21 lines
563 B
C#
21 lines
563 B
C#
namespace System.Web.Mvc.Async {
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using System;
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using System.Threading;
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// used to synchronize access to a single-use consumable resource
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internal sealed class SingleEntryGate {
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private const int NOT_ENTERED = 0;
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private const int ENTERED = 1;
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private int _status;
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// returns true if this is the first call to TryEnter(), false otherwise
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public bool TryEnter() {
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int oldStatus = Interlocked.Exchange(ref _status, ENTERED);
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return (oldStatus == NOT_ENTERED);
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}
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}
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}
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