source: pacpusframework/trunk/3rd/apache-log4cxx/include/log4cxx/helpers/thread.h@ 52

Last change on this file since 52 was 2, checked in by sgosseli, 12 years ago

Add 3rd party libraries (log4cxx).
File size: 7.7 KB
Line 
1/*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18#ifndef _LOG4CXX_HELPERS_THREAD_H
19#define _LOG4CXX_HELPERS_THREAD_H
20
21#include <log4cxx/log4cxx.h>
22#include <log4cxx/helpers/pool.h>
23
24#if !defined(LOG4CXX_THREAD_FUNC)
25#if defined(_WIN32)
26#define LOG4CXX_THREAD_FUNC __stdcall
27#else
28#define LOG4CXX_THREAD_FUNC
29#endif
30#endif
31
32extern "C" {
33 typedef struct apr_thread_t apr_thread_t;
34}
35
36
37namespace log4cxx
38{
39 namespace helpers
40 {
41 class Pool;
42 class ThreadLocal;
43
44 typedef void* (LOG4CXX_THREAD_FUNC *Runnable)(apr_thread_t* thread, void* data);
45 /**
46 * This class implements an approximation of java.util.Thread.
47 */
48 class LOG4CXX_EXPORT Thread
49 {
50 public:
51 /**
52 * Create new instance.
53 */
54 Thread();
55 /**
56 * Destructor.
57 */
58 ~Thread();
59
60 /**
61 * Runs the specified method on a newly created thread.
62 */
63 void run(Runnable start, void* data);
64 void join();
65
66 inline bool isActive() { return thread != 0; }
67
68 /**
69 * Causes the currently executing thread to sleep for the
70 * specified number of milliseconds.
71 * @param millis milliseconds.
72 * @throws Interrupted Exception if the thread is interrupted.
73 */
74 static void sleep(int millis);
75 /**
76 * Sets interrupted status for current thread to true.
77 */
78 static void currentThreadInterrupt();
79 /**
80 * Sets interrupted status to true.
81 */
82 void interrupt();
83 /**
84 * Tests if the current thread has been interrupted and
85 * sets the interrupted status to false.
86 */
87 static bool interrupted();
88
89 bool isAlive();
90 bool isCurrentThread() const;
91 void ending();
92
93
94 private:
95 Pool p;
96 apr_thread_t* thread;
97 volatile unsigned int alive;
98 volatile unsigned int interruptedStatus;
99 Thread(const Thread&);
100 Thread& operator=(const Thread&);
101
102 /**
103 * This class is used to encapsulate the parameters to
104 * Thread::run when they are passed to Thread::launcher.
105 *
106 */
107 class LaunchPackage {
108 public:
109 /**
110 * Placement new to create LaunchPackage in specified pool.
111 * LaunchPackage needs to be dynamically allocated since
112 * since a stack allocated instance may go out of scope
113 * before thread is launched.
114 */
115 static void* operator new(size_t, Pool& p);
116 /**
117 * operator delete would be called if exception during construction.
118 */
119 static void operator delete(void*, Pool& p);
120 /**
121 * Create new instance.
122 */
123 LaunchPackage(Thread* thread, Runnable runnable, void* data);
124 /**
125 * Gets thread parameter.
126 * @return thread.
127 */
128 Thread* getThread() const;
129 /**
130 * Gets runnable parameter.
131 * @return runnable.
132 */
133 Runnable getRunnable() const;
134 /**
135 * gets data parameter.
136 * @return thread.
137 */
138 void* getData() const;
139 private:
140 LaunchPackage(const LaunchPackage&);
141 LaunchPackage& operator=(const LaunchPackage&);
142 Thread* thread;
143 Runnable runnable;
144 void* data;
145 };
146
147 /**
148 * This object atomically sets the specified memory location
149 * to non-zero on construction and to zero on destruction.
150 * Used to maintain Thread.alive.
151 */
152 class LaunchStatus {
153 public:
154 /*
155 * Construct new instance.
156 * @param p address of memory to set to non-zero on construction, zero on destruction.
157 */
158 LaunchStatus(volatile unsigned int* p);
159 /**
160 * Destructor.
161 */
162 ~LaunchStatus();
163 private:
164 LaunchStatus(const LaunchStatus&);
165 LaunchStatus& operator=(const LaunchStatus&);
166 volatile unsigned int* alive;
167 };
168
169 /**
170 * This method runs on the created thread and sets up thread-local storage
171 * used to keep the reference to the corresponding Thread object and
172 * is responsible for maintaining Thread.alive.
173 */
174 static void* LOG4CXX_THREAD_FUNC launcher(apr_thread_t* thread, void* data);
175 /**
176 * Get a key to the thread local storage used to hold the reference to
177 * the corresponding Thread object.
178 */
179 static ThreadLocal& getThreadLocal();
180 };
181 } // namespace helpers
182} // namespace log4cxx
183
184#endif //_LOG4CXX_HELPERS_THREAD_H
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