Amib.Threading.Internal.WorkItem.ExecuteWorkItem C# (CSharp) 메소드

        private void ExecuteWorkItem()
        {
            #if !(_WINDOWS_CE) && !(_SILVERLIGHT) && !(WINDOWS_PHONE)
            CallerThreadContext ctc = null;
            if (null != _callerContext)
            {
                ctc = CallerThreadContext.Capture(_callerContext.CapturedCallContext, _callerContext.CapturedHttpContext);
                CallerThreadContext.Apply(_callerContext);
            }
            #endif

            Exception exception = null;
            object result = null;

            try
            {
                try
                {
                    result = _callback(_state);
                }
                catch (Exception e)
                {
                    // Save the exception so we can rethrow it later
                    exception = e;
                }

                // Remove the value of the execution thread, so it will be impossible to cancel the work item,
                // since it is already completed.
                // Cancelling a work item that already completed may cause the abortion of the next work item!!!
                Thread executionThread = Interlocked.CompareExchange(ref _executingThread, null, _executingThread);

                if (null == executionThread)
                {
                    // Oops! we are going to be aborted..., Wait here so we can catch the ThreadAbortException
                    Thread.Sleep(60 * 1000);

                    // If after 1 minute this thread was not aborted then let it continue working.
                }
            }
            // We must treat the ThreadAbortException or else it will be stored in the exception variable
            catch (ThreadAbortException tae)
            {
                tae.GetHashCode();
                // Check if the work item was cancelled
                // If we got a ThreadAbortException and the STP is not shutting down, it means the
                // work items was cancelled.
                if (!SmartThreadPool.CurrentThreadEntry.AssociatedSmartThreadPool.IsShuttingdown)
                {
            #if !(_WINDOWS_CE) && !(_SILVERLIGHT) && !(WINDOWS_PHONE)
                    Thread.ResetAbort();
            #endif
                }
            }

            #if !(_WINDOWS_CE) && !(_SILVERLIGHT) && !(WINDOWS_PHONE)
            if (null != _callerContext)
            {
                CallerThreadContext.Apply(ctc);
            }
            #endif

            if (!SmartThreadPool.IsWorkItemCanceled)
            {
                SetResult(result, exception);
            }
        }