libstdc++-v3/testsuite/30_threads/promise/members/at_thread_exit.cc

   1 // { dg-do run { target *-*-freebsd* *-*-dragonfly* *-*-netbsd* *-*-linux* *-*-gnu* *-*-solaris* *-*-cygwin *-*-rtems* *-*-darwin* powerpc-ibm-aix* } }
   2 // { dg-options "-pthread" { target *-*-freebsd* *-*-dragonfly* *-*-netbsd* *-*-linux* *-*-gnu* *-*-solaris* powerpc-ibm-aix* } }
   3 // { dg-require-effective-target c++11 }
   4 // { dg-require-cstdint "" }
   5 // { dg-require-gthreads "" }
   6 // { dg-require-atomic-builtins "" }
   7
   8 // Copyright (C) 2014-2016 Free Software Foundation, Inc.
   9 //
  10 // This file is part of the GNU ISO C++ Library.  This library is free
  11 // software; you can redistribute it and/or modify it under the
  12 // terms of the GNU General Public License as published by the
  13 // Free Software Foundation; either version 3, or (at your option)
  14 // any later version.
  15
  16 // This library is distributed in the hope that it will be useful,
  17 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 // GNU General Public License for more details.
  20
  21 // You should have received a copy of the GNU General Public License along
  22 // with this library; see the file COPYING3.  If not see
  23 // <http://www.gnu.org/licenses/>.
  24
  25
  26 #include <future>
  27 #include <testsuite_hooks.h>
  28
  29 int copies;
  30 int copies_cmp;
  31
  32 struct Obj
  33 {
  34   Obj() = default;
  35   Obj(const Obj&) { ++copies; }
  36 };
  37
  38 std::future<Obj> f1;
  39
  40 bool ready(std::future<Obj>& f)
  41 {
  42   return f.wait_for(std::chrono::milliseconds(1)) == std::future_status::ready;
  43 }
  44
  45 void test01()
  46 {
  47   bool test __attribute__((unused)) = true;
  48
  49   std::promise<Obj> p1;
  50   f1 = p1.get_future();
  51
  52   p1.set_value_at_thread_exit( {} );
  53
  54   copies_cmp = copies;
  55
  56   VERIFY( !ready(f1) );
  57 }
  58
  59 int main()
  60 {
  61   std::thread t{test01};
  62   t.join();
  63   VERIFY( ready(f1) );
  64   VERIFY( copies == copies_cmp );
  65 }