xref: /trunk/main/store/source/object.hxx (revision 1a5fa39b)
1 /**************************************************************
2  *
3  * Licensed to the Apache Software Foundation (ASF) under one
4  * or more contributor license agreements.  See the NOTICE file
5  * distributed with this work for additional information
6  * regarding copyright ownership.  The ASF licenses this file
7  * to you under the Apache License, Version 2.0 (the
8  * "License"); you may not use this file except in compliance
9  * with the License.  You may obtain a copy of the License at
10  *
11  *   http://www.apache.org/licenses/LICENSE-2.0
12  *
13  * Unless required by applicable law or agreed to in writing,
14  * software distributed under the License is distributed on an
15  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16  * KIND, either express or implied.  See the License for the
17  * specific language governing permissions and limitations
18  * under the License.
19  *
20  *************************************************************/
21 
22 
23 
24 #ifndef _STORE_OBJECT_HXX_
25 #define _STORE_OBJECT_HXX_
26 
27 #ifndef _SAL_TYPES_H_
28 #include "sal/types.h"
29 #endif
30 
31 #ifndef _RTL_REF_HXX_
32 #include "rtl/ref.hxx"
33 #endif
34 
35 #ifndef _OSL_INTERLCK_H_
36 #include "osl/interlck.h"
37 #endif
38 
39 namespace store
40 {
41 
42 /*========================================================================
43  *
44  * IStoreHandle interface.
45  *
46  *======================================================================*/
47 class IStoreHandle : public rtl::IReference
48 {
49 public:
50 	/** Replaces dynamic_cast type checking.
51 	 */
52 	virtual sal_Bool SAL_CALL isKindOf (sal_uInt32 nTypeId) = 0;
53 };
54 
55 
56 /** Template helper function as dynamic_cast replacement.
57  */
58 template<class store_handle_type>
59 store_handle_type * SAL_CALL query (
60 	IStoreHandle * pHandle, store_handle_type *);
61 
62 /*========================================================================
63  *
64  * OStoreObject interface.
65  *
66  *======================================================================*/
67 class OStoreObject : public store::IStoreHandle
68 {
69 	/** Template function specialization as dynamic_cast replacement.
70 	 */
71 	friend OStoreObject*
72 	SAL_CALL query<> (IStoreHandle *pHandle, OStoreObject*);
73 
74 public:
75 	/** Construction.
76 	 */
77 	OStoreObject (void);
78 
79 	/** Allocation.
80 	 */
81 	static void* operator new (size_t n);
82 	static void  operator delete (void *p, size_t);
83 
84 	/** IStoreHandle.
85 	 */
86 	virtual sal_Bool SAL_CALL isKindOf (sal_uInt32 nTypeId);
87 
88 	/** IReference.
89 	 */
90 	virtual oslInterlockedCount SAL_CALL acquire (void);
91 	virtual oslInterlockedCount SAL_CALL release (void);
92 
93 protected:
94 	/** Destruction.
95 	 */
96 	virtual ~OStoreObject (void);
97 
98 private:
99 	/** The IStoreHandle TypeId.
100 	 */
101 	static const sal_uInt32 m_nTypeId;
102 
103 	/** Representation.
104 	 */
105 	oslInterlockedCount m_nRefCount;
106 
107 	/** Not implemented.
108 	 */
109 	OStoreObject (const OStoreObject&);
110 	OStoreObject& operator= (const OStoreObject&);
111 };
112 
113 /** Template function specialization as dynamic_cast replacement.
114  */
115 template<> inline OStoreObject*
query(IStoreHandle * pHandle,OStoreObject *)116 SAL_CALL query (IStoreHandle *pHandle, OStoreObject*)
117 {
118 	if (pHandle && pHandle->isKindOf (OStoreObject::m_nTypeId))
119 	{
120 		// Handle is kind of OStoreObject.
121 		return static_cast<OStoreObject*>(pHandle);
122 	}
123 	return 0;
124 }
125 
126 /*========================================================================
127  *
128  * The End.
129  *
130  *======================================================================*/
131 
132 } // namespace store
133 
134 #endif /* !_STORE_OBJECT_HXX_ */
135