Tempo ramps - fix music-locked meter drags.

[ardour.git] / libs / ardour / ardour / internal_return.h

diff --git a/libs/ardour/ardour/internal_return.h b/libs/ardour/ardour/internal_return.h
index 1dff465cba09ed62d1455718d75dca607036fa2e..d12b330e37d9a6bc5c3bd2037ba968f8bc03138d 100644 (file)
--- a/libs/ardour/ardour/internal_return.h
+++ b/libs/ardour/ardour/internal_return.h
@@ -29,7 +29,7 @@ namespace ARDOUR {
 
 class InternalSend;
 
-class InternalReturn : public Return
+class LIBARDOUR_API InternalReturn : public Return
 {
   public:
        InternalReturn (Session&);
@@ -39,7 +39,7 @@ class InternalReturn : public Return
 
        void run (BufferSet& bufs, framepos_t start_frame, framepos_t end_frame, pframes_t nframes, bool);
        bool configure_io (ChanCount, ChanCount);
-       bool can_support_io_configuration (const ChanCount& in, ChanCount& out) const;
+       bool can_support_io_configuration (const ChanCount& in, ChanCount& out);
 
        void add_send (InternalSend *);
        void remove_send (InternalSend *);
@@ -47,6 +47,8 @@ class InternalReturn : public Return
   private:
        /** sends that we are receiving data from */
        std::list<InternalSend*> _sends;
+       /** mutex to protect _sends */
+       Glib::Threads::Mutex _sends_mutex;
 };
 
 } // namespace ARDOUR