// { dg-do run }
// { dg-options "-pthread" }
// { dg-require-effective-target c++11 }
// { dg-require-effective-target pthread }
// { dg-require-cstdint "" }
// { dg-require-gthreads "" }
// Copyright (C) 2009-2017 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING3. If not see
// .
#include
#include
#include
std::once_flag flag;
int value = 0;
struct Inc { void operator()() const { ++value; } };
struct Func
{
void operator()() const
{
Inc inc;
for (int i = 0; i < 10000; ++i)
std::call_once(flag, inc);
}
};
int main()
{
Func f;
std::thread t1(f);
std::thread t2(f);
std::thread t3(f);
t1.join();
t2.join();
t3.join();
VERIFY( value == 1 );
return 0;
}