libstdc++-v3/testsuite/30_threads/promise/members/set_value3.cc

   1 // { dg-do run { target *-*-freebsd* *-*-netbsd* *-*-linux* *-*-gnu* *-*-solaris* *-*-cygwin *-*-darwin* powerpc-ibm-aix* } }
   2 // { dg-options " -std=gnu++0x -pthread" { target *-*-freebsd* *-*-netbsd* *-*-linux* *-*-gnu* powerpc-ibm-aix* } }
   3 // { dg-options " -std=gnu++0x -pthreads" { target *-*-solaris* } }
   4 // { dg-options " -std=gnu++0x " { target *-*-cygwin *-*-darwin* } }
   5 // { dg-require-cstdint "" }
   6 // { dg-require-gthreads "" }
   7 // { dg-require-atomic-builtins "" }
   8
   9 // Copyright (C) 2009-2013 Free Software Foundation, Inc.
  10 //
  11 // This file is part of the GNU ISO C++ Library.  This library is free
  12 // software; you can redistribute it and/or modify it under the
  13 // terms of the GNU General Public License as published by the
  14 // Free Software Foundation; either version 3, or (at your option)
  15 // any later version.
  16
  17 // This library is distributed in the hope that it will be useful,
  18 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 // GNU General Public License for more details.
  21
  22 // You should have received a copy of the GNU General Public License along
  23 // with this library; see the file COPYING3.  If not see
  24 // <http://www.gnu.org/licenses/>.
  25
  26 #include <future>
  27 #include <testsuite_hooks.h>
  28
  29
  30 // Test promise::set_value() for deadlock by checking if the state is ready
  31 // during construction and destruction of the associated state.
  32
  33 struct tester
  34 {
  35   tester(int);
  36   tester(const tester&);
  37   tester() = delete;
  38   tester& operator=(const tester&);
  39 };
  40
  41 std::promise<tester> pglobal;
  42 std::future<tester> fglobal = pglobal.get_future();
  43
  44 auto delay = std::chrono::milliseconds(1);
  45
  46 tester::tester(int)
  47 {
  48   bool test __attribute__((unused)) = true;
  49   VERIFY (fglobal.wait_for(delay) == std::future_status::timeout);
  50 }
  51
  52 tester::tester(const tester&)
  53 {
  54   bool test __attribute__((unused)) = true;
  55   // if this copy happens while a mutex is locked next line could deadlock:
  56   VERIFY (fglobal.wait_for(delay) == std::future_status::timeout);
  57 }
  58
  59 tester& tester::operator=(const tester&)
  60 {
  61   bool test __attribute__((unused)) = true;
  62   // if this copy happens while a mutex is locked next line could deadlock:
  63   VERIFY (fglobal.wait_for(delay) == std::future_status::timeout);
  64   return *this;
  65 }
  66
  67 void test01()
  68 {
  69   bool test __attribute__((unused)) = true;
  70
  71   pglobal.set_value( tester(1) );
  72
  73   VERIFY (fglobal.wait_for(delay) == std::future_status::ready);
  74 }
  75
  76 int main()
  77 {
  78   test01();
  79   return 0;
  80 }