py: VM never throws an exception, instead returns a status and value.

Addresses issue #290, and hopefully sets up things to allow generators
throwing exceptions, etc.

1 files changed, 8 insertions, 2 deletions

diff --git a/py/bc.h b/py/bc.h
index 814201160..aac35954d 100644
--- a/py/bc.h
+++ b/py/bc.h
@@ -1,3 +1,9 @@
-mp_obj_t mp_execute_byte_code(const byte *code, const mp_obj_t *args, uint n_args, const mp_obj_t *args2, uint n_args2, uint n_state);
-bool mp_execute_byte_code_2(const byte *code_info, const byte **ip_in_out, mp_obj_t *fastn, mp_obj_t **sp_in_out);
+typedef enum {
+    MP_VM_RETURN_NORMAL,
+    MP_VM_RETURN_YIELD,
+    MP_VM_RETURN_EXCEPTION,
+} mp_vm_return_kind_t;
+
+mp_vm_return_kind_t mp_execute_byte_code(const byte *code, const mp_obj_t *args, uint n_args, const mp_obj_t *args2, uint n_args2, uint n_state, mp_obj_t *ret);
+mp_vm_return_kind_t mp_execute_byte_code_2(const byte *code_info, const byte **ip_in_out, mp_obj_t *fastn, mp_obj_t **sp_in_out);
 void mp_byte_code_print(const byte *code, int len);