public void Test1()
{
var mutex = new object();
var cv = new ConditionVariable <int>();
bool ready = false;
bool processed = false;
// Main
{
var worker = new Thread(new ThreadStart(WorkerThread)).Run();
// send data to the worker thread
lock (mutex)
{
ready = true;
cv.NotifyOne(mutex, 1);
}
// wait for the worker
lock (mutex)
{
var value = cv.Wait(mutex, x => processed);
Assert.Equal(value, 42);
}
worker.Join();
}
void WorkerThread()
{
// Wait until main() sends data
lock (mutex)
{
var value = cv.Wait(mutex, x => ready);
Assert.Equal(value, 1);
// after the wait, we own the lock.
cv.NotifyOne(mutex, 42);
// Send data back to main()
processed = true;
}
}
}
public async void Test2()
{
var cv = new ConditionVariable();
var data = (string?)null;
var ready = false;
var processed = false;
// Main
{
var worker = new Thread(new ThreadStart(WorkerThread)).Run();
data = "Example data";
// send data to the worker thread
ready = true;
cv.NotifyOne();
// wait for the worker
await cv.WaitAsync(() => processed);
// "Back in main(), data = " << data << '\n';
Assert.Equal(data, "Changed data");
worker.Join();
}
async void WorkerThread()
{
// Wait until main() sends data
await cv.WaitAsync(() => ready);
// after the wait, we own the lock.
data = "Changed data";
// Send data back to main()
processed = true;
// Should be notifying outside of the lock but C# Monitor.Pulse is
// not quite the same as std::condition_variable.notifiy_all()
cv.NotifyOne();
}
}