On Sun, Sep 18, 2016 at 3:35 AM, Davide Andreoli <d...@gurumeditation.it> wrote: > 2016-09-18 4:30 GMT+02:00 Felipe Magno de Almeida < > felipe.m.alme...@gmail.com>: >> On Sep 17, 2016 3:53 AM, "Davide Andreoli" <d...@gurumeditation.it> wrote:
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[snip] >> The problem with callbacks is not difficult to implement, but difficult to >> free the void* data. It needs two function pointers and the void* data to >> implement correctly and generally. Not that I'm against per se, but >> lifetime is the real problem. > > Indeed the lifetime of the *void data is the trickiest part, a free_data_cb > seems to me the most "correct" way to handle this, not only for bindings > but also for C code. > > Can you explain me how promises solve this problem? where the user is > expected to free the *data in C? in both the success/failure callbacks? Promises are not generic, so their lifetime is known. The user frees it in success/failure callback, yes. > What about chained promises? Chained promises are multiple promises, so each success/failure callback that is registered must free its void* data in its own success/failure callback. Note that the void* data is in this case in efl_promise_then, and not in efl_promise_value_set, the last one has a free callback for the value. [snip] Regards, -- Felipe Magno de Almeida ------------------------------------------------------------------------------ _______________________________________________ enlightenment-devel mailing list enlightenment-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/enlightenment-devel
