/// <summary>
/// Executes the specified <paramref name="func"/> on the <paramref name="synchronizationContext"/> and returns the result
/// </summary>
/// <typeparam name="TResult">The return type of <paramref name="func"/></typeparam>
/// <param name="synchronizationContext">The <see cref="SynchronizationContext"/></param>
/// <param name="func">The <see cref="Func{TResult}"/></param>
/// <returns>The result of <paramref name="func"/></returns>
public static Task <TResult> ExecuteAsync <TResult>(this SynchronizationContext synchronizationContext, Func <TResult> func)
{
if (synchronizationContext == null || SynchronizationContext.Current == synchronizationContext)
{
return(Task.FromResult(func()));
}
var completion = new TaskCompletionSource <TResult>();
synchronizationContext.Post(state => completion.AttemptSetResult(func), null);
return(completion.Task);
}
/// <summary>
/// Executes the specified <paramref name="action"/> on the specified <paramref name="synchronizationContext"/>
/// </summary>
/// <param name="synchronizationContext">The <see cref="SynchronizationContext"/></param>
/// <param name="action">The <see cref="Action"/></param>
public static Task ExecuteAsync(this SynchronizationContext synchronizationContext, Action action)
{
if (synchronizationContext == null || SynchronizationContext.Current == synchronizationContext)
{
action();
return(Task.CompletedTask);
}
var completion = new TaskCompletionSource <object>();
synchronizationContext.Post(state => completion.AttemptSetResult(action), null);
return(completion.Task);
}
