| 1 | //Copyright (c) 2006-2009 Emil Dotchevski and Reverge Studios, Inc. |
|---|---|
| 2 | |
| 3 | //Distributed under the Boost Software License, Version 1.0. (See accompanying |
| 4 | //file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
| 5 | |
| 6 | #include <boost/config.hpp> |
| 7 | |
| 8 | #if defined( BOOST_NO_EXCEPTIONS ) |
| 9 | # error This program requires exception handling. |
| 10 | #endif |
| 11 | |
| 12 | #include <boost/exception_ptr.hpp> |
| 13 | #include <boost/exception/get_error_info.hpp> |
| 14 | #include <boost/thread.hpp> |
| 15 | #include <boost/detail/atomic_count.hpp> |
| 16 | #include <boost/detail/lightweight_test.hpp> |
| 17 | |
| 18 | typedef boost::error_info<struct tag_answer,int> answer; |
| 19 | |
| 20 | int const thread_count = 100; |
| 21 | |
| 22 | boost::detail::atomic_count exc_count(0); |
| 23 | |
| 24 | struct |
| 25 | err: |
| 26 | virtual boost::exception, |
| 27 | virtual std::exception |
| 28 | { |
| 29 | err() |
| 30 | { |
| 31 | ++exc_count; |
| 32 | } |
| 33 | |
| 34 | err( err const & ) |
| 35 | { |
| 36 | ++exc_count; |
| 37 | } |
| 38 | |
| 39 | virtual |
| 40 | ~err() BOOST_NOEXCEPT_OR_NOTHROW |
| 41 | { |
| 42 | --exc_count; |
| 43 | } |
| 44 | |
| 45 | private: |
| 46 | |
| 47 | err & operator=( err const & ); |
| 48 | }; |
| 49 | |
| 50 | |
| 51 | class |
| 52 | future |
| 53 | { |
| 54 | public: |
| 55 | |
| 56 | future(): |
| 57 | ready_(false) |
| 58 | { |
| 59 | } |
| 60 | |
| 61 | void |
| 62 | set_exception( boost::exception_ptr const & e ) |
| 63 | { |
| 64 | boost::unique_lock<boost::mutex> lck(mux_); |
| 65 | exc_ = e; |
| 66 | ready_ = true; |
| 67 | cond_.notify_all(); |
| 68 | } |
| 69 | |
| 70 | void |
| 71 | get_exception() const |
| 72 | { |
| 73 | boost::unique_lock<boost::mutex> lck(mux_); |
| 74 | while( !ready_ ) |
| 75 | cond_.wait(m&: lck); |
| 76 | rethrow_exception(p: exc_); |
| 77 | } |
| 78 | |
| 79 | private: |
| 80 | |
| 81 | bool ready_; |
| 82 | boost::exception_ptr exc_; |
| 83 | mutable boost::mutex mux_; |
| 84 | mutable boost::condition_variable cond_; |
| 85 | }; |
| 86 | |
| 87 | void |
| 88 | producer( future & f ) |
| 89 | { |
| 90 | f.set_exception(boost::copy_exception(e: err() << answer(42))); |
| 91 | } |
| 92 | |
| 93 | void |
| 94 | consumer() |
| 95 | { |
| 96 | future f; |
| 97 | boost::thread thr(boost::bind(f: &producer, a1: boost::ref(t&: f))); |
| 98 | try |
| 99 | { |
| 100 | f.get_exception(); |
| 101 | } |
| 102 | catch( |
| 103 | err & e ) |
| 104 | { |
| 105 | int const * ans=boost::get_error_info<answer>(some_exception&: e); |
| 106 | BOOST_TEST(ans && *ans==42); |
| 107 | } |
| 108 | thr.join(); |
| 109 | } |
| 110 | |
| 111 | void |
| 112 | consume() |
| 113 | { |
| 114 | for( int i=0; i!=thread_count; ++i ) |
| 115 | consumer(); |
| 116 | } |
| 117 | |
| 118 | void |
| 119 | thread_test() |
| 120 | { |
| 121 | boost::thread_group grp; |
| 122 | for( int i=0; i!=thread_count; ++i ) |
| 123 | grp.create_thread(threadfunc: &consume); |
| 124 | grp.join_all(); |
| 125 | } |
| 126 | |
| 127 | void |
| 128 | simple_test() |
| 129 | { |
| 130 | boost::exception_ptr p = boost::copy_exception(e: err() << answer(42)); |
| 131 | try |
| 132 | { |
| 133 | rethrow_exception(p); |
| 134 | BOOST_TEST(false); |
| 135 | } |
| 136 | catch( |
| 137 | err & ) |
| 138 | { |
| 139 | } |
| 140 | catch( |
| 141 | ... ) |
| 142 | { |
| 143 | BOOST_TEST(false); |
| 144 | } |
| 145 | } |
| 146 | |
| 147 | int |
| 148 | main() |
| 149 | { |
| 150 | BOOST_TEST(++exc_count==1); |
| 151 | simple_test(); |
| 152 | thread_test(); |
| 153 | BOOST_TEST(!--exc_count); |
| 154 | return boost::report_errors(); |
| 155 | } |
| 156 |