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
145
146
147
148
149
150
151
|
/**************************************************************************
**
** This file is part of Qt Creator
**
** Copyright (c) 2011 Nokia Corporation and/or its subsidiary(-ies).
**
** Contact: Nokia Corporation (info@qt.nokia.com)
**
**
** GNU Lesser General Public License Usage
**
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this file.
** Please review the following information to ensure the GNU Lesser General
** Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** Other Usage
**
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**************************************************************************/
#ifndef DEBUGGER_CALLBACK_H
#define DEBUGGER_CALLBACK_H
#include "symbianutils_global.h"
namespace trk {
namespace Internal {
/* Helper class for the 1-argument functor:
* Cloneable base class for the implementation which is
* invokeable with the argument. */
template <class Argument>
class CallbackImplBase
{
Q_DISABLE_COPY(CallbackImplBase)
public:
CallbackImplBase() {}
virtual CallbackImplBase *clone() const = 0;
virtual void invoke(Argument a) = 0;
virtual ~CallbackImplBase() {}
};
/* Helper class for the 1-argument functor: Implementation for
* a class instance with a member function pointer. */
template <class Class, class Argument>
class CallbackMemberPtrImpl : public CallbackImplBase<Argument>
{
public:
typedef void (Class::*MemberFuncPtr)(Argument);
CallbackMemberPtrImpl(Class *instance,
MemberFuncPtr memberFunc) :
m_instance(instance),
m_memberFunc(memberFunc) {}
virtual CallbackImplBase<Argument> *clone() const
{
return new CallbackMemberPtrImpl<Class, Argument>(m_instance, m_memberFunc);
}
virtual void invoke(Argument a)
{ (m_instance->*m_memberFunc)(a); }
private:
Class *m_instance;
MemberFuncPtr m_memberFunc;
};
} // namespace Internal
/* Default-constructible, copyable 1-argument functor providing an
* operator()(Argument) that invokes a member function of a class:
* \code
class Foo {
public:
void print(const std::string &);
};
...
Foo foo;
Callback<const std::string &> f1(&foo, &Foo::print);
f1("test");
\endcode */
template <class Argument>
class Callback
{
public:
Callback() : m_impl(0) {}
template <class Class>
Callback(Class *instance, void (Class::*memberFunc)(Argument)) :
m_impl(new Internal::CallbackMemberPtrImpl<Class,Argument>(instance, memberFunc))
{}
~Callback()
{
clean();
}
Callback(const Callback &rhs) :
m_impl(0)
{
if (rhs.m_impl)
m_impl = rhs.m_impl->clone();
}
Callback &operator=(const Callback &rhs)
{
if (this != &rhs) {
clean();
if (rhs.m_impl)
m_impl = rhs.m_impl->clone();
}
return *this;
}
bool isNull() const { return m_impl == 0; }
operator bool() const { return !isNull(); }
void operator()(Argument a)
{
if (m_impl)
m_impl->invoke(a);
}
private:
void clean()
{
if (m_impl) {
delete m_impl;
m_impl = 0;
}
}
Internal::CallbackImplBase<Argument> *m_impl;
};
} // namespace trk
#endif // DEBUGGER_CALLBACK_H
|
