[Misiur]

Zeex's amx_assembly does all the emit magic behind the scenes. Your idea is good, but take a look here:
http://forum.sa-mp.com/showpost.php?...59&postcount=9
Basically I've done that, but then realised that every single plugin call to native functions, will crash the server. CallLocalFunction doesn't support defines, and that's why it's handy when you have _ALS_ hooks to call (explanation here)