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//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// UNSUPPORTED: libcpp-has-no-threads
// <condition_variable>
// class condition_variable;
// void notify_one();
#include <condition_variable>
#include <atomic>
#include <mutex>
#include <thread>
#include <cassert>
std::condition_variable cv;
std::mutex mut;
std::atomic_int test1(0);
std::atomic_int test2(0);
void f1()
{
std::unique_lock<std::mutex> lk(mut);
assert(test1 == 0);
while (test1 == 0)
cv.wait(lk);
assert(test1 == 1);
test1 = 2;
}
void f2()
{
std::unique_lock<std::mutex> lk(mut);
assert(test2 == 0);
while (test2 == 0)
cv.wait(lk);
assert(test2 == 1);
test2 = 2;
}
int main()
{
std::thread t1(f1);
std::thread t2(f2);
std::this_thread::sleep_for(std::chrono::milliseconds(100));
{
std::unique_lock<std::mutex>lk(mut);
test1 = 1;
test2 = 1;
}
cv.notify_one();
{
std::this_thread::sleep_for(std::chrono::milliseconds(100));
std::unique_lock<std::mutex>lk(mut);
}
if (test1 == 2)
{
assert(test2 == 1);
t1.join();
test1 = 0;
}
else if (test2 == 2)
{
assert(test1 == 1);
t2.join();
test2 = 0;
}
else
assert(false);
cv.notify_one();
{
std::this_thread::sleep_for(std::chrono::milliseconds(100));
std::unique_lock<std::mutex>lk(mut);
}
if (test1 == 2)
{
assert(test2 == 0);
t1.join();
test1 = 0;
}
else if (test2 == 2)
{
assert(test1 == 0);
t2.join();
test2 = 0;
}
else
assert(false);
}
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