// Static Methods
/// <summary>
/// Attach to a <see cref="PrecisionInputTimer"/> for the specified <paramref name="framesPerSecond"/>.
/// </summary>
/// <param name="framesPerSecond">Desired frames per second for the input timer.</param>
/// <param name="exceptionHandler">Optional delegate to handle exception reporting from the timer.</param>
/// /// <returns>A <see cref="PrecisionInputTimer"/> that can be used for the specified <paramref name="framesPerSecond"/>.</returns>
public static PrecisionInputTimer Attach(int framesPerSecond, Action <Exception> exceptionHandler = null)
{
PrecisionInputTimer timer;
lock (s_inputTimers)
{
// Get static input timer for given frames per second creating it if needed
if (!s_inputTimers.TryGetValue(framesPerSecond, out timer))
{
try
{
// Create a new precision input timer
timer = new PrecisionInputTimer(framesPerSecond);
timer.ExceptionHandler = exceptionHandler;
// Add timer state for given rate to static collection
s_inputTimers.Add(framesPerSecond, timer);
}
catch (Exception ex)
{
// Process exception for logging
if ((object)exceptionHandler != null)
{
exceptionHandler(new InvalidOperationException("Failed to create precision input timer due to exception: " + ex.Message, ex));
}
else
{
throw;
}
}
}
// Increment reference count for input timer at given frame rate
if ((object)timer != null)
{
timer.AddReference();
}
}
return(timer);
}
/// <summary>
/// Detach from the <see cref="PrecisionInputTimer"/>.
/// </summary>
/// <param name="timer">Timer instance to detach from.</param>
/// <remarks>
/// Timer reference will be set to <c>null</c> after detach.
/// </remarks>
public static void Detach(ref PrecisionInputTimer timer)
{
if ((object)timer != null)
{
lock (s_inputTimers)
{
// Verify static frame rate timer for given frames per second exists
if (s_inputTimers.ContainsKey(timer.FramesPerSecond))
{
// Decrement reference count
timer.RemoveReference();
// If timer is no longer being referenced we stop it and remove it from static collection
if (timer.ReferenceCount == 0)
{
timer.Dispose();
s_inputTimers.Remove(timer.FramesPerSecond);
}
}
}
}
timer = null;
}