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