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// Copyright (C) 2020-2022 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/>.
// { dg-options "-std=gnu++2a -pthread" }
// { dg-add-options libatomic }
// { dg-require-effective-target c++2a }
// { dg-require-effective-target pthread }
// { dg-require-gthreads "" }
#include <stop_token>
#include <memory>
#include <testsuite_hooks.h>
void
test01()
{
std::stop_source ssrc;
std::stop_token stok = ssrc.get_token();
using F = void(*)();
std::unique_ptr<std::stop_callback<F>> pcb;
auto dereg = [&pcb] { pcb.reset(); };
std::stop_callback cb1(stok, dereg);
pcb = std::make_unique<std::stop_callback<F>>(stok, []{});
std::stop_callback cb2(stok, dereg);
// PR libstdc++/92895
// Making a stop request runs the callbacks. Whichever of cb1 and cb2
// runs first will destroy *pcb, which will try to unregister it.
// This recursive access to the shared stop state within a callback must
// work without deadlock.
ssrc.request_stop();
}
int main()
{
test01();
}
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