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 //
32 // Author: Mike Day (mdday@us.ibm.com)
33 //
34 // Modified By: Markus Mueller
35 // Ramnath Ravindran (Ramnath.Ravindran@compaq.com)
36 // David Eger (dteger@us.ibm.com)
37 // Amit K Arora, IBM (amita@in.ibm.com) for PEP#101
38 // Sean Keenan, Hewlett-Packard Company (sean.keenan@hp.com)
39 // Roger Kumpf, Hewlett-Packard Company (roger_kumpf@hp.com)
40 // David Dillard, VERITAS Software Corp.
41 // (david.dillard@veritas.com)
42 mike 1.2 // Aruran, IBM (ashanmug@in.ibm.com) for BUG# 3518
43 //
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44 mike 1.4.2.1 // Reworked By: Mike Brasher (m.brasher@inovadevelopment.com)
45 //
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46 mike 1.2 //%/////////////////////////////////////////////////////////////////////////////
47
48 #ifndef Pegasus_Mutex_h
49 #define Pegasus_Mutex_h
50
51 #include <Pegasus/Common/Config.h>
52 #include <Pegasus/Common/Linkage.h>
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53 mike 1.4.2.1 #include <Pegasus/Common/IPCExceptions.h>
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54 mike 1.4 #include <Pegasus/Common/Magic.h>
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55 mike 1.4.2.1 #include <Pegasus/Common/Threads.h>
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56 mike 1.2
57 PEGASUS_NAMESPACE_BEGIN
58
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59 mike 1.4.2.1 //==============================================================================
60 //
61 // MutexRep
62 //
63 //==============================================================================
64
65 #if defined(PEGASUS_HAVE_PTHREADS)
66 struct MutexRep
67 {
68 pthread_mutex_t mutex;
69 pthread_mutexattr_t attr;
70 pthread_t owner;
71 };
72 #endif
73
74 #if defined(PEGASUS_HAVE_WINDOWS_THREADS)
75 struct MutexRep
76 {
77 HANDLE handle;
78 HANDLE owner;
79 size_t count;
80 mike 1.4.2.1 };
81 #endif
82
83 //==============================================================================
84 //
85 // Mutex
86 //
87 //==============================================================================
88
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89 mike 1.2 class PEGASUS_COMMON_LINKAGE Mutex
90 {
91 public:
92
93 Mutex();
94
95 ~Mutex();
96
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97 mike 1.4.2.1 void lock(ThreadType caller = Threads::self());
98
99 void try_lock(ThreadType caller = Threads::self());
100
101 void timed_lock(Uint32 milliseconds, ThreadType caller = Threads::self());
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102 mike 1.2
103 void unlock();
104
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105 mike 1.4.2.1 ThreadType get_owner() { return _rep.owner; }
106
107 void set_owner(ThreadType caller) { _rep.owner = caller; }
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108 mike 1.2
109 private:
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110 mike 1.4.2.1 Mutex(const Mutex&);
111 Mutex& operator=(const Mutex&);
112
113
114 MutexRep _rep;
115 Magic<0x57D11485> _magic;
116
117 friend class Condition;
118 };
119
120 //==============================================================================
121 //
122 // AutoMutex
123 //
124 //==============================================================================
125
126 class PEGASUS_COMMON_LINKAGE AutoMutex
127 {
128 public:
129
130 AutoMutex(Mutex& mutex, Boolean autoLock = true) :
131 mike 1.4.2.1 _mutex(mutex), _locked(autoLock)
132 {
133 if (autoLock)
134 _mutex.lock();
135 }
136
137 ~AutoMutex()
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138 mike 1.2 {
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139 mike 1.4.2.1 try
140 {
141 if (_locked)
142 unlock();
143 }
144 catch (...)
145 {
146 // Do not propagate exception from destructor
147 }
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148 mike 1.2 }
149
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150 mike 1.4.2.1 void lock()
151 {
152 if (_locked)
153 throw AlreadyLocked(Threads::self());
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154 mike 1.2
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155 mike 1.4.2.1 _mutex.lock();
156 _locked = true;
157 }
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158 mike 1.4
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159 mike 1.4.2.1 void unlock()
160 {
161 if (!_locked)
162 throw Permission(Threads::self());
163
164 _mutex.unlock();
165 _locked = false;
166 }
167
168 Boolean isLocked() const
169 {
170 return _locked;
171 }
172
173 private:
174 AutoMutex(); // Unimplemented
175 AutoMutex(const AutoMutex& x); // Unimplemented
176 AutoMutex& operator=(const AutoMutex& x); // Unimplemented
177
178 Mutex& _mutex;
179 Boolean _locked;
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180 mike 1.2 };
181
182 PEGASUS_NAMESPACE_END
183
184 #endif /* Pegasus_Mutex_h */
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Mutex.h
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