libstdc++-v3/testsuite/30_threads/thread/cons/4.cc

   1 // { dg-do run }
   2 // { dg-options "-pthread"  }
   3 // { dg-require-effective-target c++11 }
   4 // { dg-require-effective-target pthread }
   5 // { dg-require-gthreads "" }
   6
   7 // Copyright (C) 2008-2020 Free Software Foundation, Inc.
   8 //
   9 // This file is part of the GNU ISO C++ Library.  This library is free
  10 // software; you can redistribute it and/or modify it under the
  11 // terms of the GNU General Public License as published by the
  12 // Free Software Foundation; either version 3, or (at your option)
  13 // any later version.
  14
  15 // This library is distributed in the hope that it will be useful,
  16 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 // GNU General Public License for more details.
  19
  20 // You should have received a copy of the GNU General Public License along
  21 // with this library; see the file COPYING3.  If not see
  22 // <http://www.gnu.org/licenses/>.
  23
  24
  25 #include <functional> // std::unary_function, std::ref, std::cref
  26 #include <thread>
  27 #include <system_error>
  28 #include <testsuite_hooks.h>
  29
  30 struct noncopyable : std::unary_function<std::thread::id&, void>
  31 {
  32   noncopyable() = default;
  33   ~noncopyable() = default;
  34   noncopyable(const noncopyable&) = delete;
  35   noncopyable& operator=(const noncopyable&) = delete;
  36   void operator()(std::thread::id& id) const
  37   {
  38     id = std::this_thread::get_id();
  39   }
  40 };
  41
  42 // same as 3, but function is noncopyable function object
  43 // thread variadic cons not copied when std::ref
  44 // thread variadic cons copied when not std::ref
  45 // thread variadic cons not copied when std::cref
  46 // thread variadic cons copied when not std::cref
  47 // no errors
  48 void test03()
  49 {
  50   try
  51     {
  52       std::thread::id t1_id1;
  53       noncopyable nc1;
  54       std::thread t1(std::ref(nc1), std::ref(t1_id1));
  55       std::thread::id t1_id2 = t1.get_id();
  56       VERIFY( t1.joinable() );
  57       t1.join();
  58       VERIFY( !t1.joinable() );
  59       VERIFY( t1_id1 == t1_id2 );
  60
  61       std::thread::id t2_id1;
  62       noncopyable nc2;
  63       std::thread t2(std::cref(nc2), std::ref(t2_id1));
  64       std::thread::id t2_id2 = t2.get_id();
  65       VERIFY( t2.joinable() );
  66       t2.join();
  67       VERIFY( !t2.joinable() );
  68       VERIFY( t2_id1 == t2_id2 );
  69     }
  70   catch(const std::system_error&)
  71     {
  72       VERIFY( false );
  73     }
  74   catch(...)
  75     {
  76       VERIFY( false );
  77     }
  78 }
  79
  80 int main()
  81 {
  82   test03();
  83   return 0;
  84 }