Removed ShutdownMode. Now always behaves like original Reload#1638
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lostmsu merged 4 commits intopythonnet:masterfrom Dec 25, 2021
Merged
Removed ShutdownMode. Now always behaves like original Reload#1638lostmsu merged 4 commits intopythonnet:masterfrom
ShutdownMode. Now always behaves like original Reload#1638lostmsu merged 4 commits intopythonnet:masterfrom
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filmor
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Dec 20, 2021
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@filmor looks like I got tests to pass, so this is ready. |
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filmor
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filmor
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filmor
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Dec 21, 2021
| ResetPyMembers(); | ||
| if (mode != ShutdownMode.Extension) | ||
| { | ||
| Py_Finalize(); |
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This is my only real gripe with this: Embedders would not be able to finalise the Python runtime at all anymore. Maybe we should provide this (Shutdown() + Py_Finalize()) as a possible footgun with a long name?
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We can always add it if there is a strong request. Instead what happened is people opening bugs about crashes after restarting runtime because NumPy does not support it. I'd rather avoid it.
Moreover, the behavior of the whole thing when either of runtimes is shut down completely is pretty much undefined.
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… is an equivalent of `ShutdownMode.Reload` also in this change: - fixed Python derived types not being decrefed when an instance is deallocated - reduced time and amount of storage needed for runtime reload - removed circular reference loop between Type <-> ConstructorBinding(s) + exposed Runtime.TryCollectingGarbage
clearing GCHandle from an instance of Python derived type would drop the last reference to it, so it was destroyed without being removed from reflectedObjects collection
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@filmor I am waiting for an explicit approval or more comments |
filmor
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Dec 25, 2021
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What does this implement/fix? Explain your changes.
This removes all shutdown modes, except
Reload(which you don't need to specify, because it is the only one left).This means Python C runtime is never actually shut down when .NET calls
PythonEngine.Shutdown(). Instead, anything from .NET exposed to Python beforeShutdownbecomes unavailable untilPythonEngine.Initialize()is called again (which can be done from a differentAppDomain).Any other comments?
Also in this change:
ConstructorBinding(s)Runtime.TryCollectingGarbageA review from @amos402 would be welcome