chromium/third_party/icu/source/common/servnotf.h

// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/**
 *******************************************************************************
 * Copyright (C) 2001-2014, International Business Machines Corporation and    *
 * others. All Rights Reserved.                                                *
 *******************************************************************************
 */
#ifndef ICUNOTIF_H
#define ICUNOTIF_H

#include "unicode/utypes.h"

#if UCONFIG_NO_SERVICE

U_NAMESPACE_BEGIN

/*
 * Allow the declaration of APIs with pointers to BreakIterator
 * even when break iteration is removed from the build.
 */
class ICUNotifier;

U_NAMESPACE_END

#else

#include "unicode/uobject.h"
#include "unicode/unistr.h"

#include "mutex.h"
#include "uvector.h"

U_NAMESPACE_BEGIN

class U_COMMON_API EventListener : public UObject { … };

/**
 * <p>Abstract implementation of a notification facility.  Clients add
 * EventListeners with addListener and remove them with removeListener.
 * Notifiers call notifyChanged when they wish to notify listeners.
 * This queues the listener list on the notification thread, which
 * eventually dequeues the list and calls notifyListener on each
 * listener in the list.</p>
 *
 * <p>Subclasses override acceptsListener and notifyListener 
 * to add type-safe notification.  AcceptsListener should return
 * true if the listener is of the appropriate type; ICUNotifier
 * itself will ensure the listener is non-null and that the
 * identical listener is not already registered with the Notifier.
 * NotifyListener should cast the listener to the appropriate 
 * type and call the appropriate method on the listener.
 */

class U_COMMON_API ICUNotifier : public UMemory  { … };

U_NAMESPACE_END

/* UCONFIG_NO_SERVICE */
#endif

/* ICUNOTIF_H */
#endif