| //===----------------------------------------------------------------------===// |
| // |
| // 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: libcpp-has-no-threads |
| // XFAIL: c++03 |
| // XFAIL: !non-lockfree-atomics |
| |
| // This test requires the dylib support introduced in D68480, which shipped in macOS 11.0. |
| // XFAIL: use_system_cxx_lib && target={{.+}}-apple-macosx10.{{9|10|11|12|13|14|15}} |
| |
| // <atomic> |
| |
| // template<class T> |
| // void |
| // atomic_wait(const volatile atomic<T>*, atomic<T>::value_type); |
| // |
| // template<class T> |
| // void |
| // atomic_wait(const atomic<T>*, atomic<T>::value_type); |
| |
| #include <atomic> |
| #include <type_traits> |
| #include <cassert> |
| #include <thread> |
| |
| #include "make_test_thread.h" |
| #include "test_macros.h" |
| #include "atomic_helpers.h" |
| |
| template <class T> |
| struct TestFn { |
| void operator()() const { |
| typedef std::atomic<T> A; |
| { |
| A t(T(1)); |
| assert(std::atomic_load(&t) == T(1)); |
| std::atomic_wait(&t, T(0)); |
| std::thread t1 = support::make_test_thread([&]() { |
| std::atomic_store(&t, T(3)); |
| std::atomic_notify_one(&t); |
| }); |
| std::atomic_wait(&t, T(1)); |
| assert(std::atomic_load(&t) == T(3)); |
| t1.join(); |
| } |
| { |
| volatile A vt(T(2)); |
| assert(std::atomic_load(&vt) == T(2)); |
| std::atomic_wait(&vt, T(1)); |
| std::thread t2 = support::make_test_thread([&]() { |
| std::atomic_store(&vt, T(4)); |
| std::atomic_notify_one(&vt); |
| }); |
| std::atomic_wait(&vt, T(2)); |
| assert(std::atomic_load(&vt) == T(4)); |
| t2.join(); |
| } |
| } |
| }; |
| |
| int main(int, char**) { |
| TestEachAtomicType<TestFn>()(); |
| |
| return 0; |
| } |