Add Engine::getFrame().

include/engine/Engine.hpp

@@ -29,6 +29,7 @@ struct Engine {
 	Call this in your Module::step() method to hint that the operation will take more than ~0.1 ms.
 	*/
 	void yieldWorkers();
+	uint64_t getFrame();
 
 	// Modules
 	/** Adds a module to the rack engine.

src/engine/Engine.cpp

@@ -178,6 +178,7 @@ struct Engine::Internal {
 	bool running = false;
 	float sampleRate;
 	float sampleTime;
+	uint64_t frame = 0;
 
 	int nextModuleId = 0;
 	int nextCableId = 0;
@@ -333,6 +334,8 @@ static void Engine_step(Engine *that) {
 	internal->engineBarrier.wait();
 	Engine_stepModules(that, 0);
 	internal->workerBarrier.wait();
+
+	internal->frame++;
 }
 
 static void Engine_updateExpander(Engine *that, Module::Expander *expander) {
@@ -388,6 +391,7 @@ static void Engine_run(Engine *that) {
 	// system::setThreadRealTime();
 	disableDenormals();
 
+	internal->frame = 0;
 	// Every time the that waits and locks a mutex, it steps this many frames
 	const int mutexSteps = 128;
 	// Time in seconds that the that is rushing ahead of the estimated clock time
@@ -486,6 +490,10 @@ void Engine::yieldWorkers() {
 	internal->workerBarrier.yield = true;
 }
 
+uint64_t Engine::getFrame() {
+	return internal->frame;
+}
+
 void Engine::addModule(Module *module) {
 	assert(module);
 	VIPLock vipLock(internal->vipMutex);