cross-thread handling of SessionEvent allocation/deallocation, with widespread consequences

git-svn-id: svn://localhost/ardour2/branches/3.0@6283 d708f5d6-7413-0410-9779-e7cbd77b26cf

gtk2_ardour/ardour_ui.cc

@@ -264,6 +264,7 @@ ARDOUR_UI::ARDOUR_UI (int *argcp, char **argvp[])
 		GainMeter::setup_slider_pix ();
 		RouteTimeAxisView::setup_slider_pix ();
 		SendProcessorEntry::setup_slider_pix ();
+		SessionEvent::create_per_thread_pool ("GUI", 512);
 
 	} catch (failed_constructor& err) {
 		error << _("could not initialize Ardour.") << endmsg;

gtk2_ardour/editor_audio_import.cc

@@ -880,6 +880,7 @@ void *
 Editor::_import_thread (void *arg)
 {
 	PBD::notify_gui_about_thread_creation (pthread_self(), X_("Import"));
+	SessionEvent::create_per_thread_pool ("import events", 64);
 
 	Editor *ed = (Editor *) arg;
 	return ed->import_thread ();

gtk2_ardour/editor_ops.cc

@@ -3653,6 +3653,8 @@ void*
 Editor::_freeze_thread (void* arg)
 {
 	PBD::notify_gui_about_thread_creation (pthread_self(), X_("Freeze"));
+	SessionEvent::create_per_thread_pool ("freeze events", 64);
+
 	return static_cast<Editor*>(arg)->freeze_thread ();
 }
 

gtk2_ardour/editor_timefx.cc

@@ -338,6 +338,7 @@ void*
 Editor::timefx_thread (void *arg)
 {
 	PBD::notify_gui_about_thread_creation (pthread_self(), X_("TimeFX"));
+	SessionEvent::create_per_thread_pool ("timefx events", 64);
 
 	TimeFXDialog* tsd = static_cast<TimeFXDialog*>(arg);
 

gtk2_ardour/sfdb_ui.cc

@@ -734,6 +734,7 @@ void*
 freesound_search_thread_entry (void* arg)
 {
 	PBD::notify_gui_about_thread_creation (pthread_self(), X_("Freesound Search"));
+	SessionEvent::create_per_thread_pool ("freesound events", 64);
 
 	static_cast<SoundFileBrowser*>(arg)->freesound_search_thread ();
 
@@ -763,6 +764,10 @@ SoundFileBrowser::freesound_search_clicked ()
 void
 SoundFileBrowser::freesound_search_thread()
 {
+#if 0
+
+	THIS IS ALL TOTALLY THREAD-ILLEGAL ... YOU CANNOT DO GTK STUFF IN THIS THREAD
+
 #ifdef FREESOUND
 	freesound_list->clear();
 
@@ -810,6 +815,8 @@ SoundFileBrowser::freesound_search_thread()
 	canceling = false;
 	freesound_search_btn.set_label(_("Start Downloading"));
 #endif
+#endif
+
 }
 
 vector<ustring>

libs/ardour/analyser.cc

@@ -19,6 +19,7 @@
 
 #include "ardour/analyser.h"
 #include "ardour/audiofilesource.h"
+#include "ardour/session_event.h"
 #include "ardour/transient_detector.h"
 
 #include "pbd/pthread_utils.h"
@@ -76,6 +77,7 @@ void
 Analyser::work ()
 {
 	PBD::notify_gui_about_thread_creation (pthread_self(), string ("analyser-") + to_string (pthread_self(), std::dec));
+	SessionEvent::create_per_thread_pool ("Analyser", 64);
 
 	while (true) {
 		analysis_queue_lock.lock ();

libs/ardour/ardour/session_event.h

@@ -98,18 +98,17 @@ struct SessionEvent {
 	    return e1->before (*e2);
     }
     
-    void *operator new (size_t) {
-	    return pool.alloc ();
-    }
-    
-    void operator delete (void *ptr, size_t /*size*/) {
-	    pool.release (ptr);
-    }
+    void* operator new (size_t);
+    void  operator delete (void *ptr, size_t /*size*/);
     
     static const nframes_t Immediate = 0;
     
+    static void create_per_thread_pool (const std::string& n, unsigned long nitems);
+    static void init_event_pool ();
+
 private:
-    static MultiAllocSingleReleasePool pool;
+    static PerThreadPool* pool;
+    CrossThreadPool* own_pool;
 };
 
 class SessionEventManager {
@@ -120,8 +119,8 @@ class SessionEventManager {
 	void add_event (nframes64_t action_frame, SessionEvent::Type type, nframes64_t target_frame = 0);
 	void remove_event (nframes64_t frame, SessionEvent::Type type);
 	void clear_events (SessionEvent::Type type);
-
-
+    
+        
   protected:
         RingBuffer<SessionEvent*> pending_events;
 	typedef std::list<SessionEvent *> Events;

libs/ardour/audioengine.cc

@@ -136,6 +136,8 @@ _thread_init_callback (void * /*arg*/)
 	*/
 
 	PBD::notify_gui_about_thread_creation (pthread_self(), X_("Audioengine"), 4096);
+	SessionEvent::create_per_thread_pool (X_("Audioengine"), 512);
+
 	MIDI::JACK_MidiPort::set_process_thread (pthread_self());
 }
 

libs/ardour/butler.cc

@@ -114,6 +114,7 @@ void *
 Butler::_thread_work (void* arg)
 {
 	PBD::notify_gui_about_thread_creation (pthread_self(), X_("Butler"));
+	SessionEvent::create_per_thread_pool ("butler events", 64);
 	return ((Butler *) arg)->thread_work ();
 }
 

libs/ardour/enums.cc

@@ -43,6 +43,8 @@ using namespace PBD;
 using namespace ARDOUR;
 using namespace MIDI;
 
+namespace ARDOUR {
+
 void
 setup_enum_writer ()
 {
@@ -584,6 +586,8 @@ setup_enum_writer ()
 
 }
 
+} /* namespace ARDOUR */
+
 /* deserializing types from ardour/types.h */
 
 std::istream& operator>>(std::istream& o, HeaderFormat& var) 
@@ -795,3 +799,5 @@ std::ostream& operator<<(std::ostream& o, const WaveformShape& var)
 	std::string s = enum_2_string (var);
 	return o << s;
 }
+
+

libs/ardour/export_channel_configuration.cc

@@ -177,6 +177,7 @@ void *
 ExportChannelConfiguration::_write_files (void *arg)
 {
 	notify_gui_about_thread_creation (pthread_self(), "Export post-processing");
+	SessionEvent::create_per_thread_pool ("exporter events", 64);
 
 	// cc can be trated like 'this'
 	WriterThread & cc (*((WriterThread *) arg));

libs/ardour/globals.cc

@@ -72,6 +72,7 @@
 #include "ardour/rc_configuration.h"
 #include "ardour/runtime_functions.h"
 #include "ardour/session.h"
+#include "ardour/session_event.h"
 #include "ardour/source_factory.h"
 #include "ardour/utils.h"
 
@@ -110,6 +111,8 @@ mix_buffers_no_gain_t   ARDOUR::mix_buffers_no_gain = 0;
 
 sigc::signal<void,std::string> ARDOUR::BootMessage;
 
+void ARDOUR::setup_enum_writer ();
+
 int
 ARDOUR::setup_midi ()
 {
@@ -283,15 +286,16 @@ lotsa_files_please ()
 int
 ARDOUR::init (bool use_vst, bool try_optimization)
 {
-	if (!Glib::thread_supported())
+	if (!Glib::thread_supported()) {
 		Glib::thread_init();
-
-	PBD::ID::init ();
-
-	extern void setup_enum_writer ();
+	}
 
 	(void) bindtextdomain(PACKAGE, LOCALEDIR);
 
+	PBD::ID::init ();
+	SessionEvent::init_event_pool ();
+
+
 	/* provide a state version for the few cases that need it and are not
 	   driven by reading state from disk (e.g. undo/redo)
 	*/

libs/ardour/session_events.cc

@@ -37,7 +37,45 @@ using namespace std;
 using namespace ARDOUR;
 using namespace PBD;
 
-MultiAllocSingleReleasePool SessionEvent::pool ("event", sizeof (SessionEvent), 512);
+PerThreadPool* SessionEvent::pool;
+
+void
+SessionEvent::init_event_pool ()
+{
+	pool = new PerThreadPool;
+}
+
+void
+SessionEvent::create_per_thread_pool (const std::string& name, unsigned long nitems)
+{
+	/* this is a per-thread call that simply creates a thread-private ptr to
+	   a CrossThreadPool for use by this thread whenever events are allocated/released
+	   from SessionEvent::pool()
+	*/
+	pool->create_per_thread_pool (name, sizeof (SessionEvent), nitems);
+}
+
+void *
+SessionEvent::operator new (size_t) 
+{
+	CrossThreadPool* p = pool->per_thread_pool ();
+	SessionEvent* ev = static_cast<SessionEvent*> (p->alloc ());
+	ev->own_pool = p;
+	return ev;
+}
+    
+void 
+SessionEvent::operator delete (void *ptr, size_t /*size*/) 
+{
+	Pool* p = pool->per_thread_pool ();
+	SessionEvent* ev = static_cast<SessionEvent*> (ptr);
+	
+	if (p == ev->own_pool) {
+		p->release (ptr);
+	} else {
+		ev->own_pool->push (ev);
+	}
+}
 
 void
 SessionEventManager::add_event (nframes64_t frame, SessionEvent::Type type, nframes64_t target_frame)

libs/ardour/session_midi.cc

@@ -1094,6 +1094,7 @@ Session::midi_thread_work ()
 	vector<MIDI::Port*> ports;
 
 	PBD::notify_gui_about_thread_creation (pthread_self(), X_("MIDI"), 2048);
+	SessionEvent::create_per_thread_pool (X_("MIDI I/O"), 128);
 
 	memset (&rtparam, 0, sizeof (rtparam));
 	rtparam.sched_priority = 9; /* XXX should be relative to audio (JACK) thread */

libs/ardour/source_factory.cc

@@ -59,6 +59,7 @@ static void
 peak_thread_work ()
 {
 	PBD::notify_gui_about_thread_creation (pthread_self(), string ("peakbuilder-") + to_string (pthread_self(), std::dec));
+	SessionEvent::create_per_thread_pool (X_("PeakFile Builder "), 64);
 
 	while (true) {
 

libs/ardour/wscript

@@ -263,7 +263,7 @@ def build(bld):
 	obj.includes     = ['.', '../surfaces/control_protocol', '..']
 	obj.name         = 'libardour'
 	obj.target       = 'ardour'
-	obj.uselib       = 'GLIBMM AUBIO SIGCPP XML UUID JACK SNDFILE SAMPLERATE LRDF OSX'
+	obj.uselib       = 'GLIBMM GTHREAD AUBIO SIGCPP XML UUID JACK SNDFILE SAMPLERATE LRDF OSX'
 	obj.uselib_local = 'libpbd libmidipp libevoral libvamphost libvampplugin libtaglib librubberband'
 	obj.vnum         = LIBARDOUR_LIB_VERSION
 	obj.install_path = os.path.join(bld.env['LIBDIR'], 'ardour3')
@@ -324,7 +324,7 @@ def build(bld):
 			test/testrunner.cpp
 		'''.split()
 		testobj.includes     = obj.includes + ['../pbd/']
-		testobj.uselib       = 'CPPUNIT SIGCPP JACK GLIBMM SAMPLERATE XML LRDF'
+		testobj.uselib       = 'CPPUNIT SIGCPP JACK GLIBMM GTHREAD SAMPLERATE XML LRDF'
 		testobj.uselib_local = 'libpbd libmidipp libardour'
 		testobj.name         = 'libardour-tests'
 		testobj.target       = 'run-tests'

libs/pbd/pbd/pool.h

@@ -38,9 +38,11 @@ class Pool
 	
 	std::string name() const { return _name; }
 
-  private:
-	RingBuffer<void*>* free_list;
+  protected:
+	RingBuffer<void*> free_list;
 	std::string _name;
+
+  private:
 	void *block;
 };
 
@@ -71,4 +73,33 @@ class MultiAllocSingleReleasePool : public Pool
     Glib::Mutex* m_lock;
 };
 
+class CrossThreadPool : public Pool
+{
+  public:
+	CrossThreadPool (std::string n, unsigned long isize, unsigned long nitems);
+
+	void* alloc ();
+	void push (void *);
+	
+  private:
+	RingBuffer<void*> pending;
+};
+
+class PerThreadPool
+{
+  public:
+	PerThreadPool ();
+
+	GPrivate* key() const { return _key; }
+
+	void  create_per_thread_pool (std::string name, unsigned long item_size, unsigned long nitems);
+	CrossThreadPool* per_thread_pool ();
+	
+  private:
+	GPrivate* _key;
+	std::string _name;
+	unsigned long _item_size;
+	unsigned long _nitems;
+};
+
 #endif // __qm_pool_h__

libs/pbd/pool.cc

@@ -30,11 +30,11 @@ using namespace std;
 using namespace PBD;
 
 Pool::Pool (string n, unsigned long item_size, unsigned long nitems)
+	: free_list (nitems)
+	, _name (n)
 {
 	_name = n;
 
-	free_list = new RingBuffer<void*> (nitems);
-
 	/* since some overloaded ::operator new() might use this,
 	   its important that we use a "lower level" allocator to
 	   get more space.  
@@ -48,8 +48,7 @@ Pool::Pool (string n, unsigned long item_size, unsigned long nitems)
 		ptrlist[i] = static_cast<void *> (static_cast<char*>(block) + (i * item_size));
 	}
 
-	free_list->write (ptrlist, nitems);
-
+	free_list.write (ptrlist, nitems);
 	free (ptrlist);
 }
 
@@ -65,7 +64,7 @@ Pool::alloc ()
 
 //	cerr << _name << " pool " << " alloc, thread = " << pthread_name() << " space = " << free_list->read_space() << endl;
 
-	if (free_list->read (&ptr, 1) < 1) {
+	if (free_list.read (&ptr, 1) < 1) {
 		fatal << "CRITICAL: " << _name << " POOL OUT OF MEMORY - RECOMPILE WITH LARGER SIZE!!" << endmsg;
 		/*NOTREACHED*/
 		return 0;
@@ -77,7 +76,7 @@ Pool::alloc ()
 void		
 Pool::release (void *ptr)
 {
-	free_list->write (&ptr, 1);
+	free_list.write (&ptr, 1);
 //	cerr << _name << ": release, now has " << free_list->read_space() << endl;
 }
 
@@ -144,3 +143,64 @@ SingleAllocMultiReleasePool::release (void* ptr)
 	Pool::release (ptr);
 }
 
+/*-------------------------------------------------------*/
+
+static void 
+free_per_thread_pool (void* ptr)
+{
+	cerr << "Deleting a per thread pool @ " << ptr << endl;
+	Pool* pptr = static_cast<Pool*>(ptr);
+	delete pptr;
+}
+ 
+PerThreadPool::PerThreadPool ()
+{
+	{
+		/* for some reason this appears necessary to get glib's thread private stuff to work */
+		GPrivate* key;
+		key = g_private_new (NULL);
+	}
+
+	_key = g_private_new (free_per_thread_pool);
+}
+
+void
+PerThreadPool::create_per_thread_pool (string n, unsigned long isize, unsigned long nitems)
+{
+	Pool* p = new CrossThreadPool (n, isize, nitems);
+	g_private_set (_key, p);
+}
+
+CrossThreadPool*
+PerThreadPool::per_thread_pool ()
+{
+	CrossThreadPool* p = static_cast<CrossThreadPool*> (g_private_get (_key));
+	if (!p) {
+		fatal << "programming error: no per-thread pool \"" << _name << "\" for thread " << pthread_self() << endmsg;
+		/*NOTREACHED*/
+	}
+	return p;
+}
+
+CrossThreadPool::CrossThreadPool  (string n, unsigned long isize, unsigned long nitems)
+	: Pool (n, isize, nitems)
+	, pending (nitems)
+{
+	
+}
+
+void*
+CrossThreadPool::alloc () 
+{
+	void* ptr;
+	while (pending.read (&ptr, 1) == 1) {
+		free_list.write (&ptr, 1);
+	}
+	return Pool::alloc ();
+}
+
+void
+CrossThreadPool::push (void* t) 
+{
+	pending.write (&t, 1);
+}

libs/surfaces/control_protocol/basic_ui.cc

@@ -50,7 +50,11 @@ BasicUI::~BasicUI ()
 void
 BasicUI::register_thread (std::string name)
 {
+	std::string pool_name = name;
+	pool_name += " events";
+
 	PBD::notify_gui_about_thread_creation (pthread_self(), name);
+	SessionEvent::create_per_thread_pool (pool_name, 64);
 }
 
 void

libs/surfaces/mackie/mackie_control_protocol_poll.cc

@@ -42,7 +42,7 @@ bool MackieControlProtocol::probe()
 
 void * MackieControlProtocol::monitor_work()
 {
-	PBD::notify_gui_about_thread_creation (pthread_self(), X_("Mackie"));
+	register_thread (X_("MCU"));
 
 	pthread_setcancelstate (PTHREAD_CANCEL_ENABLE, 0);
 	pthread_setcanceltype (PTHREAD_CANCEL_ASYNCHRONOUS, 0);

libs/surfaces/osc/osc.cc

@@ -374,9 +374,8 @@ OSC::get_unix_server_url()
 void *
 OSC::_osc_receiver(void * arg)
 {
-	PBD::notify_gui_about_thread_creation (pthread_self(), X_("OSC"));
-
-	static_cast<OSC*> (arg)->osc_receiver();
+	static_cast<OSC*>(arg)->register_thread (X_("OSC"));
+	static_cast<OSC*>(arg)->osc_receiver();
 	return 0;
 }
 

libs/surfaces/powermate/i18n.h

@@ -0,0 +1,16 @@
+#ifndef __i18n_h__
+#define __i18n_h__
+
+#include "pbd/compose.h"
+#include "pbd/convert.h"
+#include "gettext.h"
+
+#include <vector>
+#include <string>
+
+#define _(Text)  dgettext (PACKAGE,Text)
+#define N_(Text) gettext_noop (Text)
+#define X_(Text) Text
+#define I18N(Array) PBD::internationalize (PACKAGE, Array)
+
+#endif // __i18n_h__

libs/surfaces/powermate/powermate.cc

@@ -12,12 +12,14 @@
 #include <unistd.h>
 #include <fcntl.h>
 
-#include <i18n.h>
-#include <pbd/xml++.h>
-#include <pbd/error.h>
 #include <glibmm.h>
 
+#include "pbd/pthread_utils.h"
+#include "pbd/xml++.h"
+#include "pbd/error.h"
+
 #include "powermate.h"
+#include "i18n.h"
 
 using namespace ARDOUR;
 using namespace std;
@@ -72,17 +74,18 @@ int open_powermate (const char *dev, int mode)
 
 int find_powermate(int mode)
 {
-  char devname[256];
-  int i, r;
-
-  for(i=0; i<NUM_EVENT_DEVICES; i++){
-    sprintf(devname, "/dev/input/event%d", i);
-    r = open_powermate(devname, mode);
-    if(r >= 0)
-      return r;
-  }
-
-  return -1;
+	char devname[256];
+	int i, r;
+	
+	for (i = 0; i < NUM_EVENT_DEVICES; i++) {
+		sprintf (devname, "/dev/input/event%d", i);
+		r = open_powermate (devname, mode);
+		if (r >= 0) {
+			return r;
+		}
+	}
+	
+	return -1;
 }
 
 PowermateControlProtocol::PowermateControlProtocol (Session& s)
@@ -126,7 +129,7 @@ PowermateControlProtocol::set_active (bool inActivate)
 				return -1;
 			}
 			
-			if (pthread_create (&mThread, 0, SerialThreadEntry, this) == 0) {
+			if (pthread_create_and_store ("Powermate", &mThread, 0, SerialThreadEntry, this) == 0) {
 				_active = true;
 			} else {
 				return -1;
@@ -163,6 +166,7 @@ PowermateControlProtocol::set_state (const XMLNode& /*node*/, int /*version*/)
 void*
 PowermateControlProtocol::SerialThreadEntry (void* arg)
 {
+	static_cast<PowermateControlProtocol*>(arg)->register_thread ("Powermate");
 	return static_cast<PowermateControlProtocol*>(arg)->SerialThread ();
 }
 

libs/surfaces/tranzport/init.cc

@@ -173,7 +173,7 @@ TranzportControlProtocol::monitor_work ()
 	bool first_time = true;
 	uint8_t offline = 0;
 
-	PBD::notify_gui_about_thread_creation (pthread_self(), X_("Tranzport"));
+	register_thread (X_("Tranzport"));
 	pthread_setcancelstate (PTHREAD_CANCEL_ENABLE, 0);
 	pthread_setcanceltype (PTHREAD_CANCEL_ASYNCHRONOUS, 0);
 	rtpriority_set();

libs/surfaces/wiimote/wiimote.cc

@@ -35,10 +35,10 @@ WiimoteControlProtocol::~WiimoteControlProtocol()
 	if (wiimote_handle) {
 		cwiid_close(wiimote_handle);
 	}
+
 	std::cerr << "Wiimote: closed" << std::endl;
 }
 
-
 bool 
 WiimoteControlProtocol::probe()
 {
@@ -166,11 +166,12 @@ WiimoteControlProtocol::update_led_state()
 }
 
 void
-WiimoteControlProtocol::wiimote_main()
+WiimoteControlProtocol::_wiimote_main ()
 {
 	bdaddr_t bdaddr;
 	unsigned char rpt_mode = 0;
-	register_thread("Wiimote Discovery and Callback Thread");
+
+	register_thread ("Wiimote");
 
 wiimote_discovery:
 
@@ -261,6 +262,7 @@ wiimote_discovery:
 
 
 	std::cerr << "Wiimote: main thread stopped" << std::endl;
+	return 0;
 }
 
 

wscript

@@ -465,6 +465,7 @@ def configure(conf):
 					  define_name = 'HAVE_AUDIOUNITS', linkflags = [ '-framework', 'AudioUnit' ])
 
 	autowaf.check_pkg(conf, 'glib-2.0', uselib_store='GLIB', atleast_version='2.2')
+	autowaf.check_pkg(conf, 'gthread-2.0', uselib_store='GTHREAD', atleast_version='2.2')
 	autowaf.check_pkg(conf, 'glibmm-2.4', uselib_store='GLIBMM', atleast_version='2.14.0')
 	if sys.platform == 'darwin':
 		sub_config_and_use(conf, 'libs/appleutility')