Initial release

engine/vendor/vst3sdk/public.sdk/source/vst/hosting/connectionproxy.cpp

@@ -0,0 +1,91 @@
+//-----------------------------------------------------------------------------
+// Project     : VST SDK
+//
+// Category    : Helpers
+// Filename    : public.sdk/source/vst/hosting/connectionproxy.cpp
+// Created by  : Steinberg, 04/2019
+// Description : VST 3 Plug-in connection class
+//
+//-----------------------------------------------------------------------------
+// This file is part of a Steinberg SDK. It is subject to the license terms
+// in the LICENSE file found in the top-level directory of this distribution
+// and at www.steinberg.net/sdklicenses.
+// No part of the SDK, including this file, may be copied, modified, propagated,
+// or distributed except according to the terms contained in the LICENSE file.
+//-----------------------------------------------------------------------------
+
+#include "connectionproxy.h"
+
+namespace Steinberg {
+namespace Vst {
+
+//------------------------------------------------------------------------
+IMPLEMENT_FUNKNOWN_METHODS (ConnectionProxy, IConnectionPoint, IConnectionPoint::iid)
+
+//------------------------------------------------------------------------
+ConnectionProxy::ConnectionProxy (IConnectionPoint* srcConnection)
+: srcConnection (srcConnection) // share it
+{
+	FUNKNOWN_CTOR
+}
+
+//------------------------------------------------------------------------
+ConnectionProxy::~ConnectionProxy ()
+{
+	FUNKNOWN_DTOR
+}
+
+//------------------------------------------------------------------------
+tresult PLUGIN_API ConnectionProxy::connect (IConnectionPoint* other)
+{
+	if (other == nullptr)
+		return kInvalidArgument;
+	if (dstConnection)
+		return kResultFalse;
+
+	dstConnection = other; // share it
+	tresult res = srcConnection->connect (this);
+	if (res != kResultTrue)
+		dstConnection = nullptr;
+	return res;
+}
+
+//------------------------------------------------------------------------
+tresult PLUGIN_API ConnectionProxy::disconnect (IConnectionPoint* other)
+{
+	if (!other)
+		return kInvalidArgument;
+
+	if (other == dstConnection)
+	{
+		if (srcConnection)
+			srcConnection->disconnect (this);
+		dstConnection = nullptr;
+		return kResultTrue;
+	}
+
+	return kInvalidArgument;
+}
+
+//------------------------------------------------------------------------
+tresult PLUGIN_API ConnectionProxy::notify (IMessage* message)
+{
+	if (dstConnection)
+	{
+		// We discard the message if we are not in the UI main thread
+		if (threadChecker && threadChecker->test ())
+			return dstConnection->notify (message);
+	}
+	return kResultFalse;
+}
+
+//------------------------------------------------------------------------
+bool ConnectionProxy::disconnect ()
+{
+	return disconnect (dstConnection) == kResultTrue;
+}
+
+//------------------------------------------------------------------------
+} // Vst
+} // Steinberg
+