8ac9e6675b
Once sleep paces the VM thread, the main-thread compositor's SnapshotVisibleObjects truly overlaps VM-thread _objects/_registry writes. GetOrCreate/Register/Release were unlocked -> 'Destination array is not long enough' under concurrent enumeration. _lock is re-entrant so BindDraw/EraseRange (already locked) stay correct. 52 green. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
29 lines
875 B
C#
29 lines
875 B
C#
using System.Threading.Tasks;
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using Age.Engine.Model;
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using Xunit;
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public class GfxStateConcurrencyTests
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{
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[Fact]
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public void Snapshot_DoesNotThrow_WhileObjectsMutate()
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{
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var gfx = new GfxState();
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var stop = false;
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var writer = Task.Run(() =>
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{
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long h = 0;
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while (!stop)
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{
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h = (h + 1) % 64;
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gfx.BindDraw(h, 0, 0, 0, 10, 10, 0, 0); // GetOrCreate + visible
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gfx.GetOrCreate(h + 100); // bare create
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if (h % 8 == 0) gfx.Release(h + 100); // remove
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}
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});
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// Hammer the reader concurrently; a dictionary mutated during enumeration would throw here.
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for (int i = 0; i < 20000; i++) { var _ = gfx.SnapshotVisibleObjects(); }
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stop = true;
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writer.Wait();
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}
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}
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