[33963] | 1 | /* $Id: listeners.h 101967 2023-11-08 12:44:46Z vboxsync $ */
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| 2 | /** @file
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[58110] | 3 | * MS COM / XPCOM Abstraction Layer - Listener helpers.
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[33963] | 4 | */
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| 5 |
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| 6 | /*
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[98103] | 7 | * Copyright (C) 2010-2023 Oracle and/or its affiliates.
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[33963] | 8 | *
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[96407] | 9 | * This file is part of VirtualBox base platform packages, as
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| 10 | * available from https://www.virtualbox.org.
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[33963] | 11 | *
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[96407] | 12 | * This program is free software; you can redistribute it and/or
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| 13 | * modify it under the terms of the GNU General Public License
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| 14 | * as published by the Free Software Foundation, in version 3 of the
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| 15 | * License.
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| 16 | *
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| 17 | * This program is distributed in the hope that it will be useful, but
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| 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 20 | * General Public License for more details.
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| 21 | *
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| 22 | * You should have received a copy of the GNU General Public License
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| 23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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| 24 | *
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[33963] | 25 | * The contents of this file may alternatively be used under the terms
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| 26 | * of the Common Development and Distribution License Version 1.0
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[96407] | 27 | * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
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| 28 | * in the VirtualBox distribution, in which case the provisions of the
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[33963] | 29 | * CDDL are applicable instead of those of the GPL.
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| 30 | *
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| 31 | * You may elect to license modified versions of this file under the
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| 32 | * terms and conditions of either the GPL or the CDDL or both.
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[96407] | 33 | *
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| 34 | * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
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[33963] | 35 | */
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| 36 |
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[76558] | 37 | #ifndef VBOX_INCLUDED_com_listeners_h
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| 38 | #define VBOX_INCLUDED_com_listeners_h
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[76507] | 39 | #ifndef RT_WITHOUT_PRAGMA_ONCE
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| 40 | # pragma once
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| 41 | #endif
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[36536] | 42 |
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[33963] | 43 | #include <VBox/com/com.h>
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[36536] | 44 | #include <VBox/com/VirtualBox.h>
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[33963] | 45 |
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[58110] | 46 |
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| 47 | /** @defgroup grp_com_listeners Listener Helpers
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| 48 | * @ingroup grp_com
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| 49 | * @{
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| 50 | */
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| 51 |
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| 52 |
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[33963] | 53 | #ifdef VBOX_WITH_XPCOM
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[36536] | 54 | # define NS_IMPL_QUERY_HEAD_INLINE() \
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| 55 | NS_IMETHODIMP QueryInterface(REFNSIID aIID, void **aInstancePtr) \
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| 56 | { \
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| 57 | NS_ASSERTION(aInstancePtr, "QueryInterface requires a non-NULL destination!"); \
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| 58 | nsISupports *foundInterface;
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| 59 |
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| 60 | # define NS_INTERFACE_MAP_BEGIN_INLINE() NS_IMPL_QUERY_HEAD_INLINE()
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| 61 |
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| 62 | # define NS_IMPL_QUERY_INTERFACE1_INLINE(a_i1) \
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| 63 | NS_INTERFACE_MAP_BEGIN_INLINE() \
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| 64 | NS_INTERFACE_MAP_ENTRY(a_i1) \
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| 65 | NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, a_i1) \
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| 66 | NS_INTERFACE_MAP_END
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[33963] | 67 | #endif
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| 68 |
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[36536] | 69 | template <class T, class TParam = void *>
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[35724] | 70 | class ListenerImpl :
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[60701] | 71 | public ATL::CComObjectRootEx<ATL::CComMultiThreadModel>,
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[35722] | 72 | VBOX_SCRIPTABLE_IMPL(IEventListener)
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[33963] | 73 | {
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[60701] | 74 | T* mListener;
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[33963] | 75 |
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[35722] | 76 | #ifdef RT_OS_WINDOWS
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| 77 | /* FTM stuff */
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[60701] | 78 | ComPtr<IUnknown> m_pUnkMarshaler;
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[35724] | 79 | #else
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| 80 | nsAutoRefCnt mRefCnt;
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| 81 | NS_DECL_OWNINGTHREAD
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[35722] | 82 | #endif
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[33963] | 83 |
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| 84 | public:
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[35722] | 85 | ListenerImpl()
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[33963] | 86 | {
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[35724] | 87 | }
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[35722] | 88 |
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| 89 | virtual ~ListenerImpl()
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| 90 | {
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[33963] | 91 | }
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| 92 |
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[35722] | 93 | HRESULT init(T* aListener, TParam param)
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[33963] | 94 | {
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[35724] | 95 | mListener = aListener;
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[35722] | 96 | return mListener->init(param);
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[33963] | 97 | }
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| 98 |
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[35722] | 99 | HRESULT init(T* aListener)
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[33976] | 100 | {
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[35722] | 101 | mListener = aListener;
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| 102 | return mListener->init();
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[33976] | 103 | }
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[33963] | 104 |
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[35722] | 105 | void uninit()
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| 106 | {
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| 107 | if (mListener)
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| 108 | {
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| 109 | mListener->uninit();
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| 110 | delete mListener;
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| 111 | mListener = 0;
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| 112 | }
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| 113 | }
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[33963] | 114 |
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[35722] | 115 | HRESULT FinalConstruct()
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| 116 | {
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[33963] | 117 | #ifdef RT_OS_WINDOWS
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[60701] | 118 | return CoCreateFreeThreadedMarshaler(this, &m_pUnkMarshaler.m_p);
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[33963] | 119 | #else
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[35722] | 120 | return S_OK;
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[33963] | 121 | #endif
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| 122 | }
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| 123 |
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[35722] | 124 | void FinalRelease()
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| 125 | {
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| 126 | uninit();
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[33963] | 127 | #ifdef RT_OS_WINDOWS
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[60701] | 128 | m_pUnkMarshaler.setNull();
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[33963] | 129 | #endif
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[35722] | 130 | }
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| 131 |
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| 132 | T* getWrapped()
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[33963] | 133 | {
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[35722] | 134 | return mListener;
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[33963] | 135 | }
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| 136 |
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[35722] | 137 | DECLARE_NOT_AGGREGATABLE(ListenerImpl)
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[33963] | 138 |
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[35722] | 139 | DECLARE_PROTECT_FINAL_CONSTRUCT()
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| 140 |
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[35724] | 141 | #ifdef RT_OS_WINDOWS
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[35722] | 142 | BEGIN_COM_MAP(ListenerImpl)
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[35724] | 143 | COM_INTERFACE_ENTRY(IEventListener)
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[35722] | 144 | COM_INTERFACE_ENTRY2(IDispatch, IEventListener)
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[60701] | 145 | COM_INTERFACE_ENTRY_AGGREGATE(IID_IMarshal, m_pUnkMarshaler.m_p)
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[35722] | 146 | END_COM_MAP()
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[35724] | 147 | #else
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| 148 | NS_IMETHOD_(nsrefcnt) AddRef(void)
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| 149 | {
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| 150 | NS_PRECONDITION(PRInt32(mRefCnt) >= 0, "illegal refcnt");
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| 151 | nsrefcnt count;
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[101967] | 152 | count = ASMAtomicIncU32((volatile uint32_t *)&mRefCnt);
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[35724] | 153 | NS_LOG_ADDREF(this, count, "ListenerImpl", sizeof(*this));
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| 154 | return count;
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| 155 | }
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[35722] | 156 |
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[35724] | 157 | NS_IMETHOD_(nsrefcnt) Release(void)
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| 158 | {
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| 159 | nsrefcnt count;
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| 160 | NS_PRECONDITION(0 != mRefCnt, "dup release");
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[101967] | 161 | count = ASMAtomicDecU32((volatile uint32_t *)&mRefCnt);
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[35724] | 162 | NS_LOG_RELEASE(this, count, "ListenerImpl");
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| 163 | if (0 == count) {
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| 164 | mRefCnt = 1; /* stabilize */
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| 165 | /* enable this to find non-threadsafe destructors: */
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| 166 | /* NS_ASSERT_OWNINGTHREAD(_class); */
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| 167 | NS_DELETEXPCOM(this);
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| 168 | return 0;
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| 169 | }
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| 170 | return count;
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| 171 | }
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[35722] | 172 |
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[35724] | 173 | NS_IMPL_QUERY_INTERFACE1_INLINE(IEventListener)
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| 174 | #endif
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| 175 |
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| 176 |
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[33963] | 177 | STDMETHOD(HandleEvent)(IEvent * aEvent)
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| 178 | {
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| 179 | VBoxEventType_T aType = VBoxEventType_Invalid;
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[90770] | 180 | HRESULT hrc = aEvent->COMGETTER(Type)(&aType);
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| 181 | AssertMsg(SUCCEEDED(hrc), ("hrc=%Rhrc\n", hrc)); RT_NOREF(hrc);
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[35722] | 182 | return mListener->HandleEvent(aType, aEvent);
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[33963] | 183 | }
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| 184 | };
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| 185 |
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| 186 | #ifdef VBOX_WITH_XPCOM
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[36536] | 187 | # define VBOX_LISTENER_DECLARE(klazz) NS_DECL_CLASSINFO(klazz)
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[33963] | 188 | #else
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[36536] | 189 | # define VBOX_LISTENER_DECLARE(klazz)
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[33963] | 190 | #endif
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| 191 |
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[58110] | 192 | /** @} */
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[76585] | 193 | #endif /* !VBOX_INCLUDED_com_listeners_h */
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[45125] | 194 |
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