AU: install latency listener

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

diff --git a/libs/ardour/ardour/butler.h b/libs/ardour/ardour/butler.h
index b88b82073605385a3dcc3d8dc6a6ba49500ea34e..44ce7848990f534b3a7261a5997d1415a9a737c7 100644 (file)
--- a/libs/ardour/ardour/butler.h
+++ b/libs/ardour/ardour/butler.h
@@ -20,16 +20,32 @@
 #ifndef __ardour_butler_h__
 #define __ardour_butler_h__
 
-#include <glibmm/thread.h>
+#include <pthread.h>
+
+#include <glibmm/threads.h>
+
+#include "pbd/crossthread.h"
+#include "pbd/ringbuffer.h"
+#include "pbd/pool.h"
+#include "ardour/libardour_visibility.h"
 #include "ardour/types.h"
+#include "ardour/session_handle.h"
 
-namespace ARDOUR {
 
-class Session;
 
-class Butler {
-public:
-       Butler(Session* session);
+namespace ARDOUR {
+
+/**
+ *  One of the Butler's functions is to clean up (ie delete) unused CrossThreadPools.
+ *  When a thread with a CrossThreadPool terminates, its CTP is added to pool_trash.
+ *  When the Butler thread wakes up, we check this trash buffer for CTPs, and if they
+ *  are empty they are deleted.
+ */
+
+class LIBARDOUR_API Butler : public SessionHandleRef
+{
+  public:
+       Butler (Session& session);
        ~Butler();
 
        int  start_thread();
@@ -39,34 +55,51 @@ public:
        void stop();
        void wait_until_finished();
        bool transport_work_requested() const;
+       void drop_references ();
 
-       float read_data_rate() const; ///< in usec
-       float write_data_rate() const;
+        void map_parameters ();
 
-       uint32_t audio_diskstream_buffer_size() const { return audio_dstream_buffer_size; }
+       framecnt_t audio_diskstream_capture_buffer_size() const { return audio_dstream_capture_buffer_size; }
+       framecnt_t audio_diskstream_playback_buffer_size() const { return audio_dstream_playback_buffer_size; }
        uint32_t midi_diskstream_buffer_size()  const { return midi_dstream_buffer_size; }
 
+       bool flush_tracks_to_disk_after_locate (boost::shared_ptr<RouteList>, uint32_t& errors);
+
        static void* _thread_work(void *arg);
        void*         thread_work();
 
        struct Request {
                enum Type {
-                       Wake,
                        Run,
                        Pause,
                        Quit
                };
        };
 
-       Session*     session;
        pthread_t    thread;
-       Glib::Mutex  request_lock;
-       Glib::Cond   paused;
+       bool         have_thread;
+       Glib::Threads::Mutex  request_lock;
+        Glib::Threads::Cond   paused;
        bool         should_run;
        mutable gint should_do_transport_work;
-       int          request_pipe[2];
-       uint32_t     audio_dstream_buffer_size;
+       framecnt_t   audio_dstream_capture_buffer_size;
+       framecnt_t   audio_dstream_playback_buffer_size;
        uint32_t     midi_dstream_buffer_size;
+       RingBuffer<CrossThreadPool*> pool_trash;
+
+private:
+       void empty_pool_trash ();
+       void config_changed (std::string);
+
+       bool flush_tracks_to_disk_normal (boost::shared_ptr<RouteList>, uint32_t& errors);
+
+       /**
+        * Add request to butler thread request queue
+        */
+       void queue_request (Request::Type r);
+
+       CrossThreadChannel _xthread;
+
 };
 
 } // namespace ARDOUR