Set RtAudio thread name. Limit thread on Linux to 15 characters.

src/rtaudio.cpp

@@ -191,6 +191,8 @@ struct RtAudioDevice : audio::Device {
 		RtAudioDevice* device = (RtAudioDevice*) userData;
 		assert(device);
 
+		system::setThreadName("RtAudio");
+
 		int inputStride = device->getNumInputs();
 		int outputStride = device->getNumOutputs();
 		device->processBuffer((const float*) inputBuffer, inputStride, (float*) outputBuffer, outputStride, nFrames);

src/system.cpp

@@ -560,7 +560,7 @@ int getLogicalCoreCount() {
 
 void setThreadName(const std::string& name) {
 #if defined ARCH_LIN
-	pthread_setname_np(pthread_self(), name.c_str());
+	pthread_setname_np(pthread_self(), name.substr(0, 15).c_str());
 #elif defined ARCH_MAC
 	// Not supported (yet) on Mac
 #elif defined ARCH_WIN