/// <summary>
/// Asynchronously executes a delegate on this synchronization context.
/// </summary>
/// <param name="this">The synchronization context.</param>
/// <param name="action">The delegate to execute.</param>
public static Task PostAsync(this SynchronizationContext @this, Action action)
{
_ = @this ?? throw new ArgumentNullException(nameof(@this));
var tcs = TaskCompletionSourceExtensions.CreateAsyncTaskSource <object?>();
@this.Post(state =>
{
try
{
((Action)state)();
tcs.TrySetResult(null);
}
catch (OperationCanceledException ex)
{
tcs.TrySetCanceled(ex.CancellationToken);
}
#pragma warning disable CA1031 // Do not catch general exception types
catch (Exception ex)
#pragma warning restore CA1031 // Do not catch general exception types
{
tcs.TrySetException(ex);
}
}, action);
return(tcs.Task);
}
Task <T> IAsyncWaitQueue <T> .Enqueue()
{
var tcs = TaskCompletionSourceExtensions.CreateAsyncTaskSource <T>();
_queue.AddToBack(tcs);
return(tcs.Task);
}
/// <summary>
/// Creates an async-compatible manual-reset event.
/// </summary>
/// <param name="set">Whether the manual-reset event is initially set or unset.</param>
public AsyncManualResetEvent(bool set)
{
_mutex = new object();
_tcs = TaskCompletionSourceExtensions.CreateAsyncTaskSource <object?>();
if (set)
{
_tcs.TrySetResult(null);
}
}
/// <summary>
/// Resets the event. If the event is already reset, this method does nothing.
/// </summary>
public void Reset()
{
lock (_mutex)
{
if (_tcs.Task.IsCompleted)
{
_tcs = TaskCompletionSourceExtensions.CreateAsyncTaskSource <object?>();
}
}
}
/// <summary>
/// Asynchronously executes a delegate on this synchronization context and returns its result.
/// </summary>
/// <typeparam name="T">The type of the result.</typeparam>
/// <param name="this">The synchronization context.</param>
/// <param name="action">The delegate to execute.</param>
public static Task <T> PostAsync <T>(this SynchronizationContext @this, Func <T> action)
{
var tcs = TaskCompletionSourceExtensions.CreateAsyncTaskSource <T>();
@this.Post(state =>
{
try
{
tcs.SetResult(((Func <T>)state)());
}
catch (Exception ex)
{
tcs.TrySetException(ex);
}
}, action);
return(tcs.Task);
}
/// <summary>
/// Asynchronously executes an asynchronous delegate on this synchronization context.
/// </summary>
/// <param name="this">The synchronization context.</param>
/// <param name="action">The delegate to execute.</param>
public static Task PostAsync(this SynchronizationContext @this, Func <Task> action)
{
var tcs = TaskCompletionSourceExtensions.CreateAsyncTaskSource <object>();
@this.Post(async state =>
{
try
{
await((Func <Task>)state)().ConfigureAwait(false);
tcs.TrySetResult(null);
}
catch (Exception ex)
{
tcs.TrySetException(ex);
}
}, action);
return(tcs.Task);
}
/// <summary>
/// Asynchronously executes a delegate on this synchronization context.
/// </summary>
/// <param name="this">The synchronization context.</param>
/// <param name="action">The delegate to execute.</param>
public static Task PostAsync(this SynchronizationContext @this, Action action)
{
var tcs = TaskCompletionSourceExtensions.CreateAsyncTaskSource <object>();
@this.Post(state =>
{
try
{
((Action)state)();
tcs.TrySetResult(null);
}
catch (Exception ex)
{
tcs.TrySetException(ex);
}
}, action);
return(tcs.Task);
}
/// <summary>
/// Asynchronously executes an asynchronous delegate on this synchronization context and returns its result.
/// </summary>
/// <typeparam name="T">The type of the result.</typeparam>
/// <param name="this">The synchronization context.</param>
/// <param name="action">The delegate to execute.</param>
public static Task <T> PostAsync <T>(this SynchronizationContext @this, Func <Task <T> > action)
{
var tcs = TaskCompletionSourceExtensions.CreateAsyncTaskSource <T>();
@this.Post(async state =>
{
try
{
tcs.SetResult(await((Func <Task <T> >)state)().ConfigureAwait(false));
}
catch (OperationCanceledException ex)
{
tcs.TrySetCanceled(ex.CancellationToken);
}
catch (Exception ex)
{
tcs.TrySetException(ex);
}
}, action);
return(tcs.Task);
}
/// <summary>
/// Asynchronously executes an asynchronous delegate on this synchronization context and returns its result.
/// </summary>
/// <typeparam name="T">The type of the result.</typeparam>
/// <param name="this">The synchronization context.</param>
/// <param name="action">The delegate to execute.</param>
public static Task <T> PostAsync <T>(this SynchronizationContext @this, Func <Task <T> > action)
{
_ = @this ?? throw new ArgumentNullException(nameof(@this));
var tcs = TaskCompletionSourceExtensions.CreateAsyncTaskSource <T>();
@this.Post(async state =>
{
try
{
tcs.SetResult(await((Func <Task <T> >)state)().ConfigureAwait(false));
}
catch (OperationCanceledException ex)
{
tcs.TrySetCanceled(ex.CancellationToken);
}
#pragma warning disable CA1031 // Do not catch general exception types
catch (Exception ex)
#pragma warning restore CA1031 // Do not catch general exception types
{
tcs.TrySetException(ex);
}
}, action);
return(tcs.Task);
}
