SSPIHandleCache.cs

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using System.Threading;
 
namespace System.Net.Security;
 
internal static class SSPIHandleCache
{
    private static readonly System.Net.Security.SafeCredentialReference[] s_cacheSlots = new System.Net.Security.SafeCredentialReference[32];
 
    private static int s_current = -1;
 
    internal static void CacheCredential(System.Net.Security.SafeFreeCredentials newHandle)
    {
        try
        {
            System.Net.Security.SafeCredentialReference safeCredentialReference = System.Net.Security.SafeCredentialReference.CreateReference(newHandle);
            if (safeCredentialReference != null)
            {
                int num = Interlocked.Increment(ref s_current) & 0x1F;
                Interlocked.Exchange(ref s_cacheSlots[num], safeCredentialReference)?.Dispose();
            }
        }
        catch (Exception ex)
        {
            if (System.Net.NetEventSource.Log.IsEnabled() && !System.Net.ExceptionCheck.IsFatal(ex))
            {
                System.Net.NetEventSource.Error(null, $"Attempted to throw: {ex}", "CacheCredential");
            }
        }
    }
}