git subrepo clone --branch=sono6good https://github.com/essej/JUCE.git deps/juce

subrepo:
  subdir:   "deps/juce"
  merged:   "b13f9084e"
upstream:
  origin:   "https://github.com/essej/JUCE.git"
  branch:   "sono6good"
  commit:   "b13f9084e"
git-subrepo:
  version:  "0.4.3"
  origin:   "https://github.com/ingydotnet/git-subrepo.git"
  commit:   "2f68596"

deps/juce/modules/juce_events/broadcasters/juce_ChangeBroadcaster.cpp

@@ -0,0 +1,102 @@
+/*
+  ==============================================================================
+
+   This file is part of the JUCE library.
+   Copyright (c) 2020 - Raw Material Software Limited
+
+   JUCE is an open source library subject to commercial or open-source
+   licensing.
+
+   The code included in this file is provided under the terms of the ISC license
+   http://www.isc.org/downloads/software-support-policy/isc-license. Permission
+   To use, copy, modify, and/or distribute this software for any purpose with or
+   without fee is hereby granted provided that the above copyright notice and
+   this permission notice appear in all copies.
+
+   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
+   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
+   DISCLAIMED.
+
+  ==============================================================================
+*/
+
+namespace juce
+{
+
+ChangeBroadcaster::ChangeBroadcaster() noexcept
+{
+    broadcastCallback.owner = this;
+}
+
+ChangeBroadcaster::~ChangeBroadcaster()
+{
+}
+
+void ChangeBroadcaster::addChangeListener (ChangeListener* const listener)
+{
+    // Listeners can only be safely added when the event thread is locked
+    // You can  use a MessageManagerLock if you need to call this from another thread.
+    JUCE_ASSERT_MESSAGE_MANAGER_IS_LOCKED
+
+    changeListeners.add (listener);
+    anyListeners = true;
+}
+
+void ChangeBroadcaster::removeChangeListener (ChangeListener* const listener)
+{
+    // Listeners can only be safely removed when the event thread is locked
+    // You can  use a MessageManagerLock if you need to call this from another thread.
+    JUCE_ASSERT_MESSAGE_MANAGER_IS_LOCKED
+
+    changeListeners.remove (listener);
+    anyListeners = changeListeners.size() > 0;
+}
+
+void ChangeBroadcaster::removeAllChangeListeners()
+{
+    // Listeners can only be safely removed when the event thread is locked
+    // You can  use a MessageManagerLock if you need to call this from another thread.
+    JUCE_ASSERT_MESSAGE_MANAGER_IS_LOCKED
+
+    changeListeners.clear();
+    anyListeners = false;
+}
+
+void ChangeBroadcaster::sendChangeMessage()
+{
+    if (anyListeners)
+        broadcastCallback.triggerAsyncUpdate();
+}
+
+void ChangeBroadcaster::sendSynchronousChangeMessage()
+{
+    // This can only be called by the event thread.
+    JUCE_ASSERT_MESSAGE_MANAGER_IS_LOCKED
+
+    broadcastCallback.cancelPendingUpdate();
+    callListeners();
+}
+
+void ChangeBroadcaster::dispatchPendingMessages()
+{
+    broadcastCallback.handleUpdateNowIfNeeded();
+}
+
+void ChangeBroadcaster::callListeners()
+{
+    changeListeners.call ([this] (ChangeListener& l) { l.changeListenerCallback (this); });
+}
+
+//==============================================================================
+ChangeBroadcaster::ChangeBroadcasterCallback::ChangeBroadcasterCallback()
+    : owner (nullptr)
+{
+}
+
+void ChangeBroadcaster::ChangeBroadcasterCallback::handleAsyncUpdate()
+{
+    jassert (owner != nullptr);
+    owner->callListeners();
+}
+
+} // namespace juce