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refobj.hxx
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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
20 #ifndef INCLUDED_SALHELPER_REFOBJ_HXX
21 #define INCLUDED_SALHELPER_REFOBJ_HXX
22
23 #include <sal/types.h>
24 #include <rtl/alloc.h>
25 #include <osl/diagnose.h>
26 #include <osl/interlck.h>
27
28 namespace salhelper
29 {
30
31
32
33 class ReferenceObject
34 {
37 oslInterlockedCount m_nReferenceCount;
38
41 ReferenceObject (const ReferenceObject&);
42 ReferenceObject& operator= (const ReferenceObject&);
43
44 public:
47 static void* operator new (size_t n)
48 {
49 return ::rtl_allocateMemory (n);
50 }
51 static void operator delete (void* p)
52 {
53 ::rtl_freeMemory (p);
54 }
55 static void* operator new (size_t, void* p)
56 {
57 return (p);
58 }
59 static void operator delete (void*, void*)
60 {}
61
62 public:
65 inline ReferenceObject() : m_nReferenceCount(0)
66 {}
67
68
69 void SAL_CALL acquire()
70 {
71 osl_atomic_increment(&m_nReferenceCount);
72 }
73
74 void SAL_CALL release()
75 {
76 if (osl_atomic_decrement(&m_nReferenceCount) == 0)
77 {
78 // Last reference released.
79 delete this;
80 }
81 }
82
83 protected:
86 virtual ~ReferenceObject()
87 {
88 OSL_ASSERT(m_nReferenceCount == 0);
89 }
90 };
91
92
93
94 } // namespace salhelper
95
96 #endif /* ! INCLUDED_SALHELPER_REFOBJ_HXX */
97
98 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
interlck.h
salhelper
Definition: condition.hxx:29
alloc.h
salhelper::ReferenceObject::~ReferenceObject
virtual ~ReferenceObject()
Destruction.
Definition: refobj.hxx:86
rtl_freeMemory
SAL_DLLPUBLIC void rtl_freeMemory(void *Ptr) SAL_THROW_EXTERN_C()
Free memory.
salhelper::ReferenceObject
Definition: refobj.hxx:33
diagnose.h
salhelper::ReferenceObject::release
void release()
Definition: refobj.hxx:74
oslInterlockedCount
sal_Int32 oslInterlockedCount
Definition: interlck.h:32
salhelper::ReferenceObject::acquire
void acquire()
Definition: refobj.hxx:69
salhelper::ReferenceObject::ReferenceObject
ReferenceObject()
Construction.
Definition: refobj.hxx:65
types.h
rtl_allocateMemory
SAL_DLLPUBLIC void * rtl_allocateMemory(sal_Size Bytes) SAL_THROW_EXTERN_C()
Allocate memory.
OSL_ASSERT
#define OSL_ASSERT(c)
Definition: diagnose.h:105