Added get_start_time()

Author: Soroosh129

org.lflang/src/lib/Python/pythontarget.c

@@ -218,6 +218,14 @@ static PyObject* py_get_elapsed_physical_time(PyObject *self, PyObject *args) {
     return PyLong_FromLong(get_elapsed_physical_time());
 }
 
+/**
+ * Return the start time in nanoseconds.
+ */
+instant_t get_start_time();
+static PyObject* py_get_start_time(PyObject *self, PyObject *args) {
+    return PyLong_FromLong(get_start_time());
+}
+
 /**
  * Prototype for the main function.
  */
@@ -720,6 +728,7 @@ static PyMethodDef GEN_NAME(MODULE_NAME,_methods)[] = {
   {"get_logical_time", py_get_logical_time, METH_NOARGS, NULL},
   {"get_physical_time", py_get_physical_time, METH_NOARGS, NULL},
   {"get_elapsed_physical_time", py_get_elapsed_physical_time, METH_NOARGS, NULL},
+  {"get_start_time", py_get_start_time, METH_NOARGS, NULL},
   {"request_stop", py_request_stop, METH_NOARGS, NULL},
   {NULL, NULL, 0, NULL}
 };

org.lflang/src/lib/Python/pythontarget.h

@@ -247,6 +247,11 @@ static PyObject* py_get_physical_time(PyObject *self, PyObject *args);
 instant_t get_elapsed_physical_time();
 static PyObject* py_get_elapsed_physical_time(PyObject *self, PyObject *args);
 
+/**
+ * Return the start time in nanoseconds.
+ */
+static PyObject* py_get_start_time(PyObject *self, PyObject *args);
+
 /**
  * Stop execution at the conclusion of the current logical time.
  */