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Allow GIL state debugging; require GILState to be properly disposed by lostmsu · Pull Request #1397 · pythonnet/pythonnet · GitHub

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Allow GIL state debugging; require GILState to be properly disposed #1397

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Merged
lostmsu merged 1 commit into from
Mar 10, 2021
Conversation 2 Commits 1 Checks 0 Files changed
Merged

Allow GIL state debugging; require GILState to be properly disposed #1397

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26 changes: 23 additions & 3 deletions src/runtime/pythonengine.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,7 @@
using System.Linq;
using System.Reflection;
using System.Runtime.InteropServices;
using System.Threading;

namespace Python.Runtime
{
Expand Down Expand Up @@ -51,6 +52,9 @@ public static bool IsInitialized
get { return initialized; }
}

/// <summary>Set to <c>true</c> to enable GIL debugging assistance.</summary>
public static bool DebugGIL { get; set; } = false;

internal static DelegateManager DelegateManager
{
get
Expand Down Expand Up @@ -668,7 +672,7 @@ public static GILState GIL()
PythonEngine.Initialize();
}

return new GILState();
return PythonEngine.DebugGIL ? new DebugGILState() : new GILState();
}

public static PyScope CreateScope()
Expand All @@ -693,7 +697,7 @@ internal GILState()
state = PythonEngine.AcquireLock();
}

public void Dispose()
public virtual void Dispose()
{
if (this.isDisposed) return;

Expand All @@ -704,7 +708,23 @@ public void Dispose()

~GILState()
{
Dispose();
throw new InvalidOperationException("GIL must always be released, and it must be released from the same thread that acquired it.");
}
}

public class DebugGILState : GILState
{
readonly Thread owner;
internal DebugGILState() : base()
{
this.owner = Thread.CurrentThread;
}
public override void Dispose()
{
if (this.owner != Thread.CurrentThread)
throw new InvalidOperationException("GIL must always be released from the same thread, that acquired it");

base.Dispose();
}
}

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