1 | #include <iostream>
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2 | #include <boost/thread.hpp>
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3 | #include <boost/filesystem.hpp>
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4 |
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5 | #define MULTI_THREAD
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6 |
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7 | int main()
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8 | {
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9 | boost::filesystem::path arg = L"test";
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10 |
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11 | if( !boost::filesystem::exists( arg ) )
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12 | boost::filesystem::create_symlink( L"C:\\", arg );
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13 |
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14 | auto core = [=]() -> boost::filesystem::path {
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15 | try {
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16 | return boost::filesystem::canonical( arg );
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17 | } catch( const std::exception& e ) {
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18 | std::cout << e.what() << std::endl;
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19 | return L"";
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20 | }
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21 | };
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22 |
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23 | boost::packaged_task<boost::filesystem::path> task1( core );
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24 | boost::packaged_task<boost::filesystem::path> task2( core );
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25 | boost::packaged_task<boost::filesystem::path> task3( core );
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26 | boost::packaged_task<boost::filesystem::path> task4( core );
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27 |
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28 | auto ret1 = task1.get_future();
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29 | auto ret2 = task2.get_future();
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30 | auto ret3 = task3.get_future();
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31 | auto ret4 = task4.get_future();
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32 |
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33 | #ifdef MULTI_THREAD
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34 | boost::thread( boost::move(task1) ).detach();
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35 | boost::thread( boost::move(task2) ).detach();
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36 | boost::thread( boost::move(task3) ).detach();
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37 | boost::thread( boost::move(task4) ).detach();
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38 | #else
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39 | task1(); task2(); task3(); task4();
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40 | #endif
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41 |
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42 | std::cout << ret1.get() << std::endl;
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43 | std::cout << ret2.get() << std::endl;
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44 | std::cout << ret3.get() << std::endl;
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45 | std::cout << ret4.get() << std::endl;
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46 |
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47 | return 0;
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48 | }
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