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// { dg-do run }
// { dg-options "-pthread" }
// { dg-require-effective-target c++11 }
// { dg-require-effective-target pthread }
// { dg-require-gthreads "" }
// Copyright (C) 2012-2018 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
// <http://www.gnu.org/licenses/>.
#include <vector>
#include <mutex>
#include <condition_variable>
#include <thread>
// PR libstdc++/54185
std::condition_variable* cond = nullptr;
std::mutex mx;
int started = 0;
int constexpr NUM_THREADS = 10;
void do_thread_a()
{
std::unique_lock<std::mutex> lock(mx);
if(++started >= NUM_THREADS)
{
cond->notify_all();
delete cond;
cond = nullptr;
}
else
cond->wait(lock);
}
int main(){
std::vector<std::thread> vec;
for(int j = 0; j < 1000; ++j)
{
started = 0;
cond = new std::condition_variable;
for (int i = 0; i < NUM_THREADS; ++i)
vec.emplace_back(&do_thread_a);
for (int i = 0; i < NUM_THREADS; ++i)
vec[i].join();
vec.clear();
}
}
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