1 karl 1.3 //%2006////////////////////////////////////////////////////////////////////////
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2 mike 1.2 //
3 // Copyright (c) 2000, 2001, 2002 BMC Software; Hewlett-Packard Development
4 // Company, L.P.; IBM Corp.; The Open Group; Tivoli Systems.
5 // Copyright (c) 2003 BMC Software; Hewlett-Packard Development Company, L.P.;
6 // IBM Corp.; EMC Corporation, The Open Group.
7 // Copyright (c) 2004 BMC Software; Hewlett-Packard Development Company, L.P.;
8 // IBM Corp.; EMC Corporation; VERITAS Software Corporation; The Open Group.
9 // Copyright (c) 2005 Hewlett-Packard Development Company, L.P.; IBM Corp.;
10 // EMC Corporation; VERITAS Software Corporation; The Open Group.
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11 karl 1.3 // Copyright (c) 2006 Hewlett-Packard Development Company, L.P.; IBM Corp.;
12 // EMC Corporation; Symantec Corporation; The Open Group.
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13 mike 1.2 //
14 // Permission is hereby granted, free of charge, to any person obtaining a copy
15 // of this software and associated documentation files (the "Software"), to
16 // deal in the Software without restriction, including without limitation the
17 // rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
18 // sell copies of the Software, and to permit persons to whom the Software is
19 // furnished to do so, subject to the following conditions:
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20 karl 1.3 //
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21 mike 1.2 // THE ABOVE COPYRIGHT NOTICE AND THIS PERMISSION NOTICE SHALL BE INCLUDED IN
22 // ALL COPIES OR SUBSTANTIAL PORTIONS OF THE SOFTWARE. THE SOFTWARE IS PROVIDED
23 // "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT
24 // LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
25 // PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
26 // HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
27 // ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
29 //
30 //==============================================================================
31 //
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32 mike 1.4.2.4 // Author: Mike Brasher (m.brasher@inovadevelopment.com)
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33 mike 1.4.2.1 //
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34 mike 1.2 //%/////////////////////////////////////////////////////////////////////////////
35
36 #ifndef Pegasus_Mutex_h
37 #define Pegasus_Mutex_h
38
39 #include <Pegasus/Common/Config.h>
40 #include <Pegasus/Common/Linkage.h>
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41 mike 1.4.2.1 #include <Pegasus/Common/IPCExceptions.h>
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42 mike 1.4 #include <Pegasus/Common/Magic.h>
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43 mike 1.4.2.1 #include <Pegasus/Common/Threads.h>
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44 mike 1.2
45 PEGASUS_NAMESPACE_BEGIN
46
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47 mike 1.4.2.1 //==============================================================================
48 //
49 // MutexRep
50 //
51 //==============================================================================
52
53 #if defined(PEGASUS_HAVE_PTHREADS)
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54 mike 1.4.2.2 typedef pthread_mutex_t MutexType;
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55 mike 1.4.2.1 struct MutexRep
56 {
57 pthread_mutex_t mutex;
58 pthread_mutexattr_t attr;
59 };
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60 mike 1.4.2.2 inline void mutex_lock(MutexType* mutex) { pthread_mutex_lock(mutex); }
61 inline void mutex_unlock(MutexType* mutex) { pthread_mutex_unlock(mutex); }
62 # define PEGASUS_MUTEX_INITIALIZER PTHREAD_MUTEX_INITIALIZER
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63 mike 1.4.2.1 #endif
64
65 #if defined(PEGASUS_HAVE_WINDOWS_THREADS)
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66 mike 1.4.2.2 typedef HANDLE MutexType;
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67 mike 1.4.2.1 struct MutexRep
68 {
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69 mike 1.4.2.3 MutexType handle;
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70 mike 1.4.2.1 size_t count;
71 };
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72 mike 1.4.2.3 inline void mutex_lock(MutexType* m) { WaitForSingleObject(*m, INFINITE); }
73 inline void mutex_unlock(MutexType* m) { ReleaseMutex(*m); }
74 # define PEGASUS_MUTEX_INITIALIZER (CreateMutex(NULL, FALSE, NULL))
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75 mike 1.4.2.1 #endif
76
77 //==============================================================================
78 //
79 // Mutex
80 //
81 //==============================================================================
82
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83 mike 1.2 class PEGASUS_COMMON_LINKAGE Mutex
84 {
85 public:
86
87 Mutex();
88
89 ~Mutex();
90
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91 mike 1.4.2.4 void lock();
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92 mike 1.4.2.1
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93 mike 1.4.2.4 void try_lock();
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94 mike 1.4.2.1
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95 mike 1.4.2.4 void timed_lock(Uint32 milliseconds);
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96 mike 1.2
97 void unlock();
98
99 private:
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100 mike 1.4.2.1 Mutex(const Mutex&);
101 Mutex& operator=(const Mutex&);
102
103
104 MutexRep _rep;
105 Magic<0x57D11485> _magic;
106
107 friend class Condition;
108 };
109
110 //==============================================================================
111 //
112 // AutoMutex
113 //
114 //==============================================================================
115
116 class PEGASUS_COMMON_LINKAGE AutoMutex
117 {
118 public:
119
120 AutoMutex(Mutex& mutex, Boolean autoLock = true) :
121 mike 1.4.2.1 _mutex(mutex), _locked(autoLock)
122 {
123 if (autoLock)
124 _mutex.lock();
125 }
126
127 ~AutoMutex()
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128 mike 1.2 {
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129 mike 1.4.2.1 try
130 {
131 if (_locked)
132 unlock();
133 }
134 catch (...)
135 {
136 // Do not propagate exception from destructor
137 }
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138 mike 1.2 }
139
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140 mike 1.4.2.1 void lock()
141 {
142 if (_locked)
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143 mike 1.4.2.4 throw AlreadyLocked(ThreadType());
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144 mike 1.2
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145 mike 1.4.2.1 _mutex.lock();
146 _locked = true;
147 }
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148 mike 1.4
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149 mike 1.4.2.1 void unlock()
150 {
151 if (!_locked)
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152 mike 1.4.2.4 throw Permission(ThreadType());
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153 mike 1.4.2.1
154 _mutex.unlock();
155 _locked = false;
156 }
157
158 Boolean isLocked() const
159 {
160 return _locked;
161 }
162
163 private:
164 AutoMutex(); // Unimplemented
165 AutoMutex(const AutoMutex& x); // Unimplemented
166 AutoMutex& operator=(const AutoMutex& x); // Unimplemented
167
168 Mutex& _mutex;
169 Boolean _locked;
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170 mike 1.2 };
171
172 PEGASUS_NAMESPACE_END
173
174 #endif /* Pegasus_Mutex_h */
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