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1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : /*
3 : * This file is part of the LibreOffice project.
4 : *
5 : * This Source Code Form is subject to the terms of the Mozilla Public
6 : * License, v. 2.0. If a copy of the MPL was not distributed with this
7 : * file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 : *
9 : * This file incorporates work covered by the following license notice:
10 : *
11 : * Licensed to the Apache Software Foundation (ASF) under one or more
12 : * contributor license agreements. See the NOTICE file distributed
13 : * with this work for additional information regarding copyright
14 : * ownership. The ASF licenses this file to you under the Apache
15 : * License, Version 2.0 (the "License"); you may not use this file
16 : * except in compliance with the License. You may obtain a copy of
17 : * the License at http://www.apache.org/licenses/LICENSE-2.0 .
18 : */
19 : #ifndef _CPPUHELPER_WEAK_HXX_
20 : #define _CPPUHELPER_WEAK_HXX_
21 :
22 : #include <osl/interlck.h>
23 : #include <rtl/alloc.h>
24 : #include <cppuhelper/weakref.hxx>
25 : #include <cppuhelper/queryinterface.hxx>
26 : #include <com/sun/star/uno/XWeak.hpp>
27 : #include "cppuhelperdllapi.h"
28 :
29 :
30 : namespace cppu
31 : {
32 :
33 : class OWeakConnectionPoint;
34 :
35 : /** Base class to implement an UNO object supporting weak references, i.e. the object can be held
36 : weakly (by a ::com::sun::star::uno::WeakReference).
37 : This implementation copes with reference counting. Upon last release(), the virtual dtor
38 : is called.
39 :
40 : @derive
41 : Inherit from this class and delegate acquire()/ release() calls.
42 : */
43 : class CPPUHELPER_DLLPUBLIC OWeakObject : public ::com::sun::star::uno::XWeak
44 : {
45 : friend class OWeakConnectionPoint;
46 :
47 : protected:
48 : /** Virtual dtor.
49 :
50 : @attention
51 : Despite the fact that a RuntimeException is allowed to be thrown, you must not throw any
52 : exception upon destruction!
53 : */
54 : virtual ~OWeakObject() SAL_THROW( (::com::sun::star::uno::RuntimeException) );
55 :
56 : /** disposes and resets m_pWeakConnectionPoint
57 : @precond
58 : m_refCount equals 0
59 : */
60 : void disposeWeakConnectionPoint();
61 :
62 : /** reference count.
63 :
64 : @attention
65 : Don't modify manually! Use acquire() and release().
66 : */
67 : oslInterlockedCount m_refCount;
68 :
69 : /// @cond INTERNAL
70 :
71 : /** Container of all weak reference listeners and the connection point from the weak reference.
72 : */
73 : OWeakConnectionPoint * m_pWeakConnectionPoint;
74 :
75 : /** reserved for future use. do not use.
76 : */
77 : void * m_pReserved;
78 :
79 : /// @endcond
80 :
81 : public:
82 : /// @cond INTERNAL
83 : // these are here to force memory de/allocation to sal lib.
84 2548374 : inline static void * SAL_CALL operator new( size_t nSize ) SAL_THROW(())
85 2548374 : { return ::rtl_allocateMemory( nSize ); }
86 2453352 : inline static void SAL_CALL operator delete( void * pMem ) SAL_THROW(())
87 2453352 : { ::rtl_freeMemory( pMem ); }
88 : inline static void * SAL_CALL operator new( size_t, void * pMem ) SAL_THROW(())
89 : { return pMem; }
90 : inline static void SAL_CALL operator delete( void *, void * ) SAL_THROW(())
91 : {}
92 : /// @endcond
93 :
94 : #ifdef _MSC_VER
95 : /** Default Constructor. Sets the reference count to zero.
96 : Accidentally occurs in msvc mapfile = > had to be outlined.
97 : */
98 : OWeakObject() SAL_THROW(());
99 : #else
100 : /** Default Constructor. Sets the reference count to zero.
101 : */
102 2629524 : inline OWeakObject() SAL_THROW(())
103 : : m_refCount( 0 )
104 2629524 : , m_pWeakConnectionPoint( 0 )
105 2629524 : {}
106 : #endif
107 : /** Dummy copy constructor. Set the reference count to zero.
108 :
109 : @param rObj dummy param
110 : */
111 6 : inline OWeakObject( const OWeakObject & rObj ) SAL_THROW(())
112 : : com::sun::star::uno::XWeak()
113 : , m_refCount( 0 )
114 6 : , m_pWeakConnectionPoint( 0 )
115 : {
116 : (void) rObj;
117 6 : }
118 : /** Dummy assignment operator. Does not affect reference count.
119 :
120 : @return this OWeakObject
121 : */
122 : inline OWeakObject & SAL_CALL operator = ( const OWeakObject &)
123 : SAL_THROW(())
124 : { return *this; }
125 :
126 : /** Basic queryInterface() implementation supporting \::com::sun::star::uno::XWeak and
127 : \::com::sun::star::uno::XInterface.
128 :
129 : @param rType demanded type
130 : @return demanded type or empty any
131 : */
132 : virtual ::com::sun::star::uno::Any SAL_CALL queryInterface(
133 : const ::com::sun::star::uno::Type & rType )
134 : throw (::com::sun::star::uno::RuntimeException);
135 : /** increasing m_refCount
136 : */
137 : virtual void SAL_CALL acquire()
138 : throw ();
139 : /** decreasing m_refCount
140 : */
141 : virtual void SAL_CALL release()
142 : throw ();
143 :
144 : /** XWeak::queryAdapter() implementation
145 :
146 : @return a \::com::sun::star::uno::XAdapter reference
147 : */
148 : virtual ::com::sun::star::uno::Reference< ::com::sun::star::uno::XAdapter > SAL_CALL queryAdapter()
149 : throw (::com::sun::star::uno::RuntimeException);
150 :
151 : /** Cast operator to XInterface reference.
152 :
153 : @return XInterface reference
154 : */
155 622223 : inline SAL_CALL operator ::com::sun::star::uno::Reference< ::com::sun::star::uno::XInterface > () SAL_THROW(())
156 622223 : { return this; }
157 : };
158 :
159 : }
160 :
161 : #endif
162 :
163 :
164 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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