ConnectionProxy.cpp

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/**********************************************************************
 
  Audacity: A Digital Audio Editor
 
  @file ConnectionProxy.cpp
 
  @author Vitaly Sverchinsky
 
  @brief Part of Audacity VST3 module
 
**********************************************************************/
 
#include "ConnectionProxy.h"
 
internal::ConnectionProxy::ConnectionProxy(Steinberg::Vst::IConnectionPoint* source)
   : mSource(source)
{
   mThreadId = std::this_thread::get_id();
   FUNKNOWN_CTOR;
}
internal::ConnectionProxy::~ConnectionProxy()
{
   FUNKNOWN_DTOR;
}
 
Steinberg::tresult internal::ConnectionProxy::connect (IConnectionPoint* other)
{
   if(other == nullptr)
      return Steinberg::kInvalidArgument;
   if(mTarget.get() != nullptr)
      return Steinberg::kResultFalse;
 
   //Looks a bit awkward, but the source can send messages to
   //the target during connection
   mTarget = other;
   auto result = mSource->connect(this);
   if(result != Steinberg::kResultOk)
      mTarget = nullptr;
   return result;
}
 
Steinberg::tresult internal::ConnectionProxy::disconnect (IConnectionPoint* other)
{
   if(other == nullptr)
      return Steinberg::kInvalidArgument;
   if(other != mTarget.get())
      return Steinberg::kResultFalse;
 
   auto result = mSource->disconnect(this);
   if(result == Steinberg::kResultOk)
      mTarget = nullptr;
   return result;
}
 
Steinberg::tresult internal::ConnectionProxy::notify (Steinberg::Vst::IMessage* message)
{
   if(mTarget.get() == nullptr ||
      std::this_thread::get_id() != mThreadId)
      return Steinberg::kResultFalse;
 
   return mTarget->notify(message);
}
 
 
IMPLEMENT_FUNKNOWN_METHODS(internal::ConnectionProxy, Steinberg::Vst::IConnectionPoint, Steinberg::Vst::IConnectionPoint::iid);