/// <summary>
/// Dispose handle. This will prevent action being called.
/// </summary>
public void Dispose()
{
WatchToken _token = Interlocked.CompareExchange(ref token, null, token);
if (_token != null)
{
_token.UnregisterCallback(this);
}
action = null;
state = null;
token = null;
}
/// <summary>
/// Enumerate a directory at the given path, if any.
/// </summary>
/// <param name="filter">Relative path that identifies the directory.</param>
/// <returns>Returns the contents of the directory.</returns>
public IChangeToken Watch(string filter)
{
// Assert enabled feature
if (!options.CanObserve)
{
throw new NotSupportedException(nameof(Watch));
}
WatchToken watchToken = new WatchToken();
IFileSystemObserver observerHandle = FileSystem.Observe(filter, watchToken, null, null, token);
Interlocked.CompareExchange(ref watchToken.observerHandle, observerHandle, null);
return(watchToken);
}
public CallbackHandle(WatchToken token, Action <object> action, object state)
{
this.token = token;
this.action = action;
this.state = state;
}
