private object TryAddInternal( RegistryChangedEventHandler handler, RegistryChangedEventArgs args, out bool needNewThread ) { WatchEntry newEntry; needNewThread = false; lock (_eventsLock) { if (_entries.Count >= MAXIMUM_WAIT_OBJECTS) { needNewThread = true; return(null); } newEntry = WatchEntry.TryCreate(handler, args); if (newEntry == null) { return(null); } _entries.Add(newEntry); } _itemAdded.Set(); return(newEntry); }
/// <summary> /// Starts listening for notifications in the specified registry key. /// /// Each part of the key must be provided separately so that the watcher /// can open its own handle. /// </summary> /// <param name="hive">The hive to watch</param> /// <param name="view">The view to watch</param> /// <param name="key">The key to watch</param> /// <param name="handler">The event handler to invoke</param> /// <param name="recursive">True to watch all subkeys as well</param> /// <param name="notifyValueChange"> /// True to notify if a value is added, removed or updated. /// </param> /// <param name="notifyKeyChange"> /// True to notify if a subkey is added or removed. /// </param> /// <param name="tag"> /// An arbitrary identifier to include with any raised events. /// </param> /// <returns> /// An opaque token that can be pased to Remove, or null if the watcher /// could not be added. /// </returns> public object TryAdd( RegistryHive hive, RegistryView view, string key, RegistryChangedEventHandler handler, bool recursive = false, bool notifyValueChange = true, bool notifyKeyChange = true, object tag = null ) { if (key == null) { throw new ArgumentNullException("key"); } if (handler == null) { throw new ArgumentNullException("handler"); } if (!(notifyValueChange | notifyKeyChange)) { throw new InvalidOperationException("Must wait for at least one type of change"); } var args = new RegistryChangedEventArgs( hive, view, key, recursive, notifyValueChange, notifyKeyChange, tag ); int currentWatcher = -1; RegistryWatcher watcher; bool needNewThread; var token = TryAddInternal(handler, args, out needNewThread); while (needNewThread) { if (_extraWatchers == null) { _extraWatchers = new List <RegistryWatcher>(); } currentWatcher += 1; if (currentWatcher >= _extraWatchers.Count) { watcher = new RegistryWatcher(); _extraWatchers.Add(watcher); } else { watcher = _extraWatchers[currentWatcher]; } token = watcher.TryAddInternal(handler, args, out needNewThread); } return(token); }
public static WatchEntry TryCreate(RegistryChangedEventHandler callback, RegistryChangedEventArgs args) { RegistryKey key; using (var baseKey = RegistryKey.OpenBaseKey(args.Hive, args.View)) { key = baseKey.OpenSubKey(args.Key, RegistryKeyPermissionCheck.Default, RegistryRights.Notify); } if (key == null) { return null; } return new WatchEntry(key, callback, args); }
private WatchEntry( RegistryKey key, RegistryChangedEventHandler callback, RegistryChangedEventArgs args ) { _key = key; _eventHandle = new AutoResetEvent(false); _callback = callback; _args = args; Register(); }
public WatchEntry(RegistryChangedEventHandler callback, RegistryChangedEventArgs args) { using (var baseKey = RegistryKey.OpenBaseKey(args.Hive, args.View)) { _key = baseKey.OpenSubKey(args.Key, RegistryKeyPermissionCheck.Default, RegistryRights.Notify); } if (_key == null) { throw new ArgumentException("Key does not exist"); } _eventHandle = new AutoResetEvent(false); _callback = callback; _args = args; Register(); }
/// <summary> /// Starts listening for notifications in the specified registry key. /// /// Each part of the key must be provided separately so that the watcher /// can open its own handle. /// </summary> /// <param name="hive">The hive to watch</param> /// <param name="view">The view to watch</param> /// <param name="key">The key to watch</param> /// <param name="handler">The event handler to invoke</param> /// <param name="recursive">True to watch all subkeys as well</param> /// <param name="notifyValueChange"> /// True to notify if a value is added, removed or updated. /// </param> /// <param name="notifyKeyChange"> /// True to notify if a subkey is added or removed. /// </param> /// <param name="tag"> /// An arbitrary identifier to include with any raised events. /// </param> /// <exception cref="ArgumentException"> /// The specified registry key does not exist. /// </exception> /// <returns>An opaque token that can be pased to Remove.</returns> /// <remarks> /// This is a thin layer over <see cref="TryAdd"/> that will throw an /// exception when the return value would be null. /// </remarks> public object Add( RegistryHive hive, RegistryView view, string key, RegistryChangedEventHandler handler, bool recursive = false, bool notifyValueChange = true, bool notifyKeyChange = true, object tag = null ) { var res = TryAdd(hive, view, key, handler, recursive, notifyValueChange, notifyKeyChange, tag); if (res == null) { throw new ArgumentException("Key does not exist"); } return res; }
private object AddInternal(RegistryChangedEventHandler handler, RegistryChangedEventArgs args) { WatchEntry newEntry; lock (_eventsLock) { if (_entries.Count >= NativeMethods.MAXIMUM_WAIT_OBJECTS) { return(null); } newEntry = new WatchEntry(handler, args); _entries.Add(newEntry); } _itemAdded.Set(); return(newEntry); }
private object TryAddInternal( RegistryChangedEventHandler handler, RegistryChangedEventArgs args, out bool needNewThread ) { WatchEntry newEntry; needNewThread = false; lock (_eventsLock) { if (_entries.Count >= MAXIMUM_WAIT_OBJECTS) { needNewThread = true; return null; } newEntry = WatchEntry.TryCreate(handler, args); if (newEntry == null) { return null; } _entries.Add(newEntry); } _itemAdded.Set(); return newEntry; }
/// <summary> /// Starts listening for notifications in the specified registry key. /// /// Each part of the key must be provided separately so that the watcher /// can open its own handle. /// </summary> /// <param name="hive">The hive to watch</param> /// <param name="view">The view to watch</param> /// <param name="key">The key to watch</param> /// <param name="handler">The event handler to invoke</param> /// <param name="recursive">True to watch all subkeys as well</param> /// <param name="notifyValueChange"> /// True to notify if a value is added, removed or updated. /// </param> /// <param name="notifyKeyChange"> /// True to notify if a subkey is added or removed. /// </param> /// <param name="tag"> /// An arbitrary identifier to include with any raised events. /// </param> /// <returns> /// An opaque token that can be pased to Remove, or null if the watcher /// could not be added. /// </returns> public object TryAdd( RegistryHive hive, RegistryView view, string key, RegistryChangedEventHandler handler, bool recursive = false, bool notifyValueChange = true, bool notifyKeyChange = true, object tag = null ) { if (key == null) { throw new ArgumentNullException("key"); } if (handler == null) { throw new ArgumentNullException("handler"); } if (!(notifyValueChange | notifyKeyChange)) { throw new InvalidOperationException("Must wait for at least one type of change"); } var args = new RegistryChangedEventArgs( hive, view, key, recursive, notifyValueChange, notifyKeyChange, tag ); int currentWatcher = -1; RegistryWatcher watcher; bool needNewThread; var token = TryAddInternal(handler, args, out needNewThread); while (needNewThread) { if (_extraWatchers == null) { _extraWatchers = new List<RegistryWatcher>(); } currentWatcher += 1; if (currentWatcher >= _extraWatchers.Count) { watcher = new RegistryWatcher(); _extraWatchers.Add(watcher); } else { watcher = _extraWatchers[currentWatcher]; } token = watcher.TryAddInternal(handler, args, out needNewThread); } return token; }
private object AddInternal(RegistryChangedEventHandler handler, RegistryChangedEventArgs args) { WatchEntry newEntry; lock (_eventsLock) { if (_entries.Count >= NativeMethods.MAXIMUM_WAIT_OBJECTS) { return null; } newEntry = new WatchEntry(handler, args); _entries.Add(newEntry); } _itemAdded.Set(); return newEntry; }