LibreOffice: rtl/ref.hxx Source File

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ref.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_RTL_REF_HXX
25#define INCLUDED_RTL_REF_HXX
26
27#include "sal/config.h"
28
29#include <cassert>
30#include <cstddef>
31#include <functional>
32#ifdef LIBO_INTERNAL_ONLY
33#include <type_traits>
34#include "com/sun/star/uno/Reference.h"
35#endif
36
37#include "sal/types.h"
38
39namespace rtl
40{
41
44template <class reference_type>
45 class Reference
46{
49 reference_type * m_pBody;
50
51
52public:
55 Reference()
56 : m_pBody (NULL)
57 {}
58
59
62 Reference (reference_type * pBody, __sal_NoAcquire)
63 : m_pBody (pBody)
64 {
65 }
66
69 Reference (reference_type * pBody)
70 : m_pBody (pBody)
71 {
72 if (m_pBody)
73 m_pBody->acquire();
74 }
75
78 Reference (const Reference<reference_type> & handle)
79 : m_pBody (handle.m_pBody)
80 {
81 if (m_pBody)
82 m_pBody->acquire();
83 }
84
85#ifdef LIBO_INTERNAL_ONLY
86#if !defined(__COVERITY__) // suppress COPY_INSTEAD_OF_MOVE suggestions
89 Reference (Reference<reference_type> && handle) noexcept
90 : m_pBody (handle.m_pBody)
91 {
92 handle.m_pBody = nullptr;
93 }
94#endif
95#endif
96
97#if defined LIBO_INTERNAL_ONLY
102 template <class super_type,
103 std::enable_if_t<std::is_base_of_v<super_type, reference_type>, int> = 0>
104 inline operator Reference<super_type>() const
105 {
106 return Reference<super_type>(m_pBody);
107 }
108
113 template< class super_type,
114 std::enable_if_t<std::is_base_of_v<super_type, reference_type>, int> = 0 >
115 inline operator css::uno::Reference<super_type>() const
116 {
117 return css::uno::Reference<super_type>(m_pBody);
118 }
119#endif
120
123 ~Reference() COVERITY_NOEXCEPT_FALSE
124 {
125 if (m_pBody)
126 m_pBody->release();
127 }
128
132 Reference<reference_type> &
133 SAL_CALL set (reference_type * pBody)
134 {
135 if (pBody)
136 pBody->acquire();
137 reference_type * const pOld = m_pBody;
138 m_pBody = pBody;
139 if (pOld)
140 pOld->release();
141 return *this;
142 }
143
148 Reference<reference_type> &
149 SAL_CALL operator= (const Reference<reference_type> & handle)
150 {
151 return set( handle.m_pBody );
152 }
153
154#ifdef LIBO_INTERNAL_ONLY
160 Reference<reference_type> &
161 operator= (Reference<reference_type> && handle)
162 {
163 // self-movement guts ourself
164 if (m_pBody)
165 m_pBody->release();
166 m_pBody = handle.m_pBody;
167 handle.m_pBody = nullptr;
168 return *this;
169 }
170#endif
171
174 Reference<reference_type> &
175 SAL_CALL operator= (reference_type * pBody)
176 {
177 return set( pBody );
178 }
179
187 Reference<reference_type> & SAL_CALL clear()
188 {
189 if (m_pBody)
190 {
191 reference_type * const pOld = m_pBody;
192 m_pBody = NULL;
193 pOld->release();
194 }
195 return *this;
196 }
197
198
203 reference_type * SAL_CALL get() const
204 {
205 return m_pBody;
206 }
207
208
211 reference_type * SAL_CALL operator->() const
212 {
213 assert(m_pBody != NULL);
214 return m_pBody;
215 }
216
217
220 reference_type & SAL_CALL operator*() const
221 {
222 assert(m_pBody != NULL);
223 return *m_pBody;
224 }
225
226
229 bool SAL_CALL is() const
230 {
231 return (m_pBody != NULL);
232 }
233
234#if defined LIBO_INTERNAL_ONLY
237 explicit operator bool() const
238 {
239 return is();
240 }
241#endif
242
245 bool SAL_CALL operator== (const reference_type * pBody) const
246 {
247 return (m_pBody == pBody);
248 }
249
250
253 bool
254 SAL_CALL operator== (const Reference<reference_type> & handle) const
255 {
256 return (m_pBody == handle.m_pBody);
257 }
258
259
262 bool
263 SAL_CALL operator!= (const Reference<reference_type> & handle) const
264 {
265 return (m_pBody != handle.m_pBody);
266 }
267
268
271 bool
272 SAL_CALL operator< (const Reference<reference_type> & handle) const
273 {
274 return (m_pBody < handle.m_pBody);
275 }
276
277
280 bool
281 SAL_CALL operator> (const Reference<reference_type> & handle) const
282 {
283 return (m_pBody > handle.m_pBody);
284 }
285};
286
287} // namespace rtl
288
289#if defined LIBO_INTERNAL_ONLY
290namespace std
291{
292
294
299template<typename T>
300struct hash<::rtl::Reference<T>>
301{
302 std::size_t operator()(::rtl::Reference<T> const & s) const
303 { return std::size_t(s.get()); }
304};
306
307}
308
309#endif
310
311#endif /* ! INCLUDED_RTL_REF_HXX */
312
313/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
types.h
__sal_NoAcquire
__sal_NoAcquire
Definition types.h:371
COVERITY_NOEXCEPT_FALSE
#define COVERITY_NOEXCEPT_FALSE
To markup destructors that coverity warns might throw exceptions which won't throw in practice,...
Definition types.h:367
config.h
Reference.h
rtl
Definition bootstrap.hxx:34
rtl::Reference
Template reference class for reference type.
Definition ref.hxx:46
rtl::Reference::operator!=
bool operator!=(const Reference< reference_type > &handle) const
Needed to place References into STL collection.
Definition ref.hxx:263
rtl::Reference::operator>
bool operator>(const Reference< reference_type > &handle) const
Needed to place References into STL collection.
Definition ref.hxx:281
rtl::Reference::clear
Reference< reference_type > & clear()
Unbind the body from this handle.
Definition ref.hxx:187
rtl::Reference::set
Reference< reference_type > & set(reference_type *pBody)
Set... Similar to assignment.
Definition ref.hxx:133
rtl::Reference::operator==
bool operator==(const reference_type *pBody) const
Returns True if this points to pBody.
Definition ref.hxx:245
rtl::Reference::get
reference_type * get() const
Get the body.
Definition ref.hxx:203
rtl::Reference::is
bool is() const
Returns True if the handle does point to a valid body.
Definition ref.hxx:229
rtl::Reference::operator*
reference_type & operator*() const
Allows (*handle).someBodyOp().
Definition ref.hxx:220
rtl::Reference::operator->
reference_type * operator->() const
Probably most common used: handle->someBodyOp().
Definition ref.hxx:211
rtl::Reference::~Reference
~Reference() COVERITY_NOEXCEPT_FALSE
Destructor...
Definition ref.hxx:123
rtl::Reference::Reference
Reference(const Reference< reference_type > &handle)
Copy constructor...
Definition ref.hxx:78
rtl::Reference::operator=
Reference< reference_type > & operator=(const Reference< reference_type > &handle)
Assignment.
Definition ref.hxx:149
rtl::Reference::Reference
Reference()
Constructor...
Definition ref.hxx:55
rtl::Reference::operator<
bool operator<(const Reference< reference_type > &handle) const
Needed to place References into STL collection.
Definition ref.hxx:272
rtl::Reference::Reference
Reference(reference_type *pBody, __sal_NoAcquire)
Constructor...
Definition ref.hxx:62
rtl::Reference::Reference
Reference(reference_type *pBody)
Constructor...
Definition ref.hxx:69