Eo: eo_do now returns called func's value + default ret fix.

It's now completely valid to do:
a = eo_do(obj, a_get());

or:
b = eo_do(obj, a_set(1), b_get());

Also, the default return value for eo2 functions is now also returned
when the object is invalid, not just when the object does not match
class.

It's a small refactor that fixed both issues at once.

@feature
@fix

2 files changed, 23 insertions, 12 deletions

diff --git a/src/lib/eo/Eo.h b/src/lib/eo/Eo.h
index 6e6979942d..13179b85de 100644
--- a/src/lib/eo/Eo.h
+++ b/src/lib/eo/Eo.h
@@ -570,16 +570,11 @@ EAPI void _eo_do_end(const Eo **ojb);
 // eo object method calls batch,
 
 #define _eo_do_common(eoid, clsid, is_super, ...)                         \
-  do                                                                       \
-    {                                                                      \
-       const Eo *_eoid_ = eoid;                                            \
-       if (_eo_do_start(_eoid_, clsid, is_super, __FILE__, __FUNCTION__, __LINE__))  \
-         {                                                                 \
-            const Eo *_id_clean_ EO_DO_CLEANUP = _eoid_;                  \
-            __VA_ARGS__;                                                   \
-            (void) _id_clean_;                                             \
-         }                                                                 \
-    } while (0)
+    ({                                                                      \
+       const Eo *_eoid_ EO_DO_CLEANUP = eoid;                             \
+       _eo_do_start(_eoid_, clsid, is_super, __FILE__, __FUNCTION__, __LINE__);  \
+       __VA_ARGS__;                                                   \
+    })
 
 
 #define eo_do(eoid, ...) _eo_do_common(eoid, NULL, EINA_FALSE, __VA_ARGS__)
diff --git a/src/lib/eo/eo.c b/src/lib/eo/eo.c
index a6c356ae97..4acf0f6b28 100644
--- a/src/lib/eo/eo.c
+++ b/src/lib/eo/eo.c
@@ -416,6 +416,7 @@ _eo_do_internal(const Eo *eo_id, const Eo_Class *cur_klass_id,
 EAPI Eina_Bool
 _eo_do_start(const Eo *eo_id, const Eo_Class *cur_klass_id, Eina_Bool is_super, const char *file EINA_UNUSED, const char *func EINA_UNUSED, int line EINA_UNUSED)
 {
+   Eina_Bool ret = EINA_TRUE;
    Eo_Stack_Frame *fptr, *pfptr;
    Eo_Call_Stack *stack = _eo_call_stack_get();
 
@@ -428,11 +429,16 @@ _eo_do_start(const Eo *eo_id, const Eo_Class *cur_klass_id, Eina_Bool is_super,
    fptr++;
 
    if (!_eo_do_internal(eo_id, cur_klass_id, is_super, fptr, pfptr))
-     return EINA_FALSE;
+     {
+        fptr->o.obj = NULL;
+        fptr->cur_klass = NULL;
+
+        ret = EINA_FALSE;
+     }
 
    stack->frame_ptr++;
 
-   return EINA_TRUE;
+   return ret;
 }
 
 EAPI void
@@ -471,6 +477,10 @@ _eo_call_resolve(const char *func_name, const Eo_Op op, Eo_Op_Call_Data *call, c
    if (op == EO_NOOP) return EINA_FALSE;
 
    fptr = _eo_call_stack_get()->frame_ptr;
+
+   if (EINA_UNLIKELY(!fptr->o.obj))
+      return EINA_FALSE;
+
    is_obj = !_eo_is_a_class(fptr->eo_id);
 
    klass = (is_obj) ? fptr->o.obj->klass : fptr->o.kls;
@@ -639,6 +649,9 @@ _eo_api_op_id_get(const void *api_func, const char *file, int line)
 
    Eina_Bool class_ref = _eo_is_a_class(stack->frame_ptr->eo_id);
 
+   if (EINA_UNLIKELY(!stack->frame_ptr->o.obj))
+      return EO_NOOP;
+
    if (class_ref)
      klass = stack->frame_ptr->o.kls;
    else
@@ -800,6 +813,9 @@ _eo_add_internal_end(const char *file, int line, const Eo *eo_id)
         return NULL;
      }
 
+   if (EINA_UNLIKELY(!fptr->o.obj))
+      return NULL;
+
    if (!fptr->o.obj->condtor_done || fptr->o.obj->do_error)
      {
         const _Eo_Class *klass = (fptr->cur_klass) ?