Revert "[libc] Use best-fit binary trie to make malloc logarithmic" (#117065)
[llvm-project.git] / libcxx / test / std / thread / futures / futures.shared_future / wait_until.pass.cpp
blob904735f5176ae6fa63fc942e0fc147f45a18e5f3
1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // UNSUPPORTED: no-threads
10 // UNSUPPORTED: c++03
12 // <future>
14 // class shared_future<R>
16 // template <class Clock, class Duration>
17 // future_status
18 // wait_until(const chrono::time_point<Clock, Duration>& abs_time) const;
20 #include <atomic>
21 #include <cassert>
22 #include <chrono>
23 #include <future>
25 #include "make_test_thread.h"
26 #include "test_macros.h"
28 enum class WorkerThreadState { Uninitialized, AllowedToRun, Exiting };
29 typedef std::chrono::milliseconds ms;
31 std::atomic<WorkerThreadState> thread_state(WorkerThreadState::Uninitialized);
33 void set_worker_thread_state(WorkerThreadState state)
35 thread_state.store(state, std::memory_order_relaxed);
38 void wait_for_worker_thread_state(WorkerThreadState state)
40 while (thread_state.load(std::memory_order_relaxed) != state)
41 std::this_thread::yield();
44 void func1(std::promise<int> p)
46 wait_for_worker_thread_state(WorkerThreadState::AllowedToRun);
47 p.set_value(3);
48 set_worker_thread_state(WorkerThreadState::Exiting);
51 int j = 0;
53 void func3(std::promise<int&> p)
55 wait_for_worker_thread_state(WorkerThreadState::AllowedToRun);
56 j = 5;
57 p.set_value(j);
58 set_worker_thread_state(WorkerThreadState::Exiting);
61 void func5(std::promise<void> p)
63 wait_for_worker_thread_state(WorkerThreadState::AllowedToRun);
64 p.set_value();
65 set_worker_thread_state(WorkerThreadState::Exiting);
68 int main(int, char**)
70 typedef std::chrono::high_resolution_clock Clock;
73 typedef int T;
74 std::promise<T> p;
75 std::shared_future<T> f = p.get_future();
76 support::make_test_thread(func1, std::move(p)).detach();
77 assert(f.valid());
78 assert(f.wait_until(Clock::now() + ms(10)) == std::future_status::timeout);
79 assert(f.valid());
81 // allow the worker thread to produce the result and wait until the worker is done
82 set_worker_thread_state(WorkerThreadState::AllowedToRun);
83 wait_for_worker_thread_state(WorkerThreadState::Exiting);
85 assert(f.wait_until(Clock::now() + ms(10)) == std::future_status::ready);
86 assert(f.valid());
87 f.wait();
88 assert(f.valid());
91 typedef int& T;
92 std::promise<T> p;
93 std::shared_future<T> f = p.get_future();
94 support::make_test_thread(func3, std::move(p)).detach();
95 assert(f.valid());
96 assert(f.wait_until(Clock::now() + ms(10)) == std::future_status::timeout);
97 assert(f.valid());
99 // allow the worker thread to produce the result and wait until the worker is done
100 set_worker_thread_state(WorkerThreadState::AllowedToRun);
101 wait_for_worker_thread_state(WorkerThreadState::Exiting);
103 assert(f.wait_until(Clock::now() + ms(10)) == std::future_status::ready);
104 assert(f.valid());
105 f.wait();
106 assert(f.valid());
109 typedef void T;
110 std::promise<T> p;
111 std::shared_future<T> f = p.get_future();
112 support::make_test_thread(func5, std::move(p)).detach();
113 assert(f.valid());
114 assert(f.wait_until(Clock::now() + ms(10)) == std::future_status::timeout);
115 assert(f.valid());
117 // allow the worker thread to produce the result and wait until the worker is done
118 set_worker_thread_state(WorkerThreadState::AllowedToRun);
119 wait_for_worker_thread_state(WorkerThreadState::Exiting);
121 assert(f.wait_until(Clock::now() + ms(10)) == std::future_status::ready);
122 assert(f.valid());
123 f.wait();
124 assert(f.valid());
127 return 0;