ContextData.cs

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using System.Diagnostics.CodeAnalysis;
 
namespace System.Transactions;
 
internal sealed class ContextData
{
    internal TransactionScope CurrentScope;
 
    internal Transaction CurrentTransaction;
 
    internal DefaultComContextState DefaultComContextState;
 
    internal WeakReference WeakDefaultComContext;
 
    internal bool _asyncFlow;
 
    [ThreadStatic]
    private static ContextData t_staticData;
 
    internal static ContextData TLSCurrentData
    {
        get
        {
            ContextData contextData = t_staticData;
            if (contextData == null)
            {
                contextData = (t_staticData = new ContextData(asyncFlow: false));
            }
            return contextData;
        }
        [param: AllowNull]
        set
        {
            if (value == null && t_staticData != null)
            {
                t_staticData.CurrentScope = null;
                t_staticData.CurrentTransaction = null;
                t_staticData.DefaultComContextState = DefaultComContextState.Unknown;
                t_staticData.WeakDefaultComContext = null;
            }
            else
            {
                t_staticData = value;
            }
        }
    }
 
    internal ContextData(bool asyncFlow)
    {
        _asyncFlow = asyncFlow;
    }
 
    internal static ContextData LookupContextData(TxLookup defaultLookup)
    {
        ContextData currentData = null;
        if (CallContextCurrentData.TryGetCurrentData(out currentData))
        {
            if (currentData.CurrentScope == null && currentData.CurrentTransaction == null && defaultLookup != TxLookup.DefaultCallContext)
            {
                CallContextCurrentData.ClearCurrentData(null, removeContextData: true);
                return TLSCurrentData;
            }
            return currentData;
        }
        return TLSCurrentData;
    }
}