LibreOffice: salhelper/refobj.hxx Source File

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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/*
21 * This file is part of LibreOffice published API.
22 */
23
24#ifndef INCLUDED_SALHELPER_REFOBJ_HXX
25#define INCLUDED_SALHELPER_REFOBJ_HXX
26
27#include <cassert>
28
29#include "sal/types.h"
30#include "rtl/alloc.h"
31#include "osl/interlck.h"
32
33namespace salhelper
34{
35
40 class ReferenceObject
41{
44 oslInterlockedCount m_nReferenceCount;
45
46 ReferenceObject (const ReferenceObject&) SAL_DELETED_FUNCTION;
47 ReferenceObject& operator= (const ReferenceObject&) SAL_DELETED_FUNCTION;
48
49public:
52 static void* operator new (size_t n)
53 {
54 return ::rtl_allocateMemory (n);
55 }
56 static void operator delete (void* p)
57 {
58 ::rtl_freeMemory (p);
59 }
60 static void* operator new (size_t, void* p)
61 {
62 return p;
63 }
64 static void operator delete (void*, void*)
65 {}
66
67public:
70 ReferenceObject() : m_nReferenceCount(0)
71 {}
72
73
74 void SAL_CALL acquire()
75 {
76 osl_atomic_increment(&m_nReferenceCount);
77 }
78
79 void SAL_CALL release()
80 {
81 if (osl_atomic_decrement(&m_nReferenceCount) == 0)
82 {
83 // Last reference released.
84 delete this;
85 }
86 }
87
88protected:
91 virtual ~ReferenceObject()
92 {
93 assert(m_nReferenceCount == 0);
94 }
95};
96
97
98} // namespace salhelper
99
100#endif /* ! INCLUDED_SALHELPER_REFOBJ_HXX */
101
102/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
types.h
SAL_DELETED_FUNCTION
#define SAL_DELETED_FUNCTION
short-circuit extra-verbose API namespaces
Definition types.h:378
alloc.h
rtl_freeMemory
SAL_DLLPUBLIC void rtl_freeMemory(void *Ptr) SAL_THROW_EXTERN_C()
Free memory.
interlck.h
oslInterlockedCount
sal_Int32 oslInterlockedCount
Definition interlck.h:44
salhelper
Definition condition.hxx:34
salhelper::ReferenceObject
A base implementation for reference-counted objects.
Definition refobj.hxx:41
salhelper::ReferenceObject::acquire
void acquire()
Definition refobj.hxx:74
salhelper::ReferenceObject::~ReferenceObject
virtual ~ReferenceObject()
Destruction.
Definition refobj.hxx:91
salhelper::ReferenceObject::ReferenceObject
ReferenceObject()
Construction.
Definition refobj.hxx:70
salhelper::ReferenceObject::release
void release()
Definition refobj.hxx:79