public void JavaReferencedInstanceSurvivesCollection()
{
Console.WriteLine("JavaReferencedInstanceSurvivesCollection");
using (var t = new JniType("java/lang/Object")) {
var oldHandle = IntPtr.Zero;
var array = new JavaObjectArray <JavaObject> (1);
FinalizerHelpers.PerformNoPinAction(() => {
var v = new JavaObject();
oldHandle = v.PeerReference.Handle;
array [0] = v;
});
JniEnvironment.Runtime.ValueManager.CollectPeers();
GC.WaitForPendingFinalizers();
GC.WaitForPendingFinalizers();
var first = array [0];
Assert.IsNotNull(JniRuntime.CurrentRuntime.ValueManager.PeekValue(first.PeerReference));
var f = first.PeerReference;
var o = (JavaObject)JniRuntime.CurrentRuntime.ValueManager.GetValue(ref f, JniObjectReferenceOptions.Copy);
Assert.AreSame(first, o);
if (oldHandle != o.PeerReference.Handle)
{
Console.WriteLine("Yay, object handle changed; value survived a GC!");
}
else
{
Console.WriteLine("What is this, Android pre-ICS?!");
}
o.Dispose();
array.Dispose();
}
}
public void CrossThreadSharingRequresRegistration()
{
JavaObject o = null;
FinalizerHelpers.PerformNoPinAction(() => {
o = new JavaObject();
});
o.ToString();
o.Dispose();
}
public void Dispose_Finalized()
{
var d = false;
var f = false;
FinalizerHelpers.PerformNoPinAction(() => {
FinalizerHelpers.PerformNoPinAction(() => {
var v = new JavaDisposedObject(() => d = true, () => f = true);
GC.KeepAlive(v);
});
JniEnvironment.Runtime.ValueManager.CollectPeers();
});
JniEnvironment.Runtime.ValueManager.CollectPeers();
GC.WaitForPendingFinalizers();
Assert.IsFalse(d);
Assert.IsTrue(f);
}
public void UnreferencedInstanceIsCollected()
{
JniObjectReference oldHandle = new JniObjectReference();
WeakReference r = null;
FinalizerHelpers.PerformNoPinAction(() => {
var v = new JavaObject();
oldHandle = v.PeerReference.NewWeakGlobalRef();
r = new WeakReference(v);
});
JniEnvironment.Runtime.ValueManager.CollectPeers();
GC.WaitForPendingFinalizers();
GC.WaitForPendingFinalizers();
Assert.IsFalse(r.IsAlive);
Assert.IsNull(r.Target);
Assert.IsNull(JniRuntime.CurrentRuntime.ValueManager.PeekValue(oldHandle));
JniObjectReference.Dispose(ref oldHandle);
}