public void EndCancel(IAsyncResult result)
{
lock (_renderLock)
{
if (_cancelResult != null)
{
if (_cancelResult != result)
{
throw new SplicerException(Resources.ErrorAsyncResultNotIssuesByThisInstance);
}
if (_cancelResult.Consumed)
{
throw new SplicerException(Resources.ErrorEndCancelAlreadyCalledForAsyncResult);
}
_cancelResult.AsyncWaitHandle.WaitOne();
_cancelResult.Consume();
if (_cancelResult.Exception != null)
{
throw new SplicerException(Resources.ErrorExceptionOccuredDuringCancelRenderRequest,
_cancelResult.Exception);
}
_cancelResult = null;
}
else
{
throw new SplicerException(Resources.ErrorMustCallBeginCancelBeforeEndCancel);
}
}
}
public void EndCancel(IAsyncResult result)
{
lock (_renderLock)
{
if (_cancelResult != null)
{
if (_cancelResult != result)
{
throw new SplicerException("The supplied async result was not issued by this instance");
}
if (_cancelResult.Consumed)
{
throw new SplicerException("EndCancel has already been called fo this async result");
}
_cancelResult.AsyncWaitHandle.WaitOne();
_cancelResult.Consume();
if (_cancelResult.Exception != null)
{
throw new SplicerException(
"Exception occured while attempting to cancel render request, see inner exception for details",
_cancelResult.Exception);
}
_cancelResult = null;
}
else
{
throw new SplicerException("You must call BeginCancel before EndCancel");
}
}
}
public IAsyncResult BeginCancel(AsyncCallback callback, object state)
{
lock (_renderLock)
{
if ((_cancelResult != null) && (!_cancelResult.Consumed))
{
throw new SplicerException(
"You can not cancel, a request to cancel has already been issued - have you remembered to call EndCancel?");
}
else if (_state < RendererState.GraphStarted)
{
throw new SplicerException("Graph not yet started");
}
else if (_state >= RendererState.GraphCompleting)
{
throw new SplicerException("You can not cancel this renderer, it is already completing/canceling");
}
ChangeState(RendererState.GraphStarted, RendererState.Cancelling);
_cancelResult = new RendererAsyncResult(callback, state);
return(_cancelResult);
}
}
/// <summary>
/// Begins rendering and returns immediately.
/// </summary>
/// <remarks>
/// Final status is sent as a <see cref="AbstractRenderer.RenderCompleted"/> event.
/// </remarks>
public IAsyncResult BeginRender(AsyncCallback callback, object state)
{
lock (_renderLock)
{
if ((_renderResult != null) && (_renderResult.Consumed))
{
throw new SplicerException(Resources.ErrorPreviousRenderRequestInProgress);
}
ChangeState(RendererState.GraphStarted);
_renderResult = new RendererAsyncResult(callback, state);
_cancelResult = null;
StartRender();
return(_renderResult);
}
}
/// <summary>
/// Begins rendering and returns immediately.
/// </summary>
/// <remarks>
/// Final status is sent as a <see cref="AbstractRenderer.RenderCompleted"/> event.
/// </remarks>
public IAsyncResult BeginRender(AsyncCallback callback, object state)
{
lock (_renderLock)
{
if ((_renderResult != null) && (_renderResult.Consumed))
{
throw new SplicerException(
"A previous render request has not yet been completed - have you remembered to call EndRender?");
}
ChangeState(RendererState.GraphStarted);
_renderResult = new RendererAsyncResult(callback, state);
_cancelResult = null;
StartRender();
return(_renderResult);
}
}
public IAsyncResult BeginCancel(AsyncCallback callback, object state)
{
lock (_renderLock)
{
if ((_cancelResult != null) && (!_cancelResult.Consumed))
{
throw new SplicerException(Resources.ErrorAttemptToCancelWhenCancelInProgress);
}
else if (_state < RendererState.GraphStarted)
{
throw new SplicerException(Resources.ErrorGraphNotYetStarted);
}
else if (_state >= RendererState.GraphCompleting)
{
throw new SplicerException(Resources.ErrorAttemptToCancelWhenCancelingOrCompleting);
}
ChangeState(RendererState.GraphStarted, RendererState.Cancelling);
_cancelResult = new RendererAsyncResult(callback, state);
return(_cancelResult);
}
}
public void EndCancel(IAsyncResult result)
{
lock (_renderLock)
{
if (_cancelResult != null)
{
if (_cancelResult != result)
{
throw new SplicerException(Resources.ErrorAsyncResultNotIssuesByThisInstance);
}
if (_cancelResult.Consumed)
{
throw new SplicerException(Resources.ErrorEndCancelAlreadyCalledForAsyncResult);
}
_cancelResult.AsyncWaitHandle.WaitOne();
_cancelResult.Consume();
if (_cancelResult.Exception != null)
{
throw new SplicerException(Resources.ErrorExceptionOccuredDuringCancelRenderRequest,
_cancelResult.Exception);
}
_cancelResult = null;
}
else
{
throw new SplicerException(Resources.ErrorMustCallBeginCancelBeforeEndCancel);
}
}
}
/// <summary>
/// Begins rendering and returns immediately.
/// </summary>
/// <remarks>
/// Final status is sent as a <see cref="AbstractRenderer.RenderCompleted"/> event.
/// </remarks>
public IAsyncResult BeginRender(AsyncCallback callback, object state)
{
lock (_renderLock)
{
if ((_renderResult != null) && (_renderResult.Consumed))
{
throw new SplicerException(Resources.ErrorPreviousRenderRequestInProgress);
}
ChangeState(RendererState.GraphStarted);
_renderResult = new RendererAsyncResult(callback, state);
_cancelResult = null;
StartRender();
return _renderResult;
}
}
public IAsyncResult BeginCancel(AsyncCallback callback, object state)
{
lock (_renderLock)
{
if ((_cancelResult != null) && (!_cancelResult.Consumed))
{
throw new SplicerException(Resources.ErrorAttemptToCancelWhenCancelInProgress);
}
else if (_state < RendererState.GraphStarted)
{
throw new SplicerException(Resources.ErrorGraphNotYetStarted);
}
else if (_state >= RendererState.GraphCompleting)
{
throw new SplicerException(Resources.ErrorAttemptToCancelWhenCancelingOrCompleting);
}
ChangeState(RendererState.GraphStarted, RendererState.Cancelling);
_cancelResult = new RendererAsyncResult(callback, state);
return _cancelResult;
}
}
