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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
39 namespace rtl
40{
41
44 template <class reference_type>
45 class Reference
46{
49 reference_type * m_pBody;
50
51
52 public:
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
104 template< class derived_type >
105 inline Reference(
106 const Reference< derived_type > & rRef,
107 std::enable_if_t<std::is_base_of_v<reference_type, derived_type>, int> = 0 )
108 : m_pBody (rRef.get())
109 {
110 if (m_pBody)
111 m_pBody->acquire();
112 }
113
118 template< class super_type,
119 std::enable_if_t<std::is_base_of_v<super_type, reference_type>, int> = 0 >
120 inline operator css::uno::Reference<super_type>() const
121 {
122 return css::uno::Reference<super_type>(m_pBody);
123 }
124#endif
125
128 ~Reference() COVERITY_NOEXCEPT_FALSE
129 {
130 if (m_pBody)
131 m_pBody->release();
132 }
133
137 Reference<reference_type> &
138 SAL_CALL set (reference_type * pBody)
139 {
140 if (pBody)
141 pBody->acquire();
142 reference_type * const pOld = m_pBody;
143 m_pBody = pBody;
144 if (pOld)
145 pOld->release();
146 return *this;
147 }
148
153 Reference<reference_type> &
154 SAL_CALL operator= (const Reference<reference_type> & handle)
155 {
156 return set( handle.m_pBody );
157 }
158
159#ifdef LIBO_INTERNAL_ONLY
165 Reference<reference_type> &
166 operator= (Reference<reference_type> && handle)
167 {
168 // self-movement guts ourself
169 if (m_pBody)
170 m_pBody->release();
171 m_pBody = handle.m_pBody;
172 handle.m_pBody = nullptr;
173 return *this;
174 }
175#endif
176
179 Reference<reference_type> &
180 SAL_CALL operator= (reference_type * pBody)
181 {
182 return set( pBody );
183 }
184
192 Reference<reference_type> & SAL_CALL clear()
193 {
194 if (m_pBody)
195 {
196 reference_type * const pOld = m_pBody;
197 m_pBody = NULL;
198 pOld->release();
199 }
200 return *this;
201 }
202
203
208 reference_type * SAL_CALL get() const
209 {
210 return m_pBody;
211 }
212
213
216 reference_type * SAL_CALL operator->() const
217 {
218 assert(m_pBody != NULL);
219 return m_pBody;
220 }
221
222
225 reference_type & SAL_CALL operator*() const
226 {
227 assert(m_pBody != NULL);
228 return *m_pBody;
229 }
230
231
234 bool SAL_CALL is() const
235 {
236 return (m_pBody != NULL);
237 }
238
239#if defined LIBO_INTERNAL_ONLY
242 explicit operator bool() const
243 {
244 return is();
245 }
246#endif
247
250 bool SAL_CALL operator== (const reference_type * pBody) const
251 {
252 return (m_pBody == pBody);
253 }
254
255
258 bool
259 SAL_CALL operator== (const Reference<reference_type> & handle) const
260 {
261 return (m_pBody == handle.m_pBody);
262 }
263
264
267 bool
268 SAL_CALL operator!= (const Reference<reference_type> & handle) const
269 {
270 return (m_pBody != handle.m_pBody);
271 }
272
273
276 bool
277 SAL_CALL operator< (const Reference<reference_type> & handle) const
278 {
279 return (m_pBody < handle.m_pBody);
280 }
281
282
285 bool
286 SAL_CALL operator> (const Reference<reference_type> & handle) const
287 {
288 return (m_pBody > handle.m_pBody);
289 }
290};
291
292} // namespace rtl
293
294#if defined LIBO_INTERNAL_ONLY
295 namespace std
296{
297
299
304 template<typename T>
305 struct hash<::rtl::Reference<T>>
306{
307 std::size_t operator()(::rtl::Reference<T> const & s) const
308 { return std::size_t(s.get()); }
309};
311
312}
313
314#endif
315
316#endif /* ! INCLUDED_RTL_REF_HXX */
317
318/* 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:268
rtl::Reference::operator>
bool operator>(const Reference< reference_type > &handle) const
Needed to place References into STL collection.
Definition ref.hxx:286
rtl::Reference::clear
Reference< reference_type > & clear()
Unbind the body from this handle.
Definition ref.hxx:192
rtl::Reference::set
Reference< reference_type > & set(reference_type *pBody)
Set... Similar to assignment.
Definition ref.hxx:138
rtl::Reference::operator==
bool operator==(const reference_type *pBody) const
Returns True if this points to pBody.
Definition ref.hxx:250
rtl::Reference::get
reference_type * get() const
Get the body.
Definition ref.hxx:208
rtl::Reference::is
bool is() const
Returns True if the handle does point to a valid body.
Definition ref.hxx:234
rtl::Reference::operator*
reference_type & operator*() const
Allows (*handle).someBodyOp().
Definition ref.hxx:225
rtl::Reference::operator->
reference_type * operator->() const
Probably most common used: handle->someBodyOp().
Definition ref.hxx:216
rtl::Reference::~Reference
~Reference() COVERITY_NOEXCEPT_FALSE
Destructor...
Definition ref.hxx:128
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:154
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:277
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