ceph/src/boost/libs/thread/test/sync/futures/packaged_task/get_future_pass.cpp

   1 //===----------------------------------------------------------------------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is dual licensed under the MIT and the University of Illinois Open
   6 // Source Licenses. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 // Copyright (C) 2011 Vicente J. Botet Escriba
  11 //
  12 //  Distributed under the Boost Software License, Version 1.0. (See accompanying
  13 //  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
  14
  15 // <boost/thread/future.hpp>
  16
  17 // class packaged_task<R>
  18
  19 // future<R> get_future();
  20
  21
  22 #define BOOST_THREAD_VERSION 4
  23 #if BOOST_THREAD_VERSION == 4
  24 #define BOOST_THREAD_DETAIL_SIGNATURE double()
  25 #else
  26 #define BOOST_THREAD_DETAIL_SIGNATURE double
  27 #endif
  28
  29 #include <boost/thread/future.hpp>
  30 #include <boost/detail/lightweight_test.hpp>
  31
  32 class A
  33 {
  34     long data_;
  35
  36 public:
  37     explicit A(long i) : data_(i) {}
  38
  39     long operator()() const {return data_;}
  40     long operator()(long i, long j) const {return data_ + i + j;}
  41 };
  42
  43 int main()
  44 {
  45   {
  46       boost::packaged_task<BOOST_THREAD_DETAIL_SIGNATURE> p(A(5));
  47       boost::future<double> f = BOOST_THREAD_MAKE_RV_REF(p.get_future());
  48       //p(3, 'a');
  49       p();
  50       BOOST_TEST(f.get() == 5.0);
  51   }
  52   {
  53       boost::packaged_task<BOOST_THREAD_DETAIL_SIGNATURE> p(A(5));
  54       boost::future<double> f = BOOST_THREAD_MAKE_RV_REF(p.get_future());
  55       try
  56       {
  57           f = BOOST_THREAD_MAKE_RV_REF(p.get_future());
  58           BOOST_TEST(false);
  59       }
  60       catch (const boost::future_error& e)
  61       {
  62           BOOST_TEST(e.code() ==  boost::system::make_error_code(boost::future_errc::future_already_retrieved));
  63       }
  64   }
  65   {
  66       boost::packaged_task<BOOST_THREAD_DETAIL_SIGNATURE> p;
  67       try
  68       {
  69           boost::future<double> f = BOOST_THREAD_MAKE_RV_REF(p.get_future());
  70           BOOST_TEST(false);
  71       }
  72       catch (const boost::future_error& e)
  73       {
  74           BOOST_TEST(e.code() ==  boost::system::make_error_code(boost::future_errc::no_state));
  75       }
  76   }
  77
  78   return boost::report_errors();
  79 }
  80