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livetrax/tools/luadevel/luasession.cc
Robin Gareus fa07233a17 mutex 'er up 
Some overzealous locking to track down RequestObject related crashes.

bc0fa4d689 wrongly locked the current event loop's
request_invalidation_lock instead of the invalidation's list lock.

Also Abstract UI is able to delete requests concurrently with with
EventLoop invalidation.
e.g. PortManager::PortRegisteredOrUnregistered  and GlobalPortMatrixWindow
so the lock needs to be exposed.

If this solves various issues, mutexes should to be consolidated
(request_buffer_map_lock + request_invalidation_lock) and be chosen
such that there is as little contention as possible.
2016-12-13 23:47:07 +01:00

460 lines
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#include <stdint.h>
#include <assert.h>
#include <cstdio>
#include <iostream>
#include <string>
#include <list>
#include <vector>
#include <glibmm.h>
#include "pbd/debug.h"
#include "pbd/event_loop.h"
#include "pbd/error.h"
#include "pbd/failed_constructor.h"
#include "pbd/pthread_utils.h"
#include "pbd/reallocpool.h"
#include "pbd/receiver.h"
#include "pbd/transmitter.h"
#include "ardour/ardour.h"
#include "ardour/audioengine.h"
#include "ardour/filename_extensions.h"
#include "ardour/filesystem_paths.h"
#include "ardour/luabindings.h"
#include "ardour/session.h"
#include "ardour/types.h"
#include "ardour/vst_types.h"
#include <readline/readline.h>
#include <readline/history.h>
#include "lua/luastate.h"
#include "LuaBridge/LuaBridge.h"
using namespace std;
using namespace ARDOUR;
using namespace PBD;
static const char* localedir = LOCALEDIR;
static PBD::ScopedConnectionList engine_connections;
static PBD::ScopedConnectionList session_connections;
static Session* session = NULL;
static LuaState* lua;
static bool keep_running = true;
/* extern VST functions */
int vstfx_init (void*) { return 0; }
void vstfx_exit () {}
void vstfx_destroy_editor (VSTState*) {}
class LuaReceiver : public Receiver
{
protected:
void receive (Transmitter::Channel chn, const char * str)
{
const char *prefix = "";
switch (chn) {
case Transmitter::Error:
prefix = "[ERROR]: ";
break;
case Transmitter::Info:
/* ignore */
return;
case Transmitter::Warning:
prefix = "[WARNING]: ";
break;
case Transmitter::Fatal:
prefix = "[FATAL]: ";
break;
case Transmitter::Throw:
/* this isn't supposed to happen */
abort ();
}
/* note: iostreams are already thread-safe: no external
lock required.
*/
std::cout << prefix << str << std::endl;
if (chn == Transmitter::Fatal) {
::exit (9);
}
}
};
class MyEventLoop : public sigc::trackable, public EventLoop
{
public:
MyEventLoop (std::string const& name) : EventLoop (name) {
run_loop_thread = Glib::Threads::Thread::self ();
}
void call_slot (InvalidationRecord* ir, const boost::function<void()>& f) {
if (Glib::Threads::Thread::self () == run_loop_thread) {
cout << string_compose ("%1/%2 direct dispatch of call slot via functor @ %3, invalidation %4\n", event_loop_name(), pthread_name(), &f, ir);
f ();
} else {
cout << string_compose ("%1/%2 queue call-slot using functor @ %3, invalidation %4\n", event_loop_name(), pthread_name(), &f, ir);
assert (!ir);
f (); // XXX TODO, queue and process during run ()
}
}
void run () {
; // TODO process Events, if any
}
Glib::Threads::Mutex& slot_invalidation_mutex () { return request_buffer_map_lock; }
Glib::Threads::Mutex& request_invalidation_mutex() { return request_invalidation_lock; }
private:
Glib::Threads::Thread* run_loop_thread;
Glib::Threads::Mutex request_buffer_map_lock;
Glib::Threads::Mutex request_invalidation_lock;
};
static MyEventLoop *event_loop = NULL;
/* ****************************************************************************/
/* internal helper fn and callbacks */
static int do_audio_midi_setup (uint32_t desired_sample_rate)
{
return AudioEngine::instance ()->start ();
}
static void init ()
{
if (!ARDOUR::init (false, true, localedir)) {
cerr << "Ardour failed to initialize\n" << endl;
::exit (EXIT_FAILURE);
}
assert (!event_loop);
event_loop = new MyEventLoop ("lua");
EventLoop::set_event_loop_for_thread (event_loop);
SessionEvent::create_per_thread_pool ("lua", 4096);
static LuaReceiver lua_receiver;
lua_receiver.listen_to (error);
lua_receiver.listen_to (info);
lua_receiver.listen_to (fatal);
lua_receiver.listen_to (warning);
ARDOUR::Session::AudioEngineSetupRequired.connect_same_thread (engine_connections, &do_audio_midi_setup);
}
static void set_session (ARDOUR::Session *s)
{
session = s;
assert (lua);
lua_State* L = lua->getState ();
LuaBindings::set_session (L, session);
lua->collect_garbage (); // drop references
}
static void unset_session ()
{
session_connections.drop_connections ();
set_session (NULL);
}
static int prepare_engine ()
{
AudioEngine* engine = AudioEngine::instance ();
if (!engine->current_backend ()) {
if (!engine->set_backend ("None (Dummy)", "Unit-Test", "")) {
std::cerr << "Cannot create Audio/MIDI engine\n";
return -1;
}
}
if (!engine->current_backend ()) {
std::cerr << "Cannot create Audio/MIDI engine\n";
return -1;
}
if (engine->running ()) {
engine->stop ();
}
return 0;
}
static int start_engine (uint32_t rate)
{
AudioEngine* engine = AudioEngine::instance ();
if (engine->set_sample_rate (rate)) {
std::cerr << "Cannot set session's samplerate.\n";
return -1;
}
if (engine->start () != 0) {
std::cerr << "Cannot start Audio/MIDI engine\n";
return -1;
}
init_post_engine ();
return 0;
}
static Session * _create_session (string dir, string state, uint32_t rate) // throws
{
if (prepare_engine ()) {
return 0;
}
std::string s = Glib::build_filename (dir, state + statefile_suffix);
if (Glib::file_test (dir, Glib::FILE_TEST_EXISTS)) {
std::cerr << "Session already exists: " << s << "\n";
return 0;
}
if (start_engine (rate)) {
return 0;
}
// TODO add option/bindings for this
BusProfile bus_profile;
bus_profile.master_out_channels = 2;
bus_profile.input_ac = AutoConnectPhysical;
bus_profile.output_ac = AutoConnectMaster;
bus_profile.requested_physical_in = 0; // use all available
bus_profile.requested_physical_out = 0; // use all available
AudioEngine* engine = AudioEngine::instance ();
Session* session = new Session (*engine, dir, state, &bus_profile);
return session;
}
static Session * _load_session (string dir, string state) // throws
{
if (prepare_engine ()) {
return 0;
}
float sr;
SampleFormat sf;
std::string s = Glib::build_filename (dir, state + statefile_suffix);
if (!Glib::file_test (dir, Glib::FILE_TEST_EXISTS)) {
std::cerr << "Cannot find session: " << s << "\n";
return 0;
}
if (Session::get_info_from_path (s, sr, sf) != 0) {
std::cerr << "Cannot get samplerate from session.\n";
return 0;
}
if (start_engine (sr)) {
return 0;
}
AudioEngine* engine = AudioEngine::instance ();
Session* session = new Session (*engine, dir, state);
return session;
}
/* ****************************************************************************/
/* lua bound functions */
static Session* create_session (string dir, string state, uint32_t rate)
{
Session* s = 0;
if (session) {
cerr << "Session already open" << "\n";
return 0;
}
try {
s = _create_session (dir, state, rate);
} catch (failed_constructor& e) {
cerr << "failed_constructor: " << e.what () << "\n";
return 0;
} catch (AudioEngine::PortRegistrationFailure& e) {
cerr << "PortRegistrationFailure: " << e.what () << "\n";
return 0;
} catch (exception& e) {
cerr << "exception: " << e.what () << "\n";
return 0;
} catch (...) {
cerr << "unknown exception.\n";
return 0;
}
Glib::usleep (1000000); // allow signal propagation, callback/thread-pool setup
if (!s) {
return 0;
}
set_session (s);
s->DropReferences.connect_same_thread (session_connections, &unset_session);
return s;
}
static Session* load_session (string dir, string state)
{
Session* s = 0;
if (session) {
cerr << "Session already open" << "\n";
return 0;
}
try {
s = _load_session (dir, state);
} catch (failed_constructor& e) {
cerr << "failed_constructor: " << e.what () << "\n";
return 0;
} catch (AudioEngine::PortRegistrationFailure& e) {
cerr << "PortRegistrationFailure: " << e.what () << "\n";
return 0;
} catch (exception& e) {
cerr << "exception: " << e.what () << "\n";
return 0;
} catch (...) {
cerr << "unknown exception.\n";
return 0;
}
Glib::usleep (1000000); // allow signal propagation, callback/thread-pool setup
if (!s) {
return 0;
}
set_session (s);
s->DropReferences.connect_same_thread (session_connections, &unset_session);
return s;
}
static int set_debug_options (const char *opts)
{
return PBD::parse_debug_options (opts);
}
static void close_session ()
{
delete session;
assert (!session);
}
static int close_session_lua (lua_State *L)
{
if (!session) {
cerr << "No open session" << "\n";
return 0;
}
close_session ();
return 0;
}
static void delay (float d) {
if (d > 0) {
Glib::usleep (d * 1000000);
}
}
static int do_quit (lua_State *L)
{
keep_running = false;
return 0;
}
/* ****************************************************************************/
static void my_lua_print (std::string s) {
std::cout << s << "\n";
}
static void setup_lua ()
{
assert (!lua);
lua = new LuaState ();
lua->Print.connect (&my_lua_print);
lua_State* L = lua->getState ();
LuaBindings::stddef (L);
LuaBindings::common (L);
LuaBindings::session (L);
LuaBindings::osc (L);
luabridge::getGlobalNamespace (L)
.beginNamespace ("_G")
.addFunction ("create_session", &create_session)
.addFunction ("load_session", &load_session)
.addFunction ("close_session", &close_session)
.addFunction ("sleep", &delay)
.addFunction ("quit", &do_quit)
.addFunction ("set_debug_options", &set_debug_options)
.endNamespace ();
// add a Session::close() method
luabridge::getGlobalNamespace (L)
.beginNamespace ("ARDOUR")
.beginClass <Session> ("Session")
.addExtCFunction ("close", &close_session_lua)
.endClass ()
.endNamespace ();
// push instance to global namespace (C++ lifetime)
luabridge::push <AudioEngine *> (L, AudioEngine::create ());
lua_setglobal (L, "AudioEngine");
AudioEngine::instance ()->stop ();
}
int main (int argc, char **argv)
{
init ();
setup_lua ();
using_history ();
std::string histfile = Glib::build_filename (user_config_directory(), "/luahist");
read_history (histfile.c_str());
char *line = NULL;
while (keep_running && (line = readline ("> "))) {
event_loop->run();
if (!strcmp (line, "quit")) {
free (line); line = NULL;
break;
}
if (strlen (line) == 0) {
free (line); line = NULL;
continue;
}
if (lua->do_command (line)) {
// error
}
add_history (line);
event_loop->run();
free (line); line = NULL;
}
free (line);
printf ("\n");
if (session) {
close_session ();
}
engine_connections.drop_connections ();
delete lua;
lua = NULL;
write_history (histfile.c_str());
AudioEngine::instance ()->stop ();
AudioEngine::destroy ();
// cleanup
ARDOUR::cleanup ();
delete event_loop;
pthread_cancel_all ();
return 0;
}
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