/// <summary>
/// common handler for EndExecuteBatch & EndSaveChanges
/// </summary>
/// <typeparam name="T">derived type of the AsyncResult</typeparam>
/// <param name="source">source object of async request</param>
/// <param name="method">async method name on source object</param>
/// <param name="asyncResult">the asyncResult being ended</param>
/// <returns>data service response for batch</returns>
internal static T EndExecute <T>(object source, string method, IAsyncResult asyncResult) where T : BaseAsyncResult
{
Util.CheckArgumentNull(asyncResult, "asyncResult");
T result = (asyncResult as T);
if ((null == result) || (source != result.Source) || (result.Method != method))
{
throw Error.Argument(Strings.Context_DidNotOriginateAsync, "asyncResult");
}
Debug.Assert((result.CompletedSynchronously && result.IsCompleted) || !result.CompletedSynchronously, "CompletedSynchronously && !IsCompleted");
if (!result.IsCompleted)
{ // if the user doesn't want to wait forever, they should explictly wait on the handle with a timeout
result.AsyncWaitHandle.WaitOne();
Debug.Assert(result.IsCompleted, "not completed after waiting");
}
// Prevent EndExecute from being called more than once.
if (System.Threading.Interlocked.Exchange(ref result.done, 1) != 0)
{
throw Error.Argument(Strings.Context_AsyncAlreadyDone, "asyncResult");
}
// Dispose the wait handle.
if (null != result.asyncWait)
{
System.Threading.Interlocked.CompareExchange(ref result.asyncWaitDisposeLock, new object(), null);
lock (result.asyncWaitDisposeLock)
{
result.asyncWaitDisposed = true;
Util.Dispose(result.asyncWait);
}
}
if (result.IsAborted)
{
throw Error.InvalidOperation(Strings.Context_OperationCanceled);
}
if (null != result.Failure)
{
if (Util.IsKnownClientExcption(result.Failure))
{
throw result.Failure;
}
throw Error.InvalidOperation(Strings.DataServiceException_GeneralError, result.Failure);
}
return(result);
}
internal static T EndExecute <T>(object source, string method, IAsyncResult asyncResult) where T : BaseAsyncResult
{
Util.CheckArgumentNull <IAsyncResult>(asyncResult, "asyncResult");
T local = asyncResult as T;
if (((local == null) || (source != local.Source)) || (local.Method != method))
{
throw Error.Argument(Strings.Context_DidNotOriginateAsync, "asyncResult");
}
if (!local.IsCompleted)
{
local.AsyncWaitHandle.WaitOne();
}
if (Interlocked.Exchange(ref local.done, 1) != 0)
{
throw Error.Argument(Strings.Context_AsyncAlreadyDone, "asyncResult");
}
if (local.asyncWait != null)
{
Interlocked.CompareExchange(ref local.asyncWaitDisposeLock, new object(), null);
lock (local.asyncWaitDisposeLock)
{
local.asyncWaitDisposed = true;
Util.Dispose <ManualResetEvent>(local.asyncWait);
}
}
if (local.IsAborted)
{
throw Error.InvalidOperation(Strings.Context_OperationCanceled);
}
if (local.Failure == null)
{
return(local);
}
if (Util.IsKnownClientExcption(local.Failure))
{
throw local.Failure;
}
throw Error.InvalidOperation(Strings.DataServiceException_GeneralError, local.Failure);
}
