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
|
/**
* @file llrefcount.cpp
* @brief Base class for reference counted objects for use with LLPointer
*
* $LicenseInfo:firstyear=2002&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2010, Linden Research, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License only.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
* $/LicenseInfo$
*/
#include "linden_common.h"
#include "llrefcount.h"
#include "llerror.h"
#if LL_REF_COUNT_DEBUG
#include "llthread.h"
#include "llapr.h"
#endif
LLRefCount::LLRefCount(const LLRefCount& other)
: mRef(0)
{
#if LL_REF_COUNT_DEBUG
if(gAPRPoolp)
{
mMutexp = new LLMutex(gAPRPoolp) ;
}
else
{
mMutexp = NULL ;
}
mCrashAtUnlock = FALSE ;
#endif
}
LLRefCount& LLRefCount::operator=(const LLRefCount&)
{
// do nothing, since ref count is specific to *this* reference
return *this;
}
LLRefCount::LLRefCount() :
mRef(0)
{
#if LL_REF_COUNT_DEBUG
if(gAPRPoolp)
{
mMutexp = new LLMutex(gAPRPoolp) ;
}
else
{
mMutexp = NULL ;
}
mCrashAtUnlock = FALSE ;
#endif
}
LLRefCount::~LLRefCount()
{
if (mRef != 0)
{
llerrs << "deleting non-zero reference" << llendl;
}
#if LL_REF_COUNT_DEBUG
if(gAPRPoolp)
{
delete mMutexp ;
}
#endif
}
#if LL_REF_COUNT_DEBUG
void LLRefCount::ref() const
{
if(mMutexp)
{
if(mMutexp->isLocked())
{
mCrashAtUnlock = TRUE ;
llerrs << "the mutex is locked by the thread: " << mLockedThreadID
<< " Current thread: " << LLThread::currentID() << llendl ;
}
mMutexp->lock() ;
mLockedThreadID = LLThread::currentID() ;
mRef++;
if(mCrashAtUnlock)
{
while(1); //crash here.
}
mMutexp->unlock() ;
}
else
{
mRef++;
}
}
S32 LLRefCount::unref() const
{
if(mMutexp)
{
if(mMutexp->isLocked())
{
mCrashAtUnlock = TRUE ;
llerrs << "the mutex is locked by the thread: " << mLockedThreadID
<< " Current thread: " << LLThread::currentID() << llendl ;
}
mMutexp->lock() ;
mLockedThreadID = LLThread::currentID() ;
llassert(mRef >= 1);
if (0 == --mRef)
{
if(mCrashAtUnlock)
{
while(1); //crash here.
}
mMutexp->unlock() ;
delete this;
return 0;
}
if(mCrashAtUnlock)
{
while(1); //crash here.
}
mMutexp->unlock() ;
return mRef;
}
else
{
llassert(mRef >= 1);
if (0 == --mRef)
{
delete this;
return 0;
}
return mRef;
}
}
#endif
|
