1 files changed, 21 insertions, 0 deletions
diff --git a/lib/System/System.cpp b/lib/System/System.cpp
new file mode 100644
index 0000000..4964921
--- /dev/null
+++ b/lib/System/System.cpp
@@ -0,0 +1,21 @@
+#include <sys/time.h>
+#include <stdint.h>
+#include "System/System.h"
+
+// FIXME: windows support.
+
+static timeval programStart;
+
+LIBFLANG_ABI void libflang_sys_init() {
+  gettimeofday(&programStart, nullptr);
+}
+
+LIBFLANG_ABI float libflang_etime(float *time0, float *time1) {
+  timeval stop;
+  gettimeofday(&stop, nullptr);
+  int64_t diff = stop.tv_usec - programStart.tv_usec;
+
+  *time0 = float(double(diff) / 1000000.0);
+  *time1 = 0.0f;
+  return *time0 + *time1;
+}