ceph/src/boost/libs/thread/test/sync/futures/future/then_deferred_pass.cpp

   1 // Copyright (C) 2012-2013 Vicente Botet
   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 // <boost/thread/future.hpp>
   7
   8 // class future<R>
   9
  10 // template<typename F>
  11 // auto then(F&& func) -> future<decltype(func(*this))>;
  12
  13 #define BOOST_THREAD_VERSION 4
  14 //#define BOOST_THREAD_USES_LOG
  15 #define BOOST_THREAD_USES_LOG_THREAD_ID
  16 #include <boost/thread/detail/log.hpp>
  17
  18 #include <boost/thread/future.hpp>
  19 #include <boost/detail/lightweight_test.hpp>
  20 #include <cassert>
  21
  22 #if defined BOOST_THREAD_PROVIDES_FUTURE_CONTINUATION
  23
  24 #ifdef BOOST_MSVC
  25 #pragma warning(disable: 4127) // conditional expression is constant
  26 #endif
  27
  28 int p1()
  29 {
  30   BOOST_THREAD_LOG << "p1 < " << BOOST_THREAD_END_LOG;
  31   boost::this_thread::sleep_for(boost::chrono::milliseconds(500));
  32   BOOST_THREAD_LOG << "p1 >"  << BOOST_THREAD_END_LOG;
  33   return 1;
  34 }
  35
  36 int p2(boost::future<int> f)
  37 {
  38   assert(f.is_ready());
  39
  40   BOOST_THREAD_LOG << "p2 <" << &f << BOOST_THREAD_END_LOG;
  41   BOOST_TEST(f.valid());
  42   int i = f.get();
  43   boost::this_thread::sleep_for(boost::chrono::milliseconds(500));
  44   BOOST_THREAD_LOG << "p2 <" << &f << BOOST_THREAD_END_LOG;
  45   return 2 * i;
  46 }
  47
  48 void p3(boost::future<int> f)
  49 {
  50   assert(f.is_ready());
  51   BOOST_THREAD_LOG << "p3 <" << &f << BOOST_THREAD_END_LOG;
  52   BOOST_TEST(f.valid());
  53   int i = f.get();
  54   boost::this_thread::sleep_for(boost::chrono::milliseconds(500));
  55   BOOST_THREAD_LOG << "p3 <" << &f << " " <<i << BOOST_THREAD_END_LOG;
  56   return;
  57 }
  58
  59 int main()
  60 {
  61   BOOST_THREAD_LOG << BOOST_THREAD_END_LOG;
  62   {
  63     boost::future<int> f1 = boost::async(boost::launch::async, &p1);
  64     BOOST_TEST(f1.valid());
  65     boost::future<int> f2 = f1.then(boost::launch::deferred, &p2);
  66     BOOST_TEST(f2.valid());
  67     BOOST_TEST(! f1.valid());
  68     try
  69     {
  70       BOOST_TEST(f2.get()==2);
  71     }
  72     catch (std::exception& ex)
  73     {
  74       BOOST_THREAD_LOG << "ERRORRRRR "<<ex.what() << "" << BOOST_THREAD_END_LOG;
  75       BOOST_TEST(false);
  76     }
  77     catch (...)
  78     {
  79       BOOST_THREAD_LOG << " ERRORRRRR exception thrown" << BOOST_THREAD_END_LOG;
  80       BOOST_TEST(false);
  81     }
  82   }
  83   BOOST_THREAD_LOG << BOOST_THREAD_END_LOG;
  84   {
  85     boost::future<int> f1 = boost::async(boost::launch::async, &p1);
  86     BOOST_TEST(f1.valid());
  87     boost::future<void> f2 = f1.then(boost::launch::deferred, &p3);
  88     BOOST_TEST(f2.valid());
  89     try
  90     {
  91       f2.wait();
  92     }
  93     catch (std::exception& ex)
  94     {
  95       BOOST_THREAD_LOG << "ERRORRRRR "<<ex.what() << "" << BOOST_THREAD_END_LOG;
  96       BOOST_TEST(false);
  97     }
  98     catch (...)
  99     {
 100       BOOST_THREAD_LOG << " ERRORRRRR exception thrown" << BOOST_THREAD_END_LOG;
 101       BOOST_TEST(false);
 102     }
 103   }
 104   BOOST_THREAD_LOG << BOOST_THREAD_END_LOG;
 105   {
 106     boost::future<int> f2 = boost::async(p1).then(boost::launch::deferred, &p2);
 107     BOOST_TEST(f2.get()==2);
 108   }
 109   BOOST_THREAD_LOG << BOOST_THREAD_END_LOG;
 110   {
 111     boost::future<int> f1 = boost::async(p1);
 112     boost::future<int> f21 = f1.then(boost::launch::deferred, &p2);
 113     boost::future<int> f2= f21.then(boost::launch::deferred, &p2);
 114     BOOST_TEST(f2.get()==4);
 115   }
 116   BOOST_THREAD_LOG << BOOST_THREAD_END_LOG;
 117   {
 118     boost::future<int> f1 = boost::async(p1);
 119     boost::future<int> f2= f1.then(boost::launch::deferred, &p2).then(boost::launch::deferred, &p2);
 120     BOOST_TEST(f2.get()==4);
 121   }
 122   BOOST_THREAD_LOG << BOOST_THREAD_END_LOG;
 123   {
 124     boost::future<int> f2 = boost::async(p1).then(boost::launch::deferred, &p2).then(boost::launch::deferred, &p2);
 125     BOOST_TEST(f2.get()==4);
 126   }
 127
 128   return boost::report_errors();
 129 }
 130
 131 #else
 132
 133 int main()
 134 {
 135   return 0;
 136 }
 137 #endif