Line data Source code
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_FRAMEWORK_INC_HELPER_SHAREABLEMUTEX_HXX
21 : #define INCLUDED_FRAMEWORK_INC_HELPER_SHAREABLEMUTEX_HXX
22 :
23 : #include <osl/interlck.h>
24 : #include <osl/mutex.hxx>
25 : #include <fwidllapi.h>
26 :
27 : namespace framework
28 : {
29 :
30 : /**
31 : * This acts like a rtl::Reference<osl::Mutex>
32 : */
33 : class FWI_DLLPUBLIC ShareableMutex
34 : {
35 : public:
36 : ShareableMutex();
37 : ShareableMutex( const ShareableMutex& rShareableMutex );
38 : const ShareableMutex& operator=( const ShareableMutex& rShareableMutex );
39 :
40 3226 : ~ShareableMutex() { m_pMutexRef->release(); }
41 :
42 : /** acquire the shared mutex */
43 : void acquire();
44 : /** release the shared mutex */
45 : void release();
46 :
47 : private:
48 : /* ShareableMutex::MutexRef will destroy itself when the last ShareableMutex pointing to it is destroyed */
49 249 : struct MutexRef
50 : {
51 250 : MutexRef() : m_refCount(0) {}
52 3240 : void acquire()
53 : {
54 3240 : osl_atomic_increment( &m_refCount );
55 3240 : }
56 :
57 3226 : void release()
58 : {
59 3226 : if ( osl_atomic_decrement( &m_refCount ) == 0 )
60 249 : delete this;
61 3226 : }
62 :
63 : oslInterlockedCount m_refCount;
64 : osl::Mutex m_oslMutex;
65 : };
66 :
67 : MutexRef* m_pMutexRef;
68 : };
69 :
70 : class ShareGuard
71 : {
72 : public:
73 631416 : ShareGuard( ShareableMutex& rShareMutex ) :
74 631416 : m_rShareMutex( rShareMutex )
75 : {
76 631416 : m_rShareMutex.acquire();
77 631416 : }
78 :
79 631416 : ~ShareGuard()
80 : {
81 631416 : m_rShareMutex.release();
82 631416 : }
83 :
84 : private:
85 : ShareGuard& operator=( const ShareGuard& ) SAL_DELETED_FUNCTION;
86 :
87 : ShareableMutex& m_rShareMutex;
88 : };
89 :
90 : }
91 :
92 : #endif // INCLUDED_FRAMEWORK_INC_HELPER_SHAREABLEMUTEX_HXX
93 :
94 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|