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
|
// $Id$
#if !defined (ACE_SINGLETON_C)
#define ACE_SINGLETON_C
#define ACE_BUILD_DLL
#include "ace/Singleton.h"
#include "ace/Synch_T.h"
#include "ace/Object_Manager.h"
#if !defined (__ACE_INLINE__)
#include "ace/Singleton.i"
#endif /* __ACE_INLINE__ */
template <class TYPE, class ACE_LOCK> void
ACE_Singleton<TYPE, ACE_LOCK>::dump (void)
{
ACE_TRACE ("ACE_Singleton<TYPE, ACE_LOCK>::dump");
#if !defined (ACE_LACKS_STATIC_DATA_MEMBER_TEMPLATES)
ACE_DEBUG ((LM_DEBUG, "instance_ = %x",
ACE_Singleton<TYPE, ACE_LOCK>::instance_i ()));
ACE_DEBUG ((LM_DEBUG, ACE_END_DUMP));
#endif /* ACE_LACKS_STATIC_DATA_MEMBER_TEMPLATES */
}
template <class TYPE, class ACE_LOCK> ACE_Singleton<TYPE, ACE_LOCK> *&
ACE_Singleton<TYPE, ACE_LOCK>::instance_i (void)
{
#if defined (ACE_LACKS_STATIC_DATA_MEMBER_TEMPLATES)
// Pointer to the Singleton instance. This works around a bug with
// G++ and it's (mis-)handling of templates and statics...
static ACE_Singleton<TYPE, ACE_LOCK> *singleton_ = 0;
return singleton_;
#else
return ACE_Singleton<TYPE, ACE_LOCK>::singleton_;
#endif /* ACE_LACKS_STATIC_DATA_MEMBER_TEMPLATES */
}
template <class TYPE, class ACE_LOCK> TYPE *
ACE_Singleton<TYPE, ACE_LOCK>::instance (void)
{
ACE_TRACE ("ACE_Singleton<TYPE, ACE_LOCK>::instance");
ACE_Singleton<TYPE, ACE_LOCK> *&singleton =
ACE_Singleton<TYPE, ACE_LOCK>::instance_i ();
// Perform the Double-Check pattern...
if (singleton == 0)
{
#if defined (ACE_MT_SAFE) && (ACE_MT_SAFE != 0)
if (ACE_Object_Manager::starting_up () ||
ACE_Object_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 ACE_Object_Manager instance has been destroyed,
// so the preallocated lock is not available.
#endif /* ACE_MT_SAFE */
ACE_NEW_RETURN (singleton, (ACE_Singleton<TYPE, ACE_LOCK>), 0);
// Register for destruction with ACE_Object_Manager.
ACE_Object_Manager::at_exit (singleton);
#if defined (ACE_MT_SAFE) && (ACE_MT_SAFE != 0)
}
else
{
// Obtain a lock from the ACE_Object_Manager. The pointer
// is static, so we only obtain one per ACE_Singleton instantiation.
static ACE_LOCK *lock = 0;
if (ACE_Object_Manager::get_singleton_lock (lock) != 0)
// Failed to allocate the lock!
return 0;
ACE_GUARD_RETURN (ACE_LOCK, ace_mon, *lock, 0);
if (singleton == 0)
{
ACE_NEW_RETURN (singleton,
(ACE_Singleton<TYPE, ACE_LOCK>), 0);
// Register for destruction with ACE_Object_Manager.
ACE_Object_Manager::at_exit (singleton);
}
}
#endif /* ACE_MT_SAFE */
}
return &singleton->instance_;
}
template <class TYPE, class ACE_LOCK> void
ACE_Singleton<TYPE, ACE_LOCK>::cleanup (void *)
{
delete this;
ACE_Singleton<TYPE, ACE_LOCK>::instance_i () = 0;
}
#if !defined (ACE_LACKS_STATIC_DATA_MEMBER_TEMPLATES)
// Pointer to the Singleton instance.
template <class TYPE, class ACE_LOCK> ACE_Singleton<TYPE, ACE_LOCK> *
ACE_Singleton<TYPE, ACE_LOCK>::singleton_ = 0;
#endif /* !defined (ACE_LACKS_STATIC_DATA_MEMBER_TEMPLATES) */
template <class TYPE, class ACE_LOCK> void
ACE_TSS_Singleton<TYPE, ACE_LOCK>::dump (void)
{
ACE_TRACE ("ACE_TSS_Singleton<TYPE, ACE_LOCK>::dump");
#if !defined (ACE_LACKS_STATIC_DATA_MEMBER_TEMPLATES)
ACE_DEBUG ((LM_DEBUG, "instance_ = %x",
ACE_TSS_Singleton<TYPE, ACE_LOCK>::instance_i ()));
ACE_DEBUG ((LM_DEBUG, ACE_END_DUMP));
#endif /* ACE_LACKS_STATIC_DATA_MEMBER_TEMPLATES */
}
template <class TYPE, class ACE_LOCK> ACE_TSS_Singleton<TYPE, ACE_LOCK> *&
ACE_TSS_Singleton<TYPE, ACE_LOCK>::instance_i (void)
{
#if defined (ACE_LACKS_STATIC_DATA_MEMBER_TEMPLATES)
// Pointer to the Singleton instance. This works around a bug with
// G++ and it's (mis-)handling of templates and statics...
static ACE_TSS_Singleton<TYPE, ACE_LOCK> *singleton_ = 0;
return singleton_;
#else
return ACE_TSS_Singleton<TYPE, ACE_LOCK>::singleton_;
#endif /* ACE_LACKS_STATIC_DATA_MEMBER_TEMPLATES */
}
template <class TYPE, class ACE_LOCK> TYPE *
ACE_TSS_Singleton<TYPE, ACE_LOCK>::instance (void)
{
ACE_TRACE ("ACE_TSS_Singleton<TYPE, ACE_LOCK>::instance");
ACE_TSS_Singleton<TYPE, ACE_LOCK> *&singleton =
ACE_TSS_Singleton<TYPE, ACE_LOCK>::instance_i ();
// Perform the Double-Check pattern...
if (singleton == 0)
{
#if defined (ACE_MT_SAFE) && (ACE_MT_SAFE != 0)
if (ACE_Object_Manager::starting_up () ||
ACE_Object_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 ACE_Object_Manager instance has been destroyed,
// so the preallocated lock is not available.
#endif /* ACE_MT_SAFE */
ACE_NEW_RETURN (singleton, (ACE_TSS_Singleton<TYPE, ACE_LOCK>), 0);
// Register for destruction with ACE_Object_Manager.
ACE_Object_Manager::at_exit (singleton);
#if defined (ACE_MT_SAFE) && (ACE_MT_SAFE != 0)
}
else
{
// Obtain a lock from the ACE_Object_Manager. The pointer
// is static, so we only obtain one per ACE_Singleton instantiation.
static ACE_LOCK *lock = 0;
if (ACE_Object_Manager::get_singleton_lock (lock) != 0)
// Failed to allocate the lock!
return 0;
ACE_GUARD_RETURN (ACE_LOCK, ace_mon, *lock, 0);
if (singleton == 0)
{
ACE_NEW_RETURN (singleton,
(ACE_TSS_Singleton<TYPE, ACE_LOCK>), 0);
// Register for destruction with ACE_Object_Manager.
ACE_Object_Manager::at_exit (singleton);
}
}
#endif /* ACE_MT_SAFE */
}
return ACE_TSS_GET (&singleton->instance_, TYPE);
}
template <class TYPE, class ACE_LOCK> void
ACE_TSS_Singleton<TYPE, ACE_LOCK>::cleanup (void *)
{
ACE_TRACE ("ACE_TSS_Singleton::cleanup");
delete this;
ACE_TSS_Singleton<TYPE, ACE_LOCK>::instance_i () = 0;
}
#if !defined (ACE_LACKS_STATIC_DATA_MEMBER_TEMPLATES)
// Pointer to the Singleton instance.
template <class TYPE, class ACE_LOCK> ACE_TSS_Singleton <TYPE, ACE_LOCK> *
ACE_TSS_Singleton<TYPE, ACE_LOCK>::singleton_ = 0;
#endif /* !defined (ACE_LACKS_STATIC_DATA_MEMBER_TEMPLATES) */
#endif /* ACE_SINGLETON_C */
|
