private static void Main(string[] args)
{
CancellationTokenSource cts = new CancellationTokenSource();
Console.CancelKeyPress +=
(sender, e) =>
{
e.Cancel = true;
cts.Cancel();
};
// Since Console apps do not have a SyncronizationContext, we're leveraging the built-in support
// in WPF to pump the messages via the Dispatcher.
// See the following for additional details:
// http://blogs.msdn.com/b/pfxteam/archive/2012/01/21/10259307.aspx
// https://github.com/DotNetAnalyzers/StyleCopAnalyzers/pull/1362
SynchronizationContext previousContext = SynchronizationContext.Current;
try
{
var context = new DispatcherSynchronizationContext();
SynchronizationContext.SetSynchronizationContext(context);
DispatcherFrame dispatcherFrame = new DispatcherFrame();
Task mainTask = MainAsync(args, cts.Token);
mainTask.ContinueWith(task => dispatcherFrame.Continue = false);
Dispatcher.PushFrame(dispatcherFrame);
mainTask.GetAwaiter().GetResult();
}
finally
{
SynchronizationContext.SetSynchronizationContext(previousContext);
}
}
/// <summary>
/// Processes all UI messages currently in the message queue.
/// </summary>
public static void DoEvents()
{
// Create new nested message pump.
DispatcherFrame nestedFrame = new DispatcherFrame();
// Dispatch a callback to the current message queue, when getting called,
// this callback will end the nested message loop.
// note that the priority of this callback should be lower than the that of UI event messages.
DispatcherOperation exitOperation = Dispatcher.CurrentDispatcher.BeginInvoke(
DispatcherPriority.Background, exitFrameCallback, nestedFrame);
// pump the nested message loop, the nested message loop will
// immediately process the messages left inside the message queue.
Dispatcher.PushFrame(nestedFrame);
// If the "exitFrame" callback doesn't get finished, Abort it.
if (exitOperation.Status != DispatcherOperationStatus.Completed)
{
exitOperation.Abort();
}
}
public static void DoEvents()
{
DispatcherFrame frame = new DispatcherFrame();
Dispatcher.CurrentDispatcher.BeginInvoke(DispatcherPriority.Background,
new DispatcherOperationCallback(ExitFrame), frame);
Dispatcher.PushFrame(frame);
}
public void Subscription_push_can_be_dispatched_on_designated_thread_blocking_scenario()
{
var threadId = -2;
var threadIdFromTest = -1;
IBus bus = null;
var resetEvent = new ManualResetEvent(false);
var uiThread = new Thread(
() =>
{
Helpers.CreateDispatchContext();
var frame = new DispatcherFrame();
threadId = Thread.CurrentThread.ManagedThreadId;
bus = BusSetup.StartWith<RichClientFrontend>().Construct();
bus.Subscribe<MessageB>(
msg =>
{
threadIdFromTest = Thread.CurrentThread.ManagedThreadId;
frame.Continue = false;
},
c => c.DispatchOnUiThread());
resetEvent.Set();
Dispatcher.PushFrame(frame);
});
uiThread.Start();
resetEvent.WaitOne();
bus.Publish(new MessageB());
uiThread.Join();
threadIdFromTest.ShouldBeEqualTo(threadId);
}
public static void ExecuteWithDispatcher(Action<Dispatcher, Action> testBodyDelegate,
int timeoutMilliseconds = 20000, string timeoutMessage = "Test did not complete in the spefied timeout")
{
var uiThreadDispatcher = Dispatcher.CurrentDispatcher;
//ThreadingHelpers.UISynchronizationContext = new DispatcherSynchronizationContext(uiThreadDispatcher);
var frame = new DispatcherFrame();
// Set-up timer that will call Fail if the test is not completed in specified timeout
TimeSpan timeout = TimeSpan.FromMilliseconds(timeoutMilliseconds);
if (Debugger.IsAttached)
{
timeout = TimeSpan.FromDays(1);
}
Observable.Timer(timeout)
.Subscribe(
_ => { uiThreadDispatcher.BeginInvoke(new Action(() => { Assert.True(false, timeoutMessage); })); });
// Shedule the test body with current dispatcher (UI thread)
uiThreadDispatcher.BeginInvoke(
new Action(() => { testBodyDelegate(uiThreadDispatcher, () => { frame.Continue = false; }); }));
// Run the dispatcher loop that will execute the above logic
Dispatcher.PushFrame(frame);
}
private static void Main(string[] args)
{
CancellationTokenSource cts = new CancellationTokenSource();
Console.CancelKeyPress +=
(sender, e) =>
{
e.Cancel = true;
cts.Cancel();
};
SynchronizationContext previousContext = SynchronizationContext.Current;
try
{
var context = new DispatcherSynchronizationContext();
SynchronizationContext.SetSynchronizationContext(context);
DispatcherFrame dispatcherFrame = new DispatcherFrame();
Task mainTask = MainAsync(args, cts.Token);
mainTask.ContinueWith(task => dispatcherFrame.Continue = false);
Dispatcher.PushFrame(dispatcherFrame);
mainTask.GetAwaiter().GetResult();
}
finally
{
SynchronizationContext.SetSynchronizationContext(previousContext);
}
}
public static void DispatchFrame(DispatcherPriority priority = DispatcherPriority.Background)
{
DispatcherFrame frame = new DispatcherFrame();
Dispatcher.CurrentDispatcher.BeginInvoke(priority,
new DispatcherOperationCallback((f)=>((DispatcherFrame)f).Continue = false), frame);
Dispatcher.PushFrame(frame);
}
public void CountUploadedFiles(int counter, bool result, string fileName)
{
#region Needed for counter
var dispatcherFrame = new DispatcherFrame(true);
Dispatcher.CurrentDispatcher.BeginInvoke
(
DispatcherPriority.Background,
(SendOrPostCallback)delegate(object arg)
{
var f = arg as DispatcherFrame;
if (f != null) f.Continue = false;
},
dispatcherFrame
);
Dispatcher.PushFrame(dispatcherFrame);
#endregion
if (result)
{
textBlockCounter.Text = counter.ToString(CultureInfo.InvariantCulture) + " / " + _theImages.Count;
if (fileName != "")
labelCopyingStatus.Content = "Copying " + fileName;
else
labelCopyingStatus.Content = "";
}
else
textBlockCounter.Text = counter.ToString(CultureInfo.InvariantCulture);
}
public override void Fail(string message, string detailMessage)
{
base.Fail(message, detailMessage); // let base class write the assert to the debug console
string stackTrace = "";
try {
stackTrace = new StackTrace(true).ToString();
} catch {}
lock (ignoredStacks) {
if (ignoredStacks.Contains(stackTrace))
return;
}
if (!dialogIsOpen.Set())
return;
if (!SD.MainThread.InvokeRequired) {
// Use a dispatcher frame that immediately exits after it is pushed
// to detect whether dispatcher processing is suspended.
DispatcherFrame frame = new DispatcherFrame();
frame.Continue = false;
try {
Dispatcher.PushFrame(frame);
} catch (InvalidOperationException) {
// Dispatcher processing is suspended.
// We currently can't show dialogs on the UI thread; so use a new thread instead.
new Thread(() => ShowAssertionDialog(message, detailMessage, stackTrace, false)).Start();
return;
}
}
ShowAssertionDialog(message, detailMessage, stackTrace, true);
}
/// <summary>現在メッセージ待ち行列の中にある全UIメッセージを処理する</summary>
private void DoEvents()
{
// 新しくネスト化されたメッセージ ポンプを作成
DispatcherFrame frame = new DispatcherFrame();
// DispatcherFrame (= 実行ループ) を終了させるコールバック
DispatcherOperationCallback exitFrameCallback = (f) =>
{
// ネスト化されたメッセージ ループを抜ける
((DispatcherFrame)f).Continue = false;
return null;
};
// 非同期で実行する
// 優先度を Background にしているので、このコールバックは
// ほかに処理するメッセージがなくなったら実行される
DispatcherOperation exitOperation = Dispatcher.CurrentDispatcher.BeginInvoke(
DispatcherPriority.Background, exitFrameCallback, frame);
// 実行ループを開始する
Dispatcher.PushFrame(frame);
// コールバックが終了していない場合は中断
if (exitOperation.Status != DispatcherOperationStatus.Completed)
{
exitOperation.Abort();
}
}
public void Open(FrameworkElement container)
{
if (container != null)
{
_container = container;
// 通过禁用来模拟模态的对话框
_container.IsEnabled = false;
// 保持总在最上
this.Owner = GetOwnerWindow(container);
if (this.Owner != null)
{
this.Owner.Closing += new System.ComponentModel.CancelEventHandler(Owner_Closing);
}
// 通过监听容器的Loaded和Unloaded来显示/隐藏窗口
_container.Loaded += new RoutedEventHandler(Container_Loaded);
_container.Unloaded += new RoutedEventHandler(Container_Unloaded);
}
this.Show();
try
{
ComponentDispatcher.PushModal();
_dispatcherFrame = new DispatcherFrame(true);
Dispatcher.PushFrame(_dispatcherFrame);
}
finally
{
ComponentDispatcher.PopModal();
}
}
public static void DoEvents(DispatcherPriority priority = DispatcherPriority.Background) {
DispatcherFrame frame = new DispatcherFrame();
DXSplashScreen.SplashContainer.SplashScreen.Dispatcher.BeginInvoke(
priority,
new DispatcherOperationCallback(ExitFrame),
frame);
Dispatcher.PushFrame(frame);
}
public static void DoEvents(DispatcherPriority nPrio)
{
DispatcherFrame nestedFrame = new DispatcherFrame();
DispatcherOperation exitOperation = Dispatcher.CurrentDispatcher.BeginInvoke(nPrio, exitFrameCallback, nestedFrame);
Dispatcher.PushFrame(nestedFrame);
if (exitOperation.Status != DispatcherOperationStatus.Completed)
exitOperation.Abort();
}
/// <summary>
/// Waits until all pending messages up to the specified priority are processed.
/// </summary>
/// <param name="dispatcher">The dispatcher to wait on.</param>
/// <param name="priority">The priority up to which all messages should be processed.</param>
public static void ProcessMessages([NotNull] this Dispatcher dispatcher, DispatcherPriority priority)
{
Contract.Requires(dispatcher != null);
var frame = new DispatcherFrame();
dispatcher.BeginInvoke(priority, () => frame.Continue = false);
Dispatcher.PushFrame(frame);
}
public static void WaitWithPumping(this Task task)
{
if (task == null) throw new ArgumentNullException("task");
var nestedFrame = new DispatcherFrame();
task.ContinueWith(_ => nestedFrame.Continue = false);
Dispatcher.PushFrame(nestedFrame);
task.Wait();
}
public static void ProcessUITasks()
{
DispatcherFrame frame = new DispatcherFrame();
Dispatcher.CurrentDispatcher.Invoke(DispatcherPriority.ContextIdle, new DispatcherOperationCallback(delegate (object parameter) {
frame.Continue = false;
return null;
}), null);
Dispatcher.PushFrame(frame);
}
public void DoEvents() {
var disp = GetDispatcher();
if (disp != null) {
DispatcherFrame frame = new DispatcherFrame();
disp.BeginInvoke(DispatcherPriority.Background,
new DispatcherOperationCallback(ExitFrame), frame);
Dispatcher.PushFrame(frame);
}
}
public static void DoEvents(this Dispatcher dispatcher)
{
var frame = new DispatcherFrame();
dispatcher.BeginInvoke(
DispatcherPriority.Background,
new DispatcherOperationCallback(ExitFrame),
frame);
Dispatcher.PushFrame(frame);
}
internal override void PumpTill(Task task)
{
if (!task.IsCompleted)
{
var frame = new DispatcherFrame();
task.ContinueWith(_ => frame.Continue = false, TaskScheduler.Default);
Dispatcher.PushFrame(frame);
}
}
public static void WaitWithPumping(Task task)
{
if (task == null) throw new ArgumentNullException("task");
var nestedFrame = new DispatcherFrame();
task.ContinueWith(_ => nestedFrame.Continue = false);
Dispatcher.PushFrame(nestedFrame);
//execute this loop until all other tasks are done. it won't block the ui thread
task.Wait();
}
public void TestDispatcherOrder ()
{
Dispatcher d = Dispatcher.CurrentDispatcher;
DispatcherFrame frame = new DispatcherFrame ();
bool fail = true;
int next = 1;
d.BeginInvoke (DispatcherPriority.Normal, (Action) delegate {
if (next != 3)
throw new Exception ("Expected state 3, got " + next.ToString ());
next = 4;
Console.WriteLine ("First");
});
d.BeginInvoke (DispatcherPriority.Normal, (Action) delegate {
if (next != 4)
throw new Exception ("Expected state 4, got " + next.ToString ());
next = 5;
Console.WriteLine ("Second");
});
d.BeginInvoke (DispatcherPriority.Send, (Action) delegate {
if (next != 1)
throw new Exception ("Expected state 1, got " + next.ToString ());
next = 2;
Console.WriteLine ("High Priority");
d.BeginInvoke (DispatcherPriority.Send, (Action) delegate {
if (next != 2)
throw new Exception ("Expected state 2, got " + next.ToString ());
next = 3;
Console.WriteLine ("INSERTED");
});
});
d.BeginInvoke (DispatcherPriority.SystemIdle, (Action) delegate {
if (next != 6)
throw new Exception ("Expected state 6, got " + next.ToString ());
Console.WriteLine ("Idle");
frame.Continue = false;
fail = false;
});
d.BeginInvoke (DispatcherPriority.Normal, (Action) delegate {
if (next != 5)
throw new Exception ("Expected state 5, got " + next.ToString ());
next = 6;
Console.WriteLine ("Last normal");
});
Dispatcher.PushFrame (frame);
if (fail)
throw new Exception ("Expected all states to run");
}
public void DoEvents()
{
DispatcherFrame frame = new DispatcherFrame();
Dispatcher.CurrentDispatcher.BeginInvoke(DispatcherPriority.Background, new DispatcherOperationCallback(delegate (object f)
{
((DispatcherFrame)f).Continue = false;
return null;
}), frame);
Dispatcher.PushFrame(frame);
}
private void DoAsync(Action action)
{
var frame = new DispatcherFrame();
new Thread((ThreadStart)(() =>
{
action();
frame.Continue = false;
})).Start();
Dispatcher.PushFrame(frame);
}
internal static void WaitForPriority(DispatcherPriority priority)
{
DispatcherFrame frame = new DispatcherFrame();
DispatcherOperation dispatcherOperation = Dispatcher.CurrentDispatcher.BeginInvoke(priority, new DispatcherOperationCallback(ExitFrameOperation), frame);
Dispatcher.PushFrame(frame);
if (dispatcherOperation.Status != DispatcherOperationStatus.Completed)
{
dispatcherOperation.Abort();
}
}
static void DoEvents()
{
DispatcherFrame frame = new DispatcherFrame(true);
Dispatcher.CurrentDispatcher.BeginInvoke(DispatcherPriority.Background, (SendOrPostCallback)delegate(object arg)
{
DispatcherFrame fr = arg as DispatcherFrame;
fr.Continue = false;
}, frame);
Dispatcher.PushFrame(frame);
}
/// <summary>
/// Run all outstanding events queued on the provided Dispatcher
/// </summary>
/// <param name="dispatcher"></param>
public static void DoEvents(this Dispatcher dispatcher)
{
var frame = new DispatcherFrame();
Action<DispatcherFrame> action = _ => { frame.Continue = false; };
dispatcher.BeginInvoke(
DispatcherPriority.SystemIdle,
action,
frame);
Dispatcher.PushFrame(frame);
}
public static void ProcessUiTasks()
{
var frame = new DispatcherFrame();
Dispatcher.CurrentDispatcher.BeginInvoke(DispatcherPriority.Background, new DispatcherOperationCallback(delegate
{
frame.Continue = false;
return null;
}), null);
Dispatcher.PushFrame(frame);
}
// adapted from http://blogs.planetsoftware.com.au/paul/archive/2010/12/05/waiting-for-a-task-donrsquot-block-the-main-ui-thread.aspx
public static void WaitWithPumping(this Task task)
{
if (task == null)
return;
var nestedFrame = new DispatcherFrame();
task.ContinueWith(_ => nestedFrame.Continue = false);
Dispatcher.PushFrame(nestedFrame);
task.Wait();
}
/// <summary>
/// GUI Wait for x seconds
/// </summary>
/// <param name="seconds"></param>
public static void Wait(double seconds)
{
var frame = new DispatcherFrame();
new Thread((ThreadStart)(() =>
{
Thread.Sleep(TimeSpan.FromSeconds(seconds));
frame.Continue = false;
})).Start();
Dispatcher.PushFrame(frame);
}
public static void DoEvents()
{
var frame = new DispatcherFrame();
Dispatcher.CurrentDispatcher.BeginInvoke(DispatcherPriority.Background, new Action(() => {
frame.Continue = false;
}));
Dispatcher.PushFrame(frame);
}
public static void Wait(System.Windows.Threading.Dispatcher Dispatcher, int Milliseconds)
{
var Frame = new DispatcherFrame();
ThreadPool.QueueUserWorkItem(State =>
{
Thread.Sleep(Milliseconds);
Frame.Continue = false;
});
MessageBox.Show("Complete!");
Dispatcher.PushFrame(Frame);
MessageBox.Show("Complete 2!");
}
/// <summary>
/// Equivalent to DoEvents
/// </summary>
/// <seealso cref="http://msdn.microsoft.com/en-us/library/system.windows.threading.dispatcher.pushframe.aspx"/>
public static void DoEvents(this Dispatcher dispatcher)
{
if (dispatcher.IsDisabled())
{
return;
}
var frame = new DispatcherFrame();
dispatcher.BeginInvoke(DispatcherPriority.ApplicationIdle, new Action <DispatcherFrame>((p) =>
{
p.Continue = false;
}), frame);
Dispatcher.PushFrame(frame);
}
private void DoEvents()
{
if (doing)
{
return;
}
doing = true;
var frame = new System.Windows.Threading.DispatcherFrame();
var callback = new System.Windows.Threading.DispatcherOperationCallback(obj =>
{
((System.Windows.Threading.DispatcherFrame)obj).Continue = false;
return(null);
});
System.Windows.Threading.Dispatcher.CurrentDispatcher.BeginInvoke(System.Windows.Threading.DispatcherPriority.Background, callback, frame);
System.Windows.Threading.Dispatcher.PushFrame(frame);
doing = false;
}
public static void ExitAllFrames()
{
Dispatcher dis = CurrentDispatcher;
for (DispatcherFrame frame = dis.current_frame; frame != null; frame = frame.ParentFrame)
{
if (frame.exit_on_request)
{
frame.Continue = false;
}
else
{
//
// Stop unwinding the frames at the first frame that is
// long running
break;
}
}
}
void RunFrame(DispatcherFrame frame)
{
do
{
while (queue_bits != 0)
{
for (int i = TOP_PRIO; i > 0 && queue_bits != 0; i--)
{
int current_bit = queue_bits & (1 << i);
if (current_bit != 0)
{
PokableQueue q = priority_queues [i];
do
{
DispatcherOperation task;
lock (q)
{
task = (DispatcherOperation)q.Dequeue();
}
task.Invoke();
//
// call hooks.
//
if (task.Status == DispatcherOperationStatus.Aborted)
{
hooks.EmitOperationAborted(task);
}
else
{
hooks.EmitOperationCompleted(task);
}
if (!frame.Continue)
{
return;
}
if (HasShutdownStarted)
{
PerformShutdown();
return;
}
// if we are done with this queue, leave.
lock (q)
{
if (q.Count == 0)
{
queue_bits &= ~(1 << i);
break;
}
}
//
// If a higher-priority task comes in, go do that
//
if (current_bit < (queue_bits & ~current_bit))
{
break;
}
}while (true);
}
}
}
hooks.EmitInactive();
wait.WaitOne();
wait.Reset();
}while (frame.Continue);
}
