qt_dictionary_iterator_next(3)

💖 qt_dictionary_iterator_next — bestie, let's advance ✨

okay so real talk, this is a page from libqthread (the manual is qt_dictionary_iterator_next(3), in case the header didn't give it away 🎀) and it's literally just: grab the next thing and move forward. that's the whole vibe. let's get into it 🦋

🌸 SYNOPSIS 🌸

#include <qthread/dictionary.h>

list_entry *
qt_dictionary_iterator_next (qt_dictionary_iterator *iter);

like. look at it. one function, one pointer argument, no drama. 💅

✨ DESCRIPTION ✨

so what this does is it advances the iterator and then retrieves the next entry. two things, one function, she's an overachiever fr fr 👑

and the rules for how an entry gets retrieved? exactly the same rules as qt_dictionary_iterator_get(). no new rules, no secret bonus rules, same energy as get(). so if you already know how qt_dictionary_iterator_get() behaves, you already know how this half of the job behaves. iykyk 🫶

🎀 RETURN VALUES 🎀

it returns the entry that the iterator points to after advancing. so the order matters, bestie — it moves first, then hands you the goods. ✨

⚠️ now the spicy part. in racy concurrent situations, if the item the iterator was pointing at got deleted from the dictionary out from under you, multiple outcomes are possible. 😭 like, it's giving chaos: - the next element in the dictionary may be returned 🍓 - or NULL may be returned 💀 - OR an error may be returned 🙈 but — and this is the one (1) promise it makes — it may not crash. periodt. no cap, that's the guarantee. everything else is a vibe check you might fail. 🌈

👑 SEE ALSO 👑

the whole squad, all of them, no one left behind 💜:

• qt_dictionary_create(3)
• qt_dictionary_delete(3)
• qt_dictionary_destroy(3)
• qt_dictionary_end(3)
• qt_dictionary_get(3)
• qt_dictionary_iterator_copy(3)
• qt_dictionary_iterator_create(3)
• qt_dictionary_iterator_destroy(3)
• qt_dictionary_iterator_equals(3)
• qt_dictionary_iterator_get(3)
• qt_dictionary_put(3)
• qt_dictionary_put_if_absent(3)

and that's the page!! this was libqthread, dated AUGUST 2012, and yes she's an icon from 2012 still serving main character energy in qt_dictionary_iterator_next(3) 🌟 mwah, go advance your iterator responsibly bestie 💖✨🧚