blob: 584085cabea027342096b45d0aa0f155e47b93f5 (
plain)
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
|
/*
* Copyright (C) 2007-2019 Xagasoft, All rights reserved.
*
* This file is part of the libbu++ library and is released under the
* terms of the license contained in the file LICENSE.
*/
#ifndef BU_ATOM_H
#define BU_ATOM_H
#include <stdint.h>
#include <memory>
#include "bu/config.h"
#include "bu/exceptionbase.h"
namespace Bu
{
/**
*
*@ingroup Containers
*/
template <typename t, typename talloc=std::allocator<t> >
class Atom
{
private:
typedef class Atom<t, talloc> MyType;
public:
Atom() :
pData( NULL )
{
}
Atom( const MyType &oth ) :
pData( NULL )
{
if( oth.pData )
set( *oth.pData );
}
Atom( const t &oth ) :
pData( NULL )
{
set( oth );
}
virtual ~Atom()
{
clear();
}
bool has() const
{
return (pData != NULL);
}
void set( const t &val )
{
clear();
pData = ta.allocate( 1 );
ta.construct( pData, val );
}
t &get()
{
if( !pData )
throw Bu::ExceptionBase("Not set");
return *pData;
}
const t &get() const
{
if( !pData )
throw Bu::ExceptionBase("Not set");
return *pData;
}
void clear()
{
if( pData )
{
ta.destroy( pData );
ta.deallocate( pData, 1 );
pData = NULL;
}
}
operator const t &() const
{
if( !pData )
throw Bu::ExceptionBase("Not set");
return *pData;
}
operator t &()
{
if( !pData )
throw Bu::ExceptionBase("Not set");
return *pData;
}
MyType &operator =( const t &oth )
{
set( oth );
return *this;
}
MyType &operator =( const MyType &oth )
{
if( oth.pData )
set( *oth.pData );
return *this;
}
bool operator ==( const MyType &oth )
{
return (*pData) == (*oth.pData);
}
bool operator ==( const t &oth )
{
return (*pData) == oth;
}
t *operator ->()
{
if( !pData )
throw Bu::ExceptionBase("Not set");
return pData;
}
t &operator *()
{
if( !pData )
throw Bu::ExceptionBase("Not set");
return *pData;
}
private:
t *pData;
talloc ta;
};
}
#endif
|
