| 1 | /* $Id: iunknown.cpp,v 1.4 2000-09-17 10:31:05 davidr Exp $ */
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| 2 | /*
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| 3 | *
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| 4 | * Project Odin Software License can be found in LICENSE.TXT
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| 5 | *
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| 6 | */
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| 7 | /*
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| 8 | * ClassID Manipulation.
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| 9 | *
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| 10 | * 18/7/99
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| 11 | *
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| 12 | * Copyright 1999 David J. Raison
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| 13 | *
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| 14 | * Some portions from Wine Implementation
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| 15 | * Copyright 1997 Marcus Meissner
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| 16 | */
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| 17 |
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| 18 | #include "ole32.h"
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| 19 |
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| 20 | #include "oString.h"
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| 21 |
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| 22 | // ======================================================================
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| 23 | // Local Data
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| 24 | // ======================================================================
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| 25 |
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| 26 | typedef struct
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| 27 | {
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| 28 | ICOM_VTABLE(IUnknown)* lpvtbl;
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| 29 | DWORD ref;
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| 30 | } IUnknownImpl;
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| 31 |
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| 32 | static ULONG WIN32API IUnknownImpl_AddRef(LPUNKNOWN iface);
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| 33 | static ULONG WIN32API IUnknownImpl_Release(LPUNKNOWN iface);
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| 34 | static HRESULT WIN32API IUnknownImpl_QueryInterface(LPUNKNOWN iface,
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| 35 | REFIID riid, LPVOID * ppvObject);
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| 36 |
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| 37 | static ICOM_VTABLE(IUnknown) IUnknownVt =
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| 38 | {
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| 39 | IUnknownImpl_QueryInterface,
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| 40 | IUnknownImpl_AddRef,
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| 41 | IUnknownImpl_Release
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| 42 | };
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| 43 |
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| 44 | // ======================================================================
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| 45 | // Local Methods
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| 46 | // ======================================================================
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| 47 |
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| 48 | // ----------------------------------------------------------------------
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| 49 | // IUnknownImpl_AddRef
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| 50 | // ----------------------------------------------------------------------
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| 51 | static ULONG WIN32API IUnknownImpl_AddRef(LPUNKNOWN iface)
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| 52 | {
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| 53 | ICOM_THIS(IUnknownImpl, iface);
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| 54 |
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| 55 | dprintf(("OLE32: IUnknown(%p)->AddRef()", This));
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| 56 |
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| 57 | return ++(This->ref);
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| 58 | }
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| 59 |
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| 60 | // ----------------------------------------------------------------------
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| 61 | // IUnknownImpl_Release
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| 62 | // ----------------------------------------------------------------------
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| 63 | static ULONG WIN32API IUnknownImpl_Release(LPUNKNOWN iface)
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| 64 | {
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| 65 | ICOM_THIS(IUnknownImpl, iface);
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| 66 |
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| 67 | dprintf(("OLE32: IUnknown(%p)->Release()\n", This));
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| 68 |
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| 69 | if (--(This->ref) == 0)
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| 70 | {
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| 71 | HeapFree(GetProcessHeap(), 0, This);
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| 72 | return 0;
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| 73 | }
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| 74 | return This->ref;
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| 75 | }
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| 76 |
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| 77 | // ----------------------------------------------------------------------
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| 78 | // IUnknownImpl_QueryInterface
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| 79 | // ----------------------------------------------------------------------
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| 80 | static HRESULT WIN32API IUnknownImpl_QueryInterface(LPUNKNOWN iface, REFIID riid, LPVOID *ppvObject)
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| 81 | {
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| 82 | ICOM_THIS(IUnknownImpl, iface);
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| 83 |
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| 84 | #ifdef DEBUG
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| 85 | oStringA tRiid(riid);
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| 86 | dprintf(("OLE32: IUnknown(%p)->QueryInterface(%s)\n", This, (char *)tRiid));
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| 87 | #endif
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| 88 |
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| 89 | if (IsEqualIID(&IID_IUnknown, riid))
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| 90 | {
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| 91 | dprintf((" ->IUnknown"));
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| 92 | *ppvObject = &(This->lpvtbl);
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| 93 | }
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| 94 | else
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| 95 | {
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| 96 | dprintf((" ->E_NOINTERFACE"));
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| 97 | return E_NOINTERFACE;
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| 98 | }
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| 99 |
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| 100 | // Query Interface always increases the reference count by one...
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| 101 | IUnknownImpl_AddRef(iface);
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| 102 |
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| 103 | return S_OK;
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| 104 | }
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| 105 |
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| 106 | // ----------------------------------------------------------------------
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| 107 | // IUnknownImpl_Constructor
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| 108 | // ----------------------------------------------------------------------
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| 109 | LPUNKNOWN IUnknownImpl_Constructor()
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| 110 | {
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| 111 | IUnknownImpl * unk;
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| 112 |
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| 113 | unk = (IUnknownImpl*)HeapAlloc(GetProcessHeap(), 0, sizeof(IUnknownImpl));
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| 114 | unk->lpvtbl = &IUnknownVt;
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| 115 | unk->ref = 1;
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| 116 | return (LPUNKNOWN)unk;
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| 117 | }
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| 118 |
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| 119 |
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