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
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
|
// -*- C++ -*-
#ifndef TAO_SINGLETON_CPP
#define TAO_SINGLETON_CPP
#include "tao/TAO_Singleton.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#include "tao/TAO_Singleton_Manager.h"
#include "ace/Guard_T.h"
#include "ace/Object_Manager.h"
#include "tao/debug.h"
#include "ace/os_include/os_typeinfo.h"
#if !defined (__ACE_INLINE__)
#include "tao/TAO_Singleton.inl"
#endif /* __ACE_INLINE__ */
TAO_BEGIN_VERSIONED_NAMESPACE_DECL
template <class TYPE, class ACE_LOCK> void
TAO_Singleton<TYPE, ACE_LOCK>::dump (void)
{
#if defined (ACE_HAS_DUMP)
ACE_TRACE ("TAO_Singleton<TYPE, ACE_LOCK>::dump");
TAOLIB_DEBUG ((LM_DEBUG, ACE_TEXT ("instance_ = %@"),
TAO_Singleton<TYPE, ACE_LOCK>::instance_i ()));
TAOLIB_DEBUG ((LM_DEBUG, ACE_END_DUMP));
#endif /* ACE_HAS_DUMP */
}
template <class TYPE, class ACE_LOCK> TAO_Singleton<TYPE, ACE_LOCK> *&
TAO_Singleton<TYPE, ACE_LOCK>::instance_i (void)
{
return TAO_Singleton<TYPE, ACE_LOCK>::singleton_;
}
template <class TYPE, class ACE_LOCK> TYPE *
TAO_Singleton<TYPE, ACE_LOCK>::instance (void)
{
ACE_TRACE ("TAO_Singleton<TYPE, ACE_LOCK>::instance");
TAO_Singleton<TYPE, ACE_LOCK> *&singleton =
TAO_Singleton<TYPE, ACE_LOCK>::instance_i ();
// Perform the Double-Check pattern...
if (singleton == 0)
{
if (TAO_Singleton_Manager::starting_up () ||
TAO_Singleton_Manager::shutting_down ())
{
// The program is still starting up, and therefore assumed
// to be single threaded. There's no need to double-check.
// Or, the TAO_Singleton_Manager instance has been destroyed,
// so the preallocated lock is not available. Either way,
// don't register for destruction with the
// TAO_Singleton_Manager: we'll have to leak this instance.
ACE_NEW_RETURN (singleton, (TAO_Singleton<TYPE, ACE_LOCK>), 0);
}
else
{
#if defined (ACE_MT_SAFE) && (ACE_MT_SAFE != 0)
// Obtain a lock from the ACE_Object_Manager. The pointer
// is static, so we only obtain one per TAO_Singleton
// instantiation.
static ACE_LOCK *lock = 0;
if (ACE_Object_Manager::get_singleton_lock (lock) != 0)
// Failed to acquire the lock!
return 0;
ACE_GUARD_RETURN (ACE_LOCK, ace_mon, *lock, 0);
if (singleton == 0)
{
#endif /* ACE_MT_SAFE */
ACE_NEW_RETURN (singleton, (TAO_Singleton<TYPE, ACE_LOCK>), 0);
// Register for destruction with TAO_Singleton_Manager.
#if !defined (ACE_MT_SAFE) || (ACE_MT_SAFE == 0)
TAO_Singleton_Manager::at_exit (singleton, 0,
typeid (TYPE).name ());
#else
TAO_Singleton_Manager::at_exit (singleton, &lock,
typeid (TYPE).name());
}
#endif /* ACE_MT_SAFE */
}
}
return &singleton->instance_;
}
template <class TYPE, class ACE_LOCK> void
TAO_Singleton<TYPE, ACE_LOCK>::cleanup (void *param)
{
delete this;
TAO_Singleton<TYPE, ACE_LOCK>::instance_i () = 0;
#if defined ACE_MT_SAFE && ACE_MT_SAFE != 0
if (param)
{
ACE_LOCK **lock = static_cast<ACE_LOCK **> (param);
*lock = 0;
}
#endif
}
// Pointer to the Singleton instance.
template <class TYPE, class ACE_LOCK> TAO_Singleton<TYPE, ACE_LOCK> *
TAO_Singleton<TYPE, ACE_LOCK>::singleton_ = 0;
template <class TYPE, class ACE_LOCK> TAO_TSS_Singleton<TYPE, ACE_LOCK> *
TAO_TSS_Singleton<TYPE, ACE_LOCK>::singleton_ = 0;
template <class TYPE, class ACE_LOCK> void
TAO_TSS_Singleton<TYPE, ACE_LOCK>::dump (void)
{
#if defined (ACE_HAS_DUMP)
ACE_TRACE ("TAO_TSS_Singleton<TYPE, ACE_LOCK>::dump");
TAOLIB_DEBUG ((LM_DEBUG, ACE_TEXT ("instance_ = %@"),
TAO_TSS_Singleton<TYPE, ACE_LOCK>::instance_i ()));
TAOLIB_DEBUG ((LM_DEBUG, ACE_END_DUMP));
#endif /* ACE_HAS_DUMP */
}
template <class TYPE, class ACE_LOCK> TAO_TSS_Singleton<TYPE, ACE_LOCK> *&
TAO_TSS_Singleton<TYPE, ACE_LOCK>::instance_i (void)
{
return TAO_TSS_Singleton<TYPE, ACE_LOCK>::singleton_;
}
template <class TYPE, class ACE_LOCK> TYPE *
TAO_TSS_Singleton<TYPE, ACE_LOCK>::instance (void)
{
ACE_TRACE ("TAO_TSS_Singleton<TYPE, ACE_LOCK>::instance");
TAO_TSS_Singleton<TYPE, ACE_LOCK> *&singleton =
TAO_TSS_Singleton<TYPE, ACE_LOCK>::instance_i ();
// Perform the Double-Check pattern...
if (singleton == 0)
{
if (TAO_Singleton_Manager::starting_up () ||
TAO_Singleton_Manager::shutting_down ())
{
// The program is still starting up, and therefore assumed
// to be single threaded. There's no need to double-check.
// Or, the TAO_Singleton_Manager instance has been destroyed,
// so the preallocated lock is not available. Either way,
// don't register for destruction with the
// TAO_Singleton_Manager: we'll have to leak this instance.
ACE_NEW_RETURN (singleton, (TAO_TSS_Singleton<TYPE, ACE_LOCK>), 0);
}
else
{
#if defined (ACE_MT_SAFE) && (ACE_MT_SAFE != 0)
// Obtain a lock from the ACE_Object_Manager. The pointer
// is static, so we only obtain one per TAO_Singleton
// instantiation.
static ACE_LOCK *lock = 0;
if (ACE_Object_Manager::get_singleton_lock (lock) != 0)
// Failed to acquire the lock!
return 0;
ACE_GUARD_RETURN (ACE_LOCK, ace_mon, *lock, 0);
if (singleton == 0)
{
#endif /* ACE_MT_SAFE */
ACE_NEW_RETURN (singleton, (TAO_TSS_Singleton<TYPE, ACE_LOCK>),
0);
// Register for destruction with TAO_Singleton_Manager.
TAO_Singleton_Manager::at_exit (singleton, 0, typeid (TYPE).name ());
#if defined (ACE_MT_SAFE) && (ACE_MT_SAFE != 0)
}
#endif /* ACE_MT_SAFE */
}
}
return ACE_TSS_GET (&singleton->instance_, TYPE);
}
template <class TYPE, class ACE_LOCK> void
TAO_TSS_Singleton<TYPE, ACE_LOCK>::cleanup (void *)
{
delete this;
TAO_TSS_Singleton<TYPE, ACE_LOCK>::instance_i () = 0;
}
TAO_END_VERSIONED_NAMESPACE_DECL
#endif /* TAO_SINGLETON_CPP */
|
