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git.ipfire.org Git - thirdparty/gcc.git/blob - libstdc++-v3/testsuite/30_threads/stop_token/stop_callback/deadlock-mt.cc
1 // Copyright (C) 2020-2021 Free Software Foundation, Inc.
3 // This file is part of the GNU ISO C++ Library. This library is free
4 // software; you can redistribute it and/or modify it under the
5 // terms of the GNU General Public License as published by the
6 // Free Software Foundation; either version 3, or (at your option)
9 // This library is distributed in the hope that it will be useful,
10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 // GNU General Public License for more details.
14 // You should have received a copy of the GNU General Public License along
15 // with this library; see the file COPYING3. If not see
16 // <http://www.gnu.org/licenses/>.
18 // { dg-options "-std=gnu++2a -pthread" }
19 // { dg-add-options libatomic }
20 // { dg-require-effective-target c++2a }
21 // { dg-require-effective-target pthread }
22 // { dg-require-gthreads "" }
26 #include <testsuite_hooks.h>
31 std::stop_source ssrc
;
32 std::stop_token stok
= ssrc
.get_token();
34 std::unique_ptr
<std::stop_callback
<F
>> pcb
;
35 auto dereg
= [&pcb
] { pcb
.reset(); };
36 std::stop_callback
cb1(stok
, dereg
);
37 pcb
= std::make_unique
<std::stop_callback
<F
>>(stok
, []{});
38 std::stop_callback
cb2(stok
, dereg
);
41 // Making a stop request runs the callbacks. Whichever of cb1 and cb2
42 // runs first will destroy *pcb, which will try to unregister it.
43 // This recursive access to the shared stop state within a callback must
44 // work without deadlock.