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TestFinalizer.cs
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68 lines (58 loc) · 1.92 KB
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using System;
using System.IO;
using System.Threading;
using System.Threading.Tasks;
using NUnit.Framework;
using Python.Runtime;
namespace Python.EmbeddingTest
{
public class TestFinalizer
{
[OneTimeSetUp]
public void SetUp()
{
PythonEngine.Initialize();
}
[OneTimeTearDown]
public void Dispose()
{
PythonEngine.Shutdown();
}
[Test]
public void TestClrObjectFullRelease()
{
var gs = PythonEngine.BeginAllowThreads();
WeakReference weakRef;
try
{
var weakRefCreateTask = Task.Factory.StartNew(() =>
{
using (Py.GIL())
{
byte[] testObject = new byte[100];
var testObjectWeakReference = new WeakReference(testObject);
dynamic pyList = new PyList();
pyList.append(testObject);
return testObjectWeakReference;
}
});
weakRef = weakRefCreateTask.Result;
}
finally
{
PythonEngine.EndAllowThreads(gs);
}
// Triggering C# finalizer (PyList ref should be scheduled to decref).
GC.Collect();
GC.WaitForPendingFinalizers();
// Forcing dec reference thread to wakeup and decref PyList.
PythonEngine.EndAllowThreads(PythonEngine.BeginAllowThreads());
Thread.Sleep(200);
PythonEngine.CurrentRefDecrementer.WaitForPendingDecReferences();
// Now python free up GCHandle on CLRObject and subsequent GC should fully remove testObject.
GC.Collect();
GC.WaitForPendingFinalizers();
Assert.IsFalse(weakRef.IsAlive, "Clr object should be collected.");
}
}
}