42 lines
1.2 KiB
C#
42 lines
1.2 KiB
C#
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namespace NucleicProtocol.Interop;
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/// Managed ownership wrapper for the shared Swift transcript projector.
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public interface ITranscriptProjector : IDisposable
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{
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ProjectionDiff Apply(string hostMessageJson);
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}
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public sealed class ProtocolProjection : ITranscriptProjector
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{
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private readonly object gate = new();
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private readonly INativeProtocol native;
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private nint handle;
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public ProtocolProjection(INativeProtocol? native = null)
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{
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this.native = native ?? PInvokeNativeProtocol.Instance;
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handle = this.native.ProjectionCreate();
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if (handle == 0) throw new InvalidOperationException("could not create transcript projection");
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}
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public ProjectionDiff Apply(string hostMessageJson)
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{
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lock (gate)
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{
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ObjectDisposedException.ThrowIf(handle == 0, this);
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var value = native.ProjectionApply(handle, hostMessageJson);
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return ProjectionDiff.Parse(native.CopyAndFreeString(value));
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}
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}
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public void Dispose()
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{
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lock (gate)
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{
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if (handle == 0) return;
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native.ProjectionFree(handle);
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handle = 0;
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}
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}
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}
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