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// Copyright (C) 2019-2023 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" }
// { dg-do run { target c++2a } }
// { dg-add-options libatomic }
// { dg-additional-options "-pthread" { target pthread } }
// { dg-require-gthreads "" }
#include <thread>
#include <chrono>
#include <atomic>
#include <testsuite_hooks.h>
using namespace std::literals;
//------------------------------------------------------
void test_no_stop_token()
{
// test the basic jthread API (not taking stop_token arg)
VERIFY(std::jthread::hardware_concurrency() == std::thread::hardware_concurrency());
std::stop_token stoken;
VERIFY(!stoken.stop_possible());
{
std::jthread::id t1ID{std::this_thread::get_id()};
std::atomic<bool> t1AllSet{false};
std::jthread t1([&t1ID, &t1AllSet] {
t1ID = std::this_thread::get_id();
t1AllSet.store(true);
for (int c='9'; c>='0'; --c) {
std::this_thread::sleep_for(222ms);
}
});
for (int i=0; !t1AllSet.load(); ++i) {
std::this_thread::sleep_for(10ms);
}
VERIFY(t1.joinable());
VERIFY(t1ID == t1.get_id());
stoken = t1.get_stop_token();
VERIFY(!stoken.stop_requested());
}
VERIFY(stoken.stop_requested());
}
//------------------------------------------------------
void test_stop_token()
{
// test the basic thread API (taking stop_token arg)
std::stop_source ssource;
std::stop_source origsource;
VERIFY(ssource.stop_possible());
VERIFY(!ssource.stop_requested());
{
std::jthread::id t1ID{std::this_thread::get_id()};
std::atomic<bool> t1AllSet{false};
std::atomic<bool> t1done{false};
std::jthread t1([&t1ID, &t1AllSet, &t1done] (std::stop_token st) {
// check some values of the started thread:
t1ID = std::this_thread::get_id();
t1AllSet.store(true);
for (int i=0; !st.stop_requested(); ++i) {
std::this_thread::sleep_for(100ms);
}
t1done.store(true);
},
ssource.get_token());
for (int i=0; !t1AllSet.load(); ++i) {
std::this_thread::sleep_for(10ms);
}
// and check all values:
VERIFY(t1.joinable());
VERIFY(t1ID == t1.get_id());
std::this_thread::sleep_for(470ms);
origsource = std::move(ssource);
ssource = t1.get_stop_source();
VERIFY(!ssource.stop_requested());
auto ret = ssource.request_stop();
VERIFY(ret);
ret = ssource.request_stop();
VERIFY(!ret);
VERIFY(ssource.stop_requested());
VERIFY(!t1done.load());
VERIFY(!origsource.stop_requested());
std::this_thread::sleep_for(470ms);
origsource.request_stop();
}
VERIFY(origsource.stop_requested());
VERIFY(ssource.stop_requested());
}
//------------------------------------------------------
void test_join()
{
std::stop_source ssource;
VERIFY(ssource.stop_possible());
{
std::jthread t1([](std::stop_token stoken) {
for (int i=0; !stoken.stop_requested(); ++i) {
std::this_thread::sleep_for(100ms);
}
});
ssource = t1.get_stop_source();
std::jthread t2([ssource] () mutable {
for (int i=0; i < 10; ++i) {
std::this_thread::sleep_for(70ms);
}
ssource.request_stop();
});
// wait for all thread to finish:
t2.join();
VERIFY(!t2.joinable());
VERIFY(t1.joinable());
t1.join();
VERIFY(!t1.joinable());
}
}
//------------------------------------------------------
void test_detach()
{
std::stop_source ssource;
VERIFY(ssource.stop_possible());
std::atomic<bool> t1FinallyInterrupted{false};
{
std::jthread t0;
std::jthread::id t1ID{std::this_thread::get_id()};
bool t1IsInterrupted;
std::stop_token t1InterruptToken;
std::atomic<bool> t1AllSet{false};
std::jthread t1([&t1ID, &t1IsInterrupted, &t1InterruptToken, &t1AllSet, &t1FinallyInterrupted]
(std::stop_token stoken) {
// check some values of the started thread:
t1ID = std::this_thread::get_id();
t1InterruptToken = stoken;
t1IsInterrupted = stoken.stop_requested();
VERIFY(stoken.stop_possible());
VERIFY(!stoken.stop_requested());
t1AllSet.store(true);
for (int i=0; !stoken.stop_requested(); ++i) {
std::this_thread::sleep_for(100ms);
}
t1FinallyInterrupted.store(true);
});
for (int i=0; !t1AllSet.load(); ++i) {
std::this_thread::sleep_for(10ms);
}
VERIFY(!t0.joinable());
VERIFY(t1.joinable());
VERIFY(t1ID == t1.get_id());
VERIFY(t1IsInterrupted == false);
VERIFY(t1InterruptToken == t1.get_stop_source().get_token());
ssource = t1.get_stop_source();
VERIFY(t1InterruptToken.stop_possible());
VERIFY(!t1InterruptToken.stop_requested());
t1.detach();
VERIFY(!t1.joinable());
}
VERIFY(!t1FinallyInterrupted.load());
ssource.request_stop();
VERIFY(ssource.stop_requested());
for (int i=0; !t1FinallyInterrupted.load() && i < 100; ++i) {
std::this_thread::sleep_for(100ms);
}
VERIFY(t1FinallyInterrupted.load());
}
//------------------------------------------------------
void test_move_assignment()
{
std::jthread thread1([]{});
std::jthread thread2([]{});
const auto id2 = thread2.get_id();
const auto ssource2 = thread2.get_stop_source();
thread1 = std::move(thread2);
VERIFY(thread1.get_id() == id2);
VERIFY(thread2.get_id() == std::jthread::id());
VERIFY(thread1.get_stop_source() == ssource2);
VERIFY(!thread2.get_stop_source().stop_possible());
}
int main()
{
std::set_terminate([](){
VERIFY(false);
});
test_no_stop_token();
test_stop_token();
test_join();
test_detach();
test_move_assignment();
}
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