Boost 类库是个开源的类库,传说中的准标准库这下将会是我阅读Boost 多线程源代码的心得.
费话少说,在使用BOOST的多线程我们都会引入boost/thread.hpp这一个文件好我们先找到这个文件将它打开
1
// Copyright (C) 2001-2003
2// William E. Kempf
3// (C) Copyright 2008 Anthony Williams
4//
5// Distributed under the Boost Software License, Version 1.0. (See accompanying
6// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
7
8// See www.boost.org/libs/thread for documentation.
9
10#if !defined(BOOST_THREAD_WEK01082003_HPP)
11#define BOOST_THREAD_WEK01082003_HPP
12
13#include <boost/thread/thread.hpp>
14#include <boost/thread/condition_variable.hpp>
15#include <boost/thread/exceptions.hpp>
16#include <boost/thread/mutex.hpp>
17#include <boost/thread/once.hpp>
18#include <boost/thread/recursive_mutex.hpp>
19#include <boost/thread/tss.hpp>
20#include <boost/thread/thread_time.hpp>
21#include <boost/thread/locks.hpp>
22#include <boost/thread/shared_mutex.hpp>
23#include <boost/thread/barrier.hpp>
24
25#endif 从这些代码可以看出,boost/thread.hpp只是引用文件而已,看不到任何世界的C++代码,
我们顺着这些#include一个一个打开
先是#include <boost/thread/thread.hpp>
1#ifndef BOOST_THREAD_THREAD_HPP
2#define BOOST_THREAD_THREAD_HPP
3
4// thread.hpp
5//
6// (C) Copyright 2007-8 Anthony Williams
7//
8// Distributed under the Boost Software License, Version 1.0. (See
9// accompanying file LICENSE_1_0.txt or copy at
10// http://www.boost.org/LICENSE_1_0.txt)
11
12#include <boost/thread/detail/platform.hpp>
13
14#if defined(BOOST_THREAD_PLATFORM_WIN32)
15#include <boost/thread/win32/thread_data.hpp>
16#elif defined(BOOST_THREAD_PLATFORM_PTHREAD)
17#include <boost/thread/pthread/thread_data.hpp>
18#else
19#error "Boost threads unavailable on this platform"
20#endif
21
22#include <boost/thread/detail/thread.hpp>
23
24
25#endif
26 明显这里是一个对不同平台作出的定义,
boost/thread/detail/是一个基本由宏定义组成的HPP文件,我们站且跳过
我们以WIN32入手...
#include <boost/thread/win32/thread_data.hpp>
1#ifndef BOOST_THREAD_PTHREAD_THREAD_DATA_HPP
2#define BOOST_THREAD_PTHREAD_THREAD_DATA_HPP
3// Distributed under the Boost Software License, Version 1.0. (See
4// accompanying file LICENSE_1_0.txt or copy at
5// http://www.boost.org/LICENSE_1_0.txt)
6// (C) Copyright 2007 Anthony Williams
7
8#include <boost/thread/detail/config.hpp>
9#include <boost/thread/exceptions.hpp>
10#include <boost/shared_ptr.hpp>
11#include <boost/enable_shared_from_this.hpp>
12#include <boost/thread/mutex.hpp>
13#include <boost/optional.hpp>
14#include <pthread.h>
15#include "condition_variable_fwd.hpp"
16
17#include <boost/config/abi_prefix.hpp>
18
19namespace boost
20
{
21
class thread;
22
23 namespace detail
24
{
25 struct thread_exit_callback_node;
26 struct tss_data_node;
27
28 struct thread_data_base;
29 typedef boost::shared_ptr<thread_data_base> thread_data_ptr;
30
31 struct BOOST_THREAD_DECL thread_data_base:
32 enable_shared_from_this<thread_data_base>
33 {
34 thread_data_ptr self;
35 pthread_t thread_handle;
36 boost::mutex data_mutex;
37 boost::condition_variable done_condition;
38 boost::mutex sleep_mutex;
39 boost::condition_variable sleep_condition;
40 bool done;
41 bool join_started;
42 bool joined;
43 boost::detail::thread_exit_callback_node* thread_exit_callbacks;
44 boost::detail::tss_data_node* tss_data;
45 bool interrupt_enabled;
46 bool interrupt_requested;
47 pthread_cond_t* current_cond;
48
49 thread_data_base():
50 done(false),join_started(false),joined(false),
51 thread_exit_callbacks(0),tss_data(0),
52 interrupt_enabled(true),
53 interrupt_requested(false),
54 current_cond(0)
55 {}
56 virtual ~thread_data_base();
57
58 typedef pthread_t native_handle_type;
59
60 virtual void run()=0;
61
};
62
63 BOOST_THREAD_DECL thread_data_base* get_current_thread_data();
64
65 class interruption_checker
66 {
67 thread_data_base* const thread_info;
68
69 void check_for_interruption()
70 {
71 if(thread_info->interrupt_requested)
72 {
73 thread_info->interrupt_requested=false;
74 throw thread_interrupted();
75 }
76 }
77
78 void operator=(interruption_checker&);
79 public:
80 explicit interruption_checker(pthread_cond_t* cond):
81 thread_info(detail::get_current_thread_data())
82 {
83 if(thread_info && thread_info->interrupt_enabled)
84 {
85 lock_guard<mutex> guard(thread_info->data_mutex);
86 check_for_interruption();
87 thread_info->current_cond=cond;
88 }
89 }
90 ~interruption_checker()
91 {
92 if(thread_info && thread_info->interrupt_enabled)
93 {
94 lock_guard<mutex> guard(thread_info->data_mutex);
95 thread_info->current_cond=NULL;
96 check_for_interruption();
97 }
98 }
99 };
100 }
101
102 namespace this_thread
103 {
104 void BOOST_THREAD_DECL yield();
105
106 void BOOST_THREAD_DECL sleep(system_time const& abs_time);
107
108 template<typename TimeDuration>
109 inline void sleep(TimeDuration const& rel_time)
110 {
111 this_thread::sleep(get_system_time()+rel_time);
112 }
113 }
114
}
115
116#include <boost/config/abi_suffix.hpp>
117
118#endif
水平有限....貌似停留在只能自己看懂....
posted on 2009-05-09 20:43
^乔乔^ 阅读(1946)
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