X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=libs%2Fardour%2Fardour%2Finternal_return.h;h=d12b330e37d9a6bc5c3bd2037ba968f8bc03138d;hb=36ec551a8ad66a99723f54d3149cbcf30d31c077;hp=1dff465cba09ed62d1455718d75dca607036fa2e;hpb=bbf028880f0fbcfea332f62ca2248da2335e37e5;p=ardour.git

diff --git a/libs/ardour/ardour/internal_return.h b/libs/ardour/ardour/internal_return.h
index 1dff465cba..d12b330e37 100644
--- 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