public static IObservable <object> PollValues(this IAdsConnection connection, string instancePath, Type type, int[] args, IObservable <Unit> trigger, Func <Exception, object> errorHandler)
{
string[] symbolPaths = new string[] { instancePath };
DisposableHandleBag bag = new DisposableHandleBag(connection, symbolPaths);
Func <Unit, object> func = delegate(Unit o) {
try
{
return(connection.ReadAny(0xf005, bag.GetHandle(instancePath), type, args));
}
catch (Exception exception)
{
if (errorHandler == null)
{
throw;
}
return(errorHandler(exception));
}
};
Action action = delegate {
bag.Dispose();
bag = null;
};
return(Observable.Finally <object>(Observable.Select <Unit, object>(trigger, func), action));
}
public static IDisposable WriteValues <T>(this IAdsConnection connection, string instancePath, IObservable <T> valueSequence, Action <Exception> errorHandler)
{
string[] symbolPaths = new string[] { instancePath };
DisposableHandleBag bag = new DisposableHandleBag(connection, symbolPaths);
Action <T> action = delegate(T v) {
try
{
uint handle = 0;
if (!bag.TryGetHandle(instancePath, out handle))
{
throw new AdsException($"Handle for '{instancePath}' is not created!");
}
connection.WriteAny((int)handle, v);
}
catch (Exception exception)
{
errorHandler(exception);
}
};
return(ObservableExtensions.Subscribe <T>(valueSequence, action, delegate(Exception ex) {
try
{
if (errorHandler == null)
{
throw ex;
}
errorHandler(ex);
}
finally
{
bag.Dispose();
}
}, delegate {
bag.Dispose();
}));
}
