From c9055547f3df7bdfa3e37b5d0f6c388cbb4d8005 Mon Sep 17 00:00:00 2001
From: Paul Davis <paul@linuxaudiosystems.com>
Date: Thu, 19 Nov 2020 22:16:42 -0700
Subject: [PATCH] set thread-local variable infrastructure for process thread &
 process graph

---
 libs/ardour/ardour/graph.h     |  2 ++
 libs/ardour/ardour/session.h   |  2 ++
 libs/ardour/graph.cc           | 10 ++++++++++
 libs/ardour/session_process.cc | 10 ++++++++++
 4 files changed, 24 insertions(+)

diff --git a/libs/ardour/ardour/graph.h b/libs/ardour/ardour/graph.h
index 85d4ef76bc..901ab779d1 100644
--- a/libs/ardour/ardour/graph.h
+++ b/libs/ardour/ardour/graph.h
@@ -139,6 +139,8 @@ private:
 	/* engine / thread connection */
 	PBD::ScopedConnectionList engine_connections;
 	void                      engine_stopped ();
+
+	void setup_thread_local_variables ();
 };
 
 } // namespace
diff --git a/libs/ardour/ardour/session.h b/libs/ardour/ardour/session.h
index c747860642..d95319a810 100644
--- a/libs/ardour/ardour/session.h
+++ b/libs/ardour/ardour/session.h
@@ -2284,6 +2284,8 @@ private:
 	std::string unnamed_file_name () const;
 
 	GATOMIC_QUAL gint _update_pretty_names;
+
+	void setup_thread_local_variables ();
 };
 
 
diff --git a/libs/ardour/graph.cc b/libs/ardour/graph.cc
index c815dd53e6..d1b1e27c9c 100644
--- a/libs/ardour/graph.cc
+++ b/libs/ardour/graph.cc
@@ -27,6 +27,8 @@
 #include "pbd/debug_rt_alloc.h"
 #include "pbd/pthread_utils.h"
 
+#include "temporal/superclock.h"
+
 #include "ardour/audioengine.h"
 #include "ardour/debug.h"
 #include "ardour/graph.h"
@@ -467,6 +469,7 @@ Graph::helper_thread ()
 	pt->get_buffers ();
 
 	while (!g_atomic_int_get (&_terminate)) {
+		setup_thread_local_variables ();
 		run_one ();
 	}
 
@@ -520,6 +523,7 @@ again:
 
 	/* After setup, the main-thread just becomes a normal worker */
 	while (!g_atomic_int_get (&_terminate)) {
+		setup_thread_local_variables ();
 		run_one ();
 	}
 
@@ -527,6 +531,12 @@ again:
 	delete (pt);
 }
 
+void
+Graph::setup_thread_local_variables ()
+{
+	Temporal::_thread_sample_rate = _session.sample_rate ();
+}
+
 void
 Graph::dump (int chain) const
 {
diff --git a/libs/ardour/session_process.cc b/libs/ardour/session_process.cc
index 2f51103b28..9485143e55 100644
--- a/libs/ardour/session_process.cc
+++ b/libs/ardour/session_process.cc
@@ -35,6 +35,8 @@
 
 #include <glibmm/threads.h>
 
+#include "temporal/superclock.h"
+
 #include "ardour/audioengine.h"
 #include "ardour/auditioner.h"
 #include "ardour/butler.h"
@@ -67,6 +69,12 @@ using namespace std;
 #define TFSM_LOCATE(target,ltd,loop,force) { _transport_fsm->enqueue (new TransportFSM::Event (TransportFSM::Locate,target,ltd,loop,force)); }
 
 
+void
+Session::setup_thread_local_variables ()
+{
+	Temporal::_thread_sample_rate = sample_rate();
+}
+
 /** Called by the audio engine when there is work to be done with JACK.
  * @param nframes Number of samples to process.
  */
@@ -78,6 +86,8 @@ Session::process (pframes_t nframes)
 
 	samplepos_t transport_at_start = _transport_sample;
 
+	setup_thread_local_variables ();
+
 	_silent = false;
 
 	if (processing_blocked()) {