made emulator use less cpu

emu/threading.c

@@ -1,3 +1,4 @@
+#define _GNU_SOURCE	// TODO, make portable
 #include "threading.h"
 #include <assert.h>
 
@@ -208,6 +209,13 @@ threadwait(int id)
 	pthread_join(gethandle(id), nil);
 }
 
+void
+threadname(char *name)
+{
+	// TODO: make portable
+	pthread_setname_np(pthread_self(), name);
+}
+
 int
 main(int argc, char *argv[])
 {