/// <summary>
/// Initializes a new instance of the <see cref="object"/> class.
/// </summary>
public Cleaner([NotNull] ContextStack <T> stack)
{
_stack = stack;
_threadId = Thread.CurrentThread.ManagedThreadId;
_oldStack = CallContext.LogicalGetData(_stack._contextKey) as string;
if (_oldStack != null)
{
CallContext.FreeNamedDataSlot(_stack._contextKey);
}
_tls = _stack._stackCache.Value;
// Clear the stack cache.
_stack._stackCache.Value = default(KeyValuePair <string, IEnumerable <T> >);
}
/// <summary>
/// Initializes a new instance of the <see cref="ContextStack<T>.Disposer"/> class.
/// </summary>
/// <param name="stack">The stack.</param>
/// <param name="value">The value.</param>
public Disposer([NotNull] ContextStack <T> stack, T value)
{
_stack = stack;
_threadId = Thread.CurrentThread.ManagedThreadId;
// We use Interlocked.Increment, as it's thread safe and never overflows (wraps around).
// by the time it wraps back to itself it's highly likely that the objects are no longer in use.
// However, the while loop ensures we get a nice blank spot.
T used;
do
{
_key = Interlocked.Increment(ref stack._counter);
} while (stack._objects.TryGetValue(_key, out used));
stack._objects.AddOrUpdate(_key, value, (k, v) => value);
_oldStack = CallContext.LogicalGetData(stack._contextKey) as string;
CallContext.LogicalSetData(
stack._contextKey,
(_oldStack == null ? string.Empty : _oldStack + "|") + _key);
}