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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// UNSUPPORTED: no-threads
// XFAIL: availability-synchronization_library-missing
// UNSUPPORTED: c++03, c++11, c++14, c++17
// ADDITIONAL_COMPILE_FLAGS: -Wno-private-header
#include <__stop_token/atomic_unique_lock.h>
#include <atomic>
#include <cassert>
#include <chrono>
#include <thread>
#include "make_test_thread.h"
#include "test_macros.h"
template <uint8_t LockBit>
void test() {
using Lock = std::__atomic_unique_lock<uint8_t, LockBit>;
// lock on constructor
{
std::atomic<uint8_t> state{0};
Lock l(state);
assert(l.__owns_lock());
}
// always give up locking
{
std::atomic<uint8_t> state{0};
Lock l(state, [](auto const&) { return true; });
assert(!l.__owns_lock());
}
// test overload that has custom state after lock
{
std::atomic<uint8_t> state{0};
auto neverGiveUpLocking = [](auto const&) { return false; };
auto stateAfter = [](auto) { return uint8_t{255}; };
Lock l(state, neverGiveUpLocking, stateAfter, std::memory_order_acq_rel);
assert(l.__owns_lock());
assert(state.load() == 255);
}
// lock and unlock
{
std::atomic<uint8_t> state{0};
Lock l(state);
assert(l.__owns_lock());
l.__unlock();
assert(!l.__owns_lock());
l.__lock();
assert(l.__owns_lock());
}
// lock blocking
{
std::atomic<uint8_t> state{0};
int i = 0;
Lock l1(state);
auto thread1 = support::make_test_thread([&] {
std::this_thread::sleep_for(std::chrono::milliseconds{10});
i = 5;
l1.__unlock();
});
Lock l2(state);
// l2's lock has to wait for l1's unlocking
assert(i == 5);
thread1.join();
}
}
int main(int, char**) {
test<1 << 0>();
test<1 << 1>();
test<1 << 2>();
test<1 << 3>();
test<1 << 4>();
test<1 << 5>();
test<1 << 6>();
test<1 << 7>();
return 0;
}
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