initial commit

src/utils.c

@@ -0,0 +1,15 @@
+#include "utils.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/time.h>
+
+void error(const char *msg) {
+  perror(msg);
+  exit(1);
+}
+
+double get_time_ms() {
+  struct timeval tv;
+  gettimeofday(&tv, NULL);
+  return (tv.tv_sec * 1000.0) + (tv.tv_usec / 1000.0);
+}