[29] | 1 | // Copyright (C) 2001-2003 |
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| 2 | // William E. Kempf |
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| 3 | // |
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| 4 | // Distributed under the Boost Software License, Version 1.0. (See accompanying |
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| 5 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
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| 6 | |
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| 7 | #include <boost/thread/mutex.hpp> |
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| 8 | #include <boost/thread/condition.hpp> |
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| 9 | #include <boost/thread/thread.hpp> |
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| 10 | #include <boost/thread/xtime.hpp> |
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| 11 | #include <iostream> |
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| 12 | |
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| 13 | #if defined(BOOST_HAS_WINTHREADS) |
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| 14 | # include <windows.h> |
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| 15 | # include <process.h> |
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| 16 | #endif |
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| 17 | |
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| 18 | enum game_state |
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| 19 | { |
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| 20 | START, |
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| 21 | PLAYER_A, |
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| 22 | PLAYER_B, |
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| 23 | GAME_OVER, |
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| 24 | ONE_PLAYER_GONE, |
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| 25 | BOTH_PLAYERS_GONE |
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| 26 | }; |
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| 27 | |
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| 28 | int state; |
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| 29 | boost::mutex mutex; |
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| 30 | boost::condition cond; |
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| 31 | |
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| 32 | char* player_name(int state) |
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| 33 | { |
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| 34 | if (state == PLAYER_A) |
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| 35 | return "PLAYER-A"; |
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| 36 | if (state == PLAYER_B) |
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| 37 | return "PLAYER-B"; |
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| 38 | throw "bad player"; |
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| 39 | return 0; |
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| 40 | } |
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| 41 | |
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| 42 | void player(void* param) |
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| 43 | { |
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| 44 | boost::mutex::scoped_lock lock(mutex); |
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| 45 | |
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| 46 | int active = (int)param; |
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| 47 | int other = active == PLAYER_A ? PLAYER_B : PLAYER_A; |
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| 48 | |
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| 49 | while (state < GAME_OVER) |
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| 50 | { |
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| 51 | std::cout << player_name(active) << ": Play." << std::endl; |
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| 52 | state = other; |
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| 53 | cond.notify_all(); |
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| 54 | do |
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| 55 | { |
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| 56 | cond.wait(lock); |
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| 57 | if (state == other) |
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| 58 | { |
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| 59 | std::cout << "---" << player_name(active) |
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| 60 | << ": Spurious wakeup!" << std::endl; |
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| 61 | } |
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| 62 | } while (state == other); |
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| 63 | } |
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| 64 | |
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| 65 | ++state; |
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| 66 | std::cout << player_name(active) << ": Gone." << std::endl; |
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| 67 | cond.notify_all(); |
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| 68 | } |
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| 69 | |
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| 70 | struct thread_adapt |
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| 71 | { |
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| 72 | thread_adapt(void (*func)(void*), void* param) |
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| 73 | : _func(func), _param(param) |
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| 74 | { |
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| 75 | } |
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| 76 | int operator()() const |
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| 77 | { |
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| 78 | _func(_param); |
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| 79 | return 0; |
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| 80 | } |
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| 81 | |
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| 82 | void (*_func)(void*); |
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| 83 | void* _param; |
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| 84 | }; |
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| 85 | |
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| 86 | class thread_adapter |
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| 87 | { |
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| 88 | public: |
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| 89 | thread_adapter(void (*func)(void*), void* param) |
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| 90 | : _func(func), _param(param) |
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| 91 | { |
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| 92 | } |
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| 93 | void operator()() const { _func(_param); } |
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| 94 | private: |
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| 95 | void (*_func)(void*); |
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| 96 | void* _param; |
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| 97 | }; |
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| 98 | |
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| 99 | int main(int argc, char* argv[]) |
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| 100 | { |
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| 101 | state = START; |
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| 102 | |
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| 103 | boost::thread thrda(thread_adapter(&player, (void*)PLAYER_A)); |
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| 104 | boost::thread thrdb(thread_adapter(&player, (void*)PLAYER_B)); |
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| 105 | |
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| 106 | boost::xtime xt; |
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| 107 | boost::xtime_get(&xt, boost::TIME_UTC); |
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| 108 | xt.sec += 1; |
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| 109 | boost::thread::sleep(xt); |
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| 110 | { |
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| 111 | boost::mutex::scoped_lock lock(mutex); |
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| 112 | std::cout << "---Noise ON..." << std::endl; |
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| 113 | } |
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| 114 | |
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| 115 | for (int i = 0; i < 1000000; ++i) |
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| 116 | cond.notify_all(); |
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| 117 | |
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| 118 | { |
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| 119 | boost::mutex::scoped_lock lock(mutex); |
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| 120 | std::cout << "---Noise OFF..." << std::endl; |
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| 121 | state = GAME_OVER; |
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| 122 | cond.notify_all(); |
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| 123 | do |
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| 124 | { |
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| 125 | cond.wait(lock); |
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| 126 | } while (state != BOTH_PLAYERS_GONE); |
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| 127 | } |
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| 128 | |
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| 129 | std::cout << "GAME OVER" << std::endl; |
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| 130 | |
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| 131 | thrda.join(); |
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| 132 | thrdb.join(); |
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| 133 | |
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| 134 | return 0; |
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| 135 | } |
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