_E_MAXIMUM_NUMBER_OF_VOLUMES_REACHED

#undef VSS_E_MAXIMUM_NUMBER_OF_SNAPSHOTS_REACHED

/*

 * VSS headers must be installed from Microsoft VSS SDK 7.2 available at:

 * http://www.microsoft.com/en-us/download/details.aspx?id=23490

 */

#include "inc/win2003/vss.h"

/* Macros to convert char definitions to wchar */

#define _L(a) L##a

#define L(a) _L(a)

/* Constants for QGA VSS Provider */

#define QGA_PROVIDER_NAME "QEMU Guest Agent VSS Provider"

#define QGA_PROVIDER_LNAME L(QGA_PROVIDER_NAME)

#define QGA_PROVIDER_VERSION L(QEMU_VERSION)

#define EVENT_NAME_FROZEN  "Global\\QGAVSSEvent-frozen"

#define EVENT_NAME_THAW    "Global\\QGAVSSEvent-thaw"

#define EVENT_NAME_TIMEOUT "Global\\QGAVSSEvent-timeout"

const GUID g_gProviderId = { 0x3629d4ed, 0xee09, 0x4e0e,

    {0x9a, 0x5c, 0x6d, 0x8b, 0xa2, 0x87, 0x2a, 0xef} };

const GUID g_gProviderVersion = { 0x11ef8b15, 0xcac6, 0x40d6,

    {0x8d, 0x5c, 0x8f, 0xfc, 0x16, 0x3f, 0x24, 0xca} };

const CLSID CLSID_QGAVSSProvider = { 0x6e6a3492, 0x8d4d, 0x440c,

    {0x96, 0x19, 0x5e, 0x5d, 0x0c, 0xc3, 0x1c, 0xa8} };

const TCHAR g_szClsid[] = TEXT("{6E6A3492-8D4D-440C-9619-5E5D0CC31CA8}");

const TCHAR g_szProgid[] = TEXT("QGAVSSProvider");

/* Enums undefined in VSS SDK 7.2 but defined in newer Windows SDK */

enum __VSS_VOLUME_SNAPSHOT_ATTRIBUTES {

    VSS_VOLSNAP_ATTR_NO_AUTORECOVERY       = 0x00000002,

    VSS_VOLSNAP_ATTR_TXF_RECOVERY          = 0x02000000

};

/* COM pointer utility; call ->Release() when it goes out of scope */

template <class T>

class COMPointer {

    COMPointer(const COMPointer<T> &p) { } /* no copy */

    T *p;

public:

    COMPointer &operator=(T *new_p)

    {

        /* Assignment of a new T* (or NULL) causes release of previous p */

        if (p && p != new_p) {

            p->Release();

        }

        p = new_p;

        return *this;

    }

    /* Replace by assignment to the pointer of p  */

    T **replace(void)

    {

        *this = NULL;

        return &p;

    }

    /* Make COMPointer be used like T* */

    operator T*() { return p; }

    T *operator->(void) { return p; }

    T &operator*(void) { return *p; }

    operator bool() { return !!p; }

    COMPointer(T *p = NULL) : p(p) { }

    ~COMPointer() { *this = NULL; }  /* Automatic release */

};

/*

 * COM initializer; this should declared before COMPointer to uninitialize COM

 * after releasing COM objects.

 */

class COMInitializer {

public:

    COMInitializer() { CoInitialize(NULL); }

    ~COMInitializer() { CoUninitialize(); }

};

#endif