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module/jni/libcxx/test/std/thread/thread.semaphore/binary.pass.cpp

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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
+// UNSUPPORTED: c++03, c++11
+
+// 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}}
+
+// <semaphore>
+
+#include <semaphore>
+#include <chrono>
+#include <thread>
+#include <type_traits>
+
+#include "make_test_thread.h"
+#include "test_macros.h"
+
+static_assert(std::is_same<std::binary_semaphore, std::counting_semaphore<1>>::value, "");
+
+int main(int, char**)
+{
+  std::binary_semaphore s(1);
+
+  auto l = [&](){
+    for(int i = 0; i < 1024; ++i) {
+        s.acquire();
+        std::this_thread::sleep_for(std::chrono::microseconds(1));
+        s.release();
+    }
+  };
+
+  std::thread t = support::make_test_thread(l);
+  l();
+
+  t.join();
+
+  return 0;
+}