Re: opaque pointers and metatype
- From: Richard Hundt <richardhundt@xxxxxxxxx>
- To: luajit@xxxxxxxxxxxxx
- Date: Mon, 03 Mar 2014 09:37:00 +0100
Sorry for the self reply, I'm just not sure if my previous post was
clear, so here's a commented version:
local ffi = require('ffi')
ffi.cdef"typedef struct foo_ foo_t;" -- LuaJIT has no idea how big this is
ffi.metatype(ffi.typeof('foo_t'), {
__index = {
greet = function(self)
print("Hey, ima:", self) -- Hey, ima: cdata<struct foo_ *>: NULL
end
}
})
local f = ffi.new('foo_t*[1]') -- &opaque* (i.e. void*[1])
local g = f[0] -- opaque* (i.e. void*)
g:greet() -- but this still works (i.e. LuaJIT rocks!)
HTH
-R
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