1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
|
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#ifndef INCLUDED_FRAMEWORK_SOURCE_INC_LOADENV_ACTIONLOCKGUARD_HXX
#define INCLUDED_FRAMEWORK_SOURCE_INC_LOADENV_ACTIONLOCKGUARD_HXX
#include <com/sun/star/document/XActionLockable.hpp>
#include <osl/mutex.hxx>
namespace framework{
/** @short implements a guard, which can use the interface
<type scope="css::document">XActionLockable</type>.
@descr This guard should be used to be sure, that any lock will be
released. Otherwise the locked document can hinder the office on shutdown!
*/
class ActionLockGuard final
{
// member
private:
osl::Mutex m_mutex;
/** @short points to the object, which can be locked from outside. */
css::uno::Reference< css::document::XActionLockable > m_xActionLock;
/** @short knows if a lock exists on the internal lock object
forced by this guard instance. */
bool m_bActionLocked;
// interface
public:
/** @short default ctor to initialize a "non working guard".
@descr That can be useful in cases, where no resource still exists,
but will be available next time. Then this guard can be used
in a mode "use guard for more than one resources".
*/
ActionLockGuard()
: m_bActionLocked(false)
{
}
/** @short release this guard instance and make sure, that no lock
will exist afterwards on the internal wrapped resource.
*/
~ActionLockGuard()
{
unlock();
}
/** @short set a new resource for locking at this guard.
@descr This call will fail, if an internal resource already exists
and is currently locked.
@param xLock
points to the outside resource, which should be locked.
@return sal_True, if new resource could be set and locked.
sal_False otherwise.
*/
bool setResource(const css::uno::Reference< css::document::XActionLockable >& xLock)
{
osl::MutexGuard g(m_mutex);
if (m_bActionLocked || !xLock.is())
return false;
m_xActionLock = xLock;
m_xActionLock->addActionLock();
m_bActionLocked = m_xActionLock->isActionLocked();
return true;
}
/** @short set a new resource for locking at this guard.
@descr This call will fail, if an internal resource already exists
and is currently locked.
@param xLock
points to the outside resource, which should be locked.
@return sal_True, if new resource could be set and locked.
sal_False otherwise.
*/
void freeResource()
{
// SAFE -> ..........................
osl::ClearableMutexGuard aMutexLock(m_mutex);
css::uno::Reference< css::document::XActionLockable > xLock = m_xActionLock;
bool bLocked = m_bActionLocked;
m_xActionLock.clear();
m_bActionLocked = false;
aMutexLock.clear();
// <- SAFE ..........................
if (bLocked && xLock.is())
xLock->removeActionLock();
}
/** @short unlock the internal wrapped resource, if it's not already done. */
void unlock()
{
osl::MutexGuard g(m_mutex);
if (m_bActionLocked && m_xActionLock.is())
{
m_xActionLock->removeActionLock();
// don't check for any locks here ...
// May another guard use the same lock object :-(
m_bActionLocked = false;
}
}
};
} // namespace framework
#endif // INCLUDED_FRAMEWORK_SOURCE_INC_LOADENV_ACTIONLOCKGUARD_HXX
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|
