public void RunTest()
{
// A thread running the GC.
var done = new ManualResetEvent(false);
var gcThread = new Thread(() =>
{
while (!done.WaitOne(0))
{
Thread.Sleep(100);
GC.Collect();
}
})
{
IsBackground = true,
};
gcThread.Start();
// A thread calling retain/release on an object
var rrThread = new Thread(() =>
{
var obj = new CustomObject();
while (!done.WaitOne(0))
{
obj.DangerousRetain();
obj.DangerousRelease();
}
})
{
IsBackground = true,
};
rrThread.Start();
// A thread that calls a method returning a custom object
var itThread = new Thread(() =>
{
var obj = new CustomObject();
while (!done.WaitOne(0))
{
Messaging.IntPtr_objc_msgSend(obj.Handle, Selector.GetHandle("getObject"));
}
})
{
IsBackground = true,
};
itThread.Start();
// Let the threads run for little bit. 500ms is enough to trigger the deadlock for me pretty much always.
// If the process deadlocks, the bug is there.
Thread.Sleep(500);
done.Set();
gcThread.Join();
rrThread.Join();
itThread.Join();
}