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1 : : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : : /*************************************************************************
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19 : : * GNU Lesser General Public License version 3 for more details
20 : : * (a copy is included in the LICENSE file that accompanied this code).
21 : : *
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23 : : * version 3 along with OpenOffice.org. If not, see
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28 : : #ifndef _CPPUHELPER_WEAK_HXX_
29 : : #define _CPPUHELPER_WEAK_HXX_
30 : :
31 : : #include <osl/interlck.h>
32 : : #include <rtl/alloc.h>
33 : : #include <cppuhelper/weakref.hxx>
34 : : #include <cppuhelper/queryinterface.hxx>
35 : : #include <com/sun/star/uno/XWeak.hpp>
36 : : #include "cppuhelperdllapi.h"
37 : :
38 : :
39 : : namespace cppu
40 : : {
41 : :
42 : : class OWeakConnectionPoint;
43 : :
44 : : /** Base class to implement an UNO object supporting weak references, i.e. the object can be held
45 : : weakly (by a ::com::sun::star::uno::WeakReference).
46 : : This implementation copes with reference counting. Upon last release(), the virtual dtor
47 : : is called.
48 : :
49 : : @derive
50 : : Inherit from this class and delegate acquire()/ release() calls.
51 : : */
52 : : class CPPUHELPER_DLLPUBLIC OWeakObject : public ::com::sun::star::uno::XWeak
53 : : {
54 : : friend class OWeakConnectionPoint;
55 : :
56 : : protected:
57 : : /** Virtual dtor.
58 : :
59 : : @attention
60 : : Despite the fact that a RuntimeException is allowed to be thrown, you must not throw any
61 : : exception upon destruction!
62 : : */
63 : : virtual ~OWeakObject() SAL_THROW( (::com::sun::star::uno::RuntimeException) );
64 : :
65 : : /** disposes and resets m_pWeakConnectionPoint
66 : : @precond
67 : : m_refCount equals 0
68 : : */
69 : : void disposeWeakConnectionPoint();
70 : :
71 : : /** reference count.
72 : :
73 : : @attention
74 : : Don't modify manually! Use acquire() and release().
75 : : */
76 : : oslInterlockedCount m_refCount;
77 : :
78 : : /// @cond INTERNAL
79 : :
80 : : /** Container of all weak reference listeners and the connection point from the weak reference.
81 : : */
82 : : OWeakConnectionPoint * m_pWeakConnectionPoint;
83 : :
84 : : /** reserved for future use. do not use.
85 : : */
86 : : void * m_pReserved;
87 : :
88 : : /// @endcond
89 : :
90 : : public:
91 : : /// @cond INTERNAL
92 : : // these are here to force memory de/allocation to sal lib.
93 : 10054060 : inline static void * SAL_CALL operator new( size_t nSize ) SAL_THROW(())
94 : 10054060 : { return ::rtl_allocateMemory( nSize ); }
95 : 9972680 : inline static void SAL_CALL operator delete( void * pMem ) SAL_THROW(())
96 : 9972680 : { ::rtl_freeMemory( pMem ); }
97 : : inline static void * SAL_CALL operator new( size_t, void * pMem ) SAL_THROW(())
98 : : { return pMem; }
99 : : inline static void SAL_CALL operator delete( void *, void * ) SAL_THROW(())
100 : : {}
101 : : /// @endcond
102 : :
103 : : #ifdef _MSC_VER
104 : : /** Default Constructor. Sets the reference count to zero.
105 : : Accidentally occurs in msvc mapfile = > had to be outlined.
106 : : */
107 : : OWeakObject() SAL_THROW(());
108 : : #else
109 : : /** Default Constructor. Sets the reference count to zero.
110 : : */
111 : 11496521 : inline OWeakObject() SAL_THROW(())
112 : : : m_refCount( 0 )
113 : 11496521 : , m_pWeakConnectionPoint( 0 )
114 : 11496521 : {}
115 : : #endif
116 : : /** Dummy copy constructor. Set the reference count to zero.
117 : :
118 : : @param rObj dummy param
119 : : */
120 : 9 : inline OWeakObject( const OWeakObject & rObj ) SAL_THROW(())
121 : : : com::sun::star::uno::XWeak()
122 : : , m_refCount( 0 )
123 : 9 : , m_pWeakConnectionPoint( 0 )
124 : : {
125 : : (void) rObj;
126 : 9 : }
127 : : /** Dummy assignment operator. Does not affect reference count.
128 : :
129 : : @return this OWeakObject
130 : : */
131 : : inline OWeakObject & SAL_CALL operator = ( const OWeakObject &)
132 : : SAL_THROW(())
133 : : { return *this; }
134 : :
135 : : /** Basic queryInterface() implementation supporting \::com::sun::star::uno::XWeak and
136 : : \::com::sun::star::uno::XInterface.
137 : :
138 : : @param rType demanded type
139 : : @return demanded type or empty any
140 : : */
141 : : virtual ::com::sun::star::uno::Any SAL_CALL queryInterface(
142 : : const ::com::sun::star::uno::Type & rType )
143 : : throw (::com::sun::star::uno::RuntimeException);
144 : : /** increasing m_refCount
145 : : */
146 : : virtual void SAL_CALL acquire()
147 : : throw ();
148 : : /** decreasing m_refCount
149 : : */
150 : : virtual void SAL_CALL release()
151 : : throw ();
152 : :
153 : : /** XWeak::queryAdapter() implementation
154 : :
155 : : @return a \::com::sun::star::uno::XAdapter reference
156 : : */
157 : : virtual ::com::sun::star::uno::Reference< ::com::sun::star::uno::XAdapter > SAL_CALL queryAdapter()
158 : : throw (::com::sun::star::uno::RuntimeException);
159 : :
160 : : /** Cast operator to XInterface reference.
161 : :
162 : : @return XInterface reference
163 : : */
164 : 3701593 : inline SAL_CALL operator ::com::sun::star::uno::Reference< ::com::sun::star::uno::XInterface > () SAL_THROW(())
165 : 3701593 : { return this; }
166 : : };
167 : :
168 : : }
169 : :
170 : : #endif
171 : :
172 : :
173 : : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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