1// { dg-do run { target *-*-freebsd* *-*-dragonfly* *-*-netbsd* *-*-linux* *-*-gnu* *-*-solaris* *-*-cygwin *-*-darwin* powerpc-ibm-aix* } } 2// { dg-options " -std=gnu++11 -pthread" { target *-*-freebsd* *-*-dragonfly* *-*-netbsd* *-*-linux* *-*-gnu* powerpc-ibm-aix* } } 3// { dg-options " -std=gnu++11 -pthreads" { target *-*-solaris* } } 4// { dg-options " -std=gnu++11 " { target *-*-cygwin *-*-darwin* } } 5// { dg-require-cstdint "" } 6// { dg-require-gthreads "" } 7 8// Copyright (C) 2009-2015 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 <mutex> 27#include <thread> 28#include <testsuite_hooks.h> 29 30std::once_flag flag; 31int value = 0; 32 33struct Inc { void operator()() const { ++value; } }; 34 35struct Func 36{ 37 void operator()() const 38 { 39 Inc inc; 40 for (int i = 0; i < 10000; ++i) 41 std::call_once(flag, inc); 42 } 43}; 44 45int main() 46{ 47 Func f; 48 std::thread t1(f); 49 std::thread t2(f); 50 std::thread t3(f); 51 t1.join(); 52 t2.join(); 53 t3.join(); 54 VERIFY( value == 1 ); 55 return 0; 56} 57