blob: ec159daf87a3fb33bcf43ed74b345f68c3595e70 [file] [log] [blame]
//===----------------------------------------------------------------------===//
//
// 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
// UNSUPPORTED: c++03, c++11
// Until we drop support for the synchronization library in C++11/14/17
// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
// XFAIL: availability-synchronization_library-missing
// <semaphore>
#include <cassert>
#include <semaphore>
#include <thread>
#include "make_test_thread.h"
#include "test_macros.h"
int main(int, char**)
{
std::counting_semaphore<> s(1);
assert(s.try_acquire());
assert(!s.try_acquire());
s.release();
assert(s.try_acquire());
assert(!s.try_acquire());
s.release(2);
std::thread t = support::make_test_thread([&](){
assert(s.try_acquire());
});
t.join();
assert(s.try_acquire());
assert(!s.try_acquire());
return 0;
}