vss-common.h (3177B)
1 /* 2 * QEMU Guest Agent win32 VSS common declarations 3 * 4 * Copyright Hitachi Data Systems Corp. 2013 5 * 6 * Authors: 7 * Tomoki Sekiyama <tomoki.sekiyama@hds.com> 8 * 9 * This work is licensed under the terms of the GNU GPL, version 2 or later. 10 * See the COPYING file in the top-level directory. 11 */ 12 13 #ifndef VSS_COMMON_H 14 #define VSS_COMMON_H 15 16 #define __MIDL_user_allocate_free_DEFINED__ 17 #include <windows.h> 18 #include <shlwapi.h> 19 20 /* Reduce warnings to include vss.h */ 21 22 /* Ignore annotations for MS IDE */ 23 #define __in IN 24 #define __out OUT 25 #define __RPC_unique_pointer 26 #define __RPC_string 27 #define __RPC__deref_inout_opt 28 #define __RPC__out 29 #ifndef __RPC__out_ecount_part 30 #define __RPC__out_ecount_part(x, y) 31 #endif 32 #define _declspec(x) 33 #undef uuid 34 #define uuid(x) 35 36 /* Undef some duplicated error codes redefined in vss.h */ 37 #undef VSS_E_BAD_STATE 38 #undef VSS_E_PROVIDER_NOT_REGISTERED 39 #undef VSS_E_PROVIDER_VETO 40 #undef VSS_E_OBJECT_NOT_FOUND 41 #undef VSS_E_VOLUME_NOT_SUPPORTED 42 #undef VSS_E_VOLUME_NOT_SUPPORTED_BY_PROVIDER 43 #undef VSS_E_OBJECT_ALREADY_EXISTS 44 #undef VSS_E_UNEXPECTED_PROVIDER_ERROR 45 #undef VSS_E_INVALID_XML_DOCUMENT 46 #undef VSS_E_MAXIMUM_NUMBER_OF_VOLUMES_REACHED 47 #undef VSS_E_MAXIMUM_NUMBER_OF_SNAPSHOTS_REACHED 48 49 #include <vss.h> 50 #include "vss-handles.h" 51 52 /* Macros to convert char definitions to wchar */ 53 #define _L(a) L##a 54 #define L(a) _L(a) 55 56 const GUID g_gProviderId = { 0x3629d4ed, 0xee09, 0x4e0e, 57 {0x9a, 0x5c, 0x6d, 0x8b, 0xa2, 0x87, 0x2a, 0xef} }; 58 const GUID g_gProviderVersion = { 0x11ef8b15, 0xcac6, 0x40d6, 59 {0x8d, 0x5c, 0x8f, 0xfc, 0x16, 0x3f, 0x24, 0xca} }; 60 61 const CLSID CLSID_QGAVSSProvider = { 0x6e6a3492, 0x8d4d, 0x440c, 62 {0x96, 0x19, 0x5e, 0x5d, 0x0c, 0xc3, 0x1c, 0xa8} }; 63 64 const TCHAR g_szClsid[] = TEXT("{6E6A3492-8D4D-440C-9619-5E5D0CC31CA8}"); 65 const TCHAR g_szProgid[] = TEXT("QGAVSSProvider"); 66 67 #ifdef HAVE_VSS_SDK 68 /* Enums undefined in VSS SDK 7.2 but defined in newer Windows SDK */ 69 enum __VSS_VOLUME_SNAPSHOT_ATTRIBUTES { 70 VSS_VOLSNAP_ATTR_NO_AUTORECOVERY = 0x00000002, 71 VSS_VOLSNAP_ATTR_TXF_RECOVERY = 0x02000000 72 }; 73 #endif 74 75 /* COM pointer utility; call ->Release() when it goes out of scope */ 76 template <class T> 77 class COMPointer { 78 COMPointer(const COMPointer<T> &p) { } /* no copy */ 79 T *p; 80 public: 81 COMPointer &operator=(T *new_p) 82 { 83 /* Assignment of a new T* (or NULL) causes release of previous p */ 84 if (p && p != new_p) { 85 p->Release(); 86 } 87 p = new_p; 88 return *this; 89 } 90 /* Replace by assignment to the pointer of p */ 91 T **replace(void) 92 { 93 *this = NULL; 94 return &p; 95 } 96 /* Make COMPointer be used like T* */ 97 operator T*() { return p; } 98 T *operator->(void) { return p; } 99 T &operator*(void) { return *p; } 100 operator bool() { return !!p; } 101 102 COMPointer(T *p = NULL) : p(p) { } 103 ~COMPointer() { *this = NULL; } /* Automatic release */ 104 }; 105 106 /* 107 * COM initializer; this should declared before COMPointer to uninitialize COM 108 * after releasing COM objects. 109 */ 110 class COMInitializer { 111 public: 112 COMInitializer() { CoInitialize(NULL); } 113 ~COMInitializer() { CoUninitialize(); } 114 }; 115 116 #endif