This API is meant to be used by parts only, and by bindings dealing with
part objects. This patch fixes make check which got broken in the after
the previous one (cxx).
Before screaming in horror (C++...) here's why we may need this:
Efl.Part.part API returns an object that is by definition valid for a
single function call only. Enforcing this in practice is actually quite
hard as all implementation functions must manually take care of the
life-cycle. This is a lot of code in many places and a lot of
opportunities to forget to properly handle that life-cycle. Also, this
means any invalid function call on a part will leak an object.
This API absolutely must remain either "internal" or "beta" and
definitely not become abused by applications. On top of that such an API
can cause great trouble for bindings like C++. As a consequence, only
specially crafted APIs like efl_part() should return an object marked as
auto_unref.
Alternatively this API could be defined in Eo.h or some other
Eo_Internal.h. I placed it in efl_object.eo because it's much more
convenient :) (read: I'm lazy)
****
Performance notes:
Tested with clang & gcc (with -O2), I had a look at the output of perf
top, in particular the asm view. I used eo_bench in a loop. My
conclusions are:
- EINA_LIKELY/UNLIKELY actually works. The jump statement varies
according to the expectation. I highly doubt all those ugly goto in
eo.c / Eo.h are even useful.
- The impact of auto_unref on a call_resolve is so small it doesn't even
appear in the trace. It is significant inside call_end, though
(obviously, that function is just a few lines long). That function
accounts for ~1% to ~4% of all CPU time. The impact of auto_unref in
call_end is ~4% of the function time. This means ~0.16% of all CPU
time (worst measured case). _efl_object_op_api_id_get simply doesn't
show up because of caching, so the extra check there is negligible.
PS: I also tested EINA_LIKELY/UNLIKELY by compiling with -O2 and looking
at the output with objdump. The flag is well respected, and the jump
instructions are what you would expect (no jump for LIKELY and jump for
UNLIKELY). Conclusion: The goto's in eo.c only make the code harder to
read...
Simply pass in the strbuf and don't expect the callee to own it. This
makes things simpler and safer (it'll crash only if the callee frees
said strbuf, and shouldn't leak). efl_ebug_name is new in the upcoming
release, EFL 1.21.
Realised this after talking with Amitesh. Thanks.
See 999dbd9764
And c4769ff898
This allows deleting an object by simply calling efl_unref() on it, even
if there is a parent. Normally the parent is in charge, and you can
request deletion by calling efl_del() or efl_parent_set(NULL).
But in some rare cases, you want to give ownership of an object (@owned)
and still give a parent to that object. efl_unref() should be used (and
would be used by bindings when going out of scope or on garbage
collection), which would then print an error message. This API allows
the specific behaviour.
@feature
This will include the following information, by default:
- class name
- whether the class is an override
- eo id (pointer)
- refcount
- name if one was set (Efl.Object property)
This also supports classes, which is why it's an EAPI in eo.c
and not only a method of Efl.Object
This can be overriden by subclasses using the empty method
Efl.Object.debug_name_override.get
If the function is overriden, then the returned string is used
as is and so it is left to the subclass to include all the
necessary information (as above). This can easily be achieved
by calling efl_debug_name_get(efl_super()) and then concatenating
the strings.
Think of this function as something like Java's toString(), but
only for debugging (i.e. a string class should not just return
its string value).
@feature
We don't need to keep this in eo files anymore because the APIs
using them are now fully in C. This also allows removal of the
event callback builtin from Eolian.
In a few classes, this requires some manual expansion. This should
not break anything but it's also fairly ugly; a better solution
would be appreciated, for now we do this.
Similar changes will be done to a few other Efl.Object APIs as
well at later point.
This improve speed of processing events in genlist scrolling benchmark by 30%
inside the efl_object_event_callback_call code. Not a really big deal as it
goes from 0.9% to 0.6% of the total time spend. Welcome to micro optimization.
Efl.Object.event_callback_call no longer calls legacy smart callbacks;
calling only event callbacks registered with the given event description
pointer.
Create the method Efl.Object.event_callback_legacy_call to inherit the old
behavior from Efl.Object.event_callback_call, calling both Efl.Object events
and legacy smart callbacks.
Update all other files accordingly in order to still supply legacy
callbacks while they are necessary.
Jean-Philippe Andre
Daniel Kolesa
Marcel Hollerbach
Stefan Schmidt
Cedric BAIL
Tom Hacohen
Vitor Sousa