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
|
/****************************************************************************
* *
* OpenNI 1.x Alpha *
* Copyright (C) 2011 PrimeSense Ltd. *
* *
* This file is part of OpenNI. *
* *
* OpenNI 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, either version 3 of the License, or *
* (at your option) any later version. *
* *
* OpenNI 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 OpenNI. If not, see <http://www.gnu.org/licenses/>. *
* *
****************************************************************************/
#ifndef __XN_THREAD_SAFE_QUEUE_H__
#define __XN_THREAD_SAFE_QUEUE_H__
//---------------------------------------------------------------------------
// Includes
//---------------------------------------------------------------------------
#include <XnQueue.h>
#include <XnOS.h>
//---------------------------------------------------------------------------
// Types
//---------------------------------------------------------------------------
/**
* A thread safe queue.
*/
class XnThreadSafeQueue : public XnQueue
{
public:
XnThreadSafeQueue() : m_hLock(NULL) {}
~XnThreadSafeQueue()
{
xnOSCloseCriticalSection(&m_hLock);
}
XnStatus Init()
{
XnStatus nRetVal = XN_STATUS_OK;
nRetVal = xnOSCreateCriticalSection(&m_hLock);
XN_IS_STATUS_OK(nRetVal);
return (XN_STATUS_OK);
}
XnStatus Push(XnValue const& value)
{
XnStatus nRetVal = XN_STATUS_OK;
nRetVal = xnOSEnterCriticalSection(&m_hLock);
XN_IS_STATUS_OK(nRetVal);
nRetVal = XnQueue::Push(value);
xnOSLeaveCriticalSection(&m_hLock);
return nRetVal;
}
XnStatus Pop(XnValue& value)
{
XnStatus nRetVal = XN_STATUS_OK;
nRetVal = xnOSEnterCriticalSection(&m_hLock);
XN_IS_STATUS_OK(nRetVal);
nRetVal = XnQueue::Pop(value);
xnOSLeaveCriticalSection(&m_hLock);
return nRetVal;
}
XnUInt32 Size() const
{
xnOSEnterCriticalSection(&m_hLock);
XnUInt32 nSize = XnQueue::Size();
xnOSLeaveCriticalSection(&m_hLock);
return (nSize);
}
private:
// NOTE: we declare the lock as mutable, as it may change on const methods.
mutable XN_CRITICAL_SECTION_HANDLE m_hLock;
};
/**
* Declares a thread safe queue of type @a Type, named @a ClassName. The class uses @a Translator for translating
* from @a Type to XnValue. It is declared using the declspec @a decl.
* It inherits from @a base. Note that @a base must be a derivative of XnQueue.
*/
#define XN_DECLARE_THREAD_SAFE_QUEUE_WITH_TRANSLATOR_DECL(decl, Type, ClassName, Translator) \
class decl ClassName : public XnThreadSafeQueue \
{ \
public: \
~ClassName() \
{ \
/* We do this using Pop() to make sure memory is freed. */ \
Type dummy; \
while (Size() != 0) \
Pop(dummy); \
} \
XnStatus Push(Type const& value) \
{ \
XnValue val = Translator::CreateValueCopy(value); \
XnStatus nRetVal = XnThreadSafeQueue::Push(val); \
if (nRetVal != XN_STATUS_OK) \
{ \
Translator::FreeValue(val); \
return (nRetVal); \
} \
return XN_STATUS_OK; \
} \
XnStatus Pop(Type& value) \
{ \
XnValue val; \
XnStatus nRetVal = XnThreadSafeQueue::Pop(val); \
if (nRetVal != XN_STATUS_OK) return (nRetVal); \
value = Translator::GetFromValue(val); \
Translator::FreeValue(val); \
return XN_STATUS_OK; \
} \
};
/**
* Declares a thread safe queue of type @a Type, named @a ClassName. The class uses @a Translator for translating
* from @a Type to XnValue.
* It inherits from @a base. Note that @a base must be a derivative of XnQueue.
*/
#define XN_DECLARE_THREAD_SAFE_QUEUE_WITH_TRANSLATOR(Type, ClassName, Translator) \
XN_DECLARE_THREAD_SAFE_QUEUE_WITH_TRANSLATOR_DECL(, Type, ClassName, Translator)
/**
* Declares a thread safe queue of type @a Type, named @a ClassName, that uses the default translator.
* It is declared using the declspec @a decl.
*/
#define XN_DECLARE_THREAD_SAFE_QUEUE_DECL(decl, Type, ClassName) \
XN_DECLARE_DEFAULT_VALUE_TRANSLATOR_DECL(decl, Type, XN_DEFAULT_TRANSLATOR_NAME(ClassName)) \
XN_DECLARE_THREAD_SAFE_QUEUE_WITH_TRANSLATOR_DECL(decl, Type, ClassName, XN_DEFAULT_TRANSLATOR_NAME(ClassName))
/**
* Declares a thread safe queue of type @a Type, named @a ClassName, that uses the default translator.
*/
#define XN_DECLARE_THREAD_SAFE_QUEUE(Type, ClassName) \
XN_DECLARE_THREAD_SAFE_QUEUE_DECL(, Type, ClassName)
#endif //__XN_THREAD_SAFE_QUEUE_H__
|
