Introduce global default-fade-shape configuration variable

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

diff --git a/libs/ardour/ardour/butler.h b/libs/ardour/ardour/butler.h
index 524651ba28f61c6f0cff29e7f0e7df5ddc30ff19..949668dab3d1f4d82c991861cf92511d1384d548 100644 (file)
--- a/libs/ardour/ardour/butler.h
+++ b/libs/ardour/ardour/butler.h
@@ -20,22 +20,104 @@
 #ifndef __ardour_butler_h__
 #define __ardour_butler_h__
 
-#include <glibmm/thread.h>
+#include <pthread.h>
+
+#include <glibmm/threads.h>
+
+#ifdef PLATFORM_WINDOWS
+#include "pbd/glib_semaphore.h"
+#endif
+
+#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 Butler {
-public:
-       Butler();
+/**
+ *  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();
+       void terminate_thread();
+       void schedule_transport_work();
+       void summon();
+       void stop();
+       void wait_until_finished();
+       bool transport_work_requested() const;
+       void drop_references ();
+
+       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; }
+
+       static void* _thread_work(void *arg);
+       void*         thread_work();
+
+       struct Request {
+               enum Type {
+                       Run,
+                       Pause,
+                       Quit
+               };
+       };
+
        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;
+       framecnt_t   audio_dstream_capture_buffer_size;
+       framecnt_t   audio_dstream_playback_buffer_size;
+       uint32_t     midi_dstream_buffer_size;
+       RingBuffer<CrossThreadPool*> pool_trash;
+
+#ifdef PLATFORM_WINDOWS
+       PBD::atomic_counter m_request_state;
+       PBD::GlibSemaphore   m_request_sem;
+#else
        int          request_pipe[2];
+#endif
+
+private:
+       void empty_pool_trash ();
+       void config_changed (std::string);
+
+#ifndef PLATFORM_WINDOWS
+       int setup_request_pipe ();
+#endif
+
+       /**
+        * return true if there are requests to be processed
+        */
+       bool wait_for_requests ();
+
+       /**
+        * Remove request from butler request queue
+        *
+        * return true if there was another request and req is valid
+        */
+       bool dequeue_request (Request::Type& req);
+
+       /**
+        * Add request to butler thread request queue
+        */
+       void queue_request (Request::Type r);
+
 };
 
 } // namespace ARDOUR