/// <summary>
/// Send a delegate to a <see cref="SynchronizationContext"/> to invoke immediately.
/// </summary>
/// <param name="syncContext"></param>
/// <param name="callback"></param>
/// <param name="args"></param>
public static void Invoke(this SynchronizationContext syncContext, Delegate callback, params object[] args)
{
if (callback != null)
{
if (syncContext.CheckAccess())
{
callback.DynamicInvoke(args);
}
else
{
syncContext.Send(o => { callback.DynamicInvoke(args); }, args);
}
}
}
/// <summary>
/// Send an action to a <see cref="SynchronizationContext"/> to invoke immediately.
/// </summary>
/// <param name="syncContext"></param>
/// <param name="callback"></param>
public static void Invoke(this SynchronizationContext syncContext, Action callback)
{
if (callback != null)
{
if (syncContext.CheckAccess())
{
callback();
}
else
{
syncContext.Send(o => { callback(); }, null);
}
}
}
/// <summary>
/// Send a function with a return type to a <see cref="SynchronizationContext"/> to
/// invoke immediately and return the result.
/// </summary>
/// <typeparam name="TResult"></typeparam>
/// <param name="syncContext"></param>
/// <param name="callback"></param>
/// <returns></returns>
public static TResult Invoke <TResult>(this SynchronizationContext syncContext, Func <TResult> callback)
{
TResult retVal = default(TResult);
if (callback != null)
{
if (syncContext.CheckAccess())
{
callback();
}
else
{
syncContext.Send(o => { retVal = callback(); }, retVal);
}
}
return(retVal);
}