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
88 Reference (Reference<reference_type> && handle) noexcept
89 : m_pBody (handle.m_pBody)
90 {
91 handle.m_pBody = nullptr;
92 }
93#endif
94
95#if defined LIBO_INTERNAL_ONLY
102 template< class derived_type >
103 inline Reference(
104 const Reference< derived_type > & rRef,
105 std::enable_if_t<std::is_base_of_v<reference_type, derived_type>, int> = 0 )
106 : m_pBody (rRef.get())
107 {
108 if (m_pBody)
109 m_pBody->acquire();
110 }
111
116 template< class super_type,
117 std::enable_if_t<std::is_base_of_v<super_type, reference_type>, int> = 0 >
118 inline operator css::uno::Reference<super_type>() const
119 {
120 return css::uno::Reference<super_type>(m_pBody);
121 }
122#endif
123
126 ~Reference() COVERITY_NOEXCEPT_FALSE
127 {
128 if (m_pBody)
129 m_pBody->release();
130 }
131
135 Reference<reference_type> &
136 SAL_CALL set (reference_type * pBody)
137 {
138 if (pBody)
139 pBody->acquire();
140 reference_type * const pOld = m_pBody;
141 m_pBody = pBody;
142 if (pOld)
143 pOld->release();
144 return *this;
145 }
146
151 Reference<reference_type> &
152 SAL_CALL operator= (const Reference<reference_type> & handle)
153 {
154 return set( handle.m_pBody );
155 }
156
157#ifdef LIBO_INTERNAL_ONLY
163 Reference<reference_type> &
164 operator= (Reference<reference_type> && handle)
165 {
166 // self-movement guts ourself
167 if (m_pBody)
168 m_pBody->release();
169 m_pBody = handle.m_pBody;
170 handle.m_pBody = nullptr;
171 return *this;
172 }
173#endif
174
177 Reference<reference_type> &
178 SAL_CALL operator= (reference_type * pBody)
179 {
180 return set( pBody );
181 }
182
190 Reference<reference_type> & SAL_CALL clear()
191 {
192 if (m_pBody)
193 {
194 reference_type * const pOld = m_pBody;
195 m_pBody = NULL;
196 pOld->release();
197 }
198 return *this;
199 }
200
201
206 reference_type * SAL_CALL get() const
207 {
208 return m_pBody;
209 }
210
211
214 reference_type * SAL_CALL operator->() const
215 {
216 assert(m_pBody != NULL);
217 return m_pBody;
218 }
219
220
223 reference_type & SAL_CALL operator*() const
224 {
225 assert(m_pBody != NULL);
226 return *m_pBody;
227 }
228
229
232 bool SAL_CALL is() const
233 {
234 return (m_pBody != NULL);
235 }
236
237#if defined LIBO_INTERNAL_ONLY
240 explicit operator bool() const
241 {
242 return is();
243 }
244#endif
245
248 bool SAL_CALL operator== (const reference_type * pBody) const
249 {
250 return (m_pBody == pBody);
251 }
252
253
256 bool
257 SAL_CALL operator== (const Reference<reference_type> & handle) const
258 {
259 return (m_pBody == handle.m_pBody);
260 }
261
262
265 bool
266 SAL_CALL operator!= (const Reference<reference_type> & handle) const
267 {
268 return (m_pBody != handle.m_pBody);
269 }
270
271
274 bool
275 SAL_CALL operator< (const Reference<reference_type> & handle) const
276 {
277 return (m_pBody < handle.m_pBody);
278 }
279
280
283 bool
284 SAL_CALL operator> (const Reference<reference_type> & handle) const
285 {
286 return (m_pBody > handle.m_pBody);
287 }
288};
289
290} // namespace rtl
291
292#if defined LIBO_INTERNAL_ONLY
293namespace std
294{
295
297
302template<typename T>
303struct hash<::rtl::Reference<T>>
304{
305 std::size_t operator()(::rtl::Reference<T> const & s) const
306 { return std::size_t(s.get()); }
307};
309
310}
311
312#endif
313
314#endif /* ! INCLUDED_RTL_REF_HXX */
315
316/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
types.h
__sal_NoAcquire
__sal_NoAcquire
Definition types.h:353
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:349
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:266
rtl::Reference::operator>
bool operator>(const Reference< reference_type > &handle) const
Needed to place References into STL collection.
Definition ref.hxx:284
rtl::Reference::clear
Reference< reference_type > & clear()
Unbind the body from this handle.
Definition ref.hxx:190
rtl::Reference::set
Reference< reference_type > & set(reference_type *pBody)
Set... Similar to assignment.
Definition ref.hxx:136
rtl::Reference::operator==
bool operator==(const reference_type *pBody) const
Returns True if this points to pBody.
Definition ref.hxx:248
rtl::Reference::get
reference_type * get() const
Get the body.
Definition ref.hxx:206
rtl::Reference::is
bool is() const
Returns True if the handle does point to a valid body.
Definition ref.hxx:232
rtl::Reference::operator*
reference_type & operator*() const
Allows (*handle).someBodyOp().
Definition ref.hxx:223
rtl::Reference::operator->
reference_type * operator->() const
Probably most common used: handle->someBodyOp().
Definition ref.hxx:214
rtl::Reference::~Reference
~Reference() COVERITY_NOEXCEPT_FALSE
Destructor...
Definition ref.hxx:126
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:152
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:275
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