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-- EFL LuaJIT bindings: Eina (accessor module)
-- For use with Elua
local ffi = require("ffi")
local C = ffi.C
ffi.cdef [[
typedef struct _Eina_Accessor Eina_Accessor;
typedef unsigned char Eina_Bool;
void eina_accessor_free (Eina_Accessor *accessor);
Eina_Bool eina_accessor_data_get (Eina_Accessor *accessor,
unsigned int position,
void **data);
Eina_Bool eina_accessor_lock (Eina_Accessor *accessor);
Eina_Bool eina_accessor_unlock (Eina_Accessor *accessor);
Eina_Accessor *eina_accessor_clone (Eina_Accessor *accessor);
void *eina_accessor_container_get(Eina_Accessor *accessor);
]]
local cutil = require("cutil")
local util = require("util")
local M = {}
local eina
local init = function()
eina = util.lib_load("eina")
end
local shutdown = function()
util.lib_unload("eina")
end
ffi.metatype("Eina_Accessor", {
__index = {
free = function(self) eina.eina_accessor_free(ffi.gc(self, nil)) end,
data_get = function(self, position)
local data = ffi.new("void*[1]")
local r = eina.eina_accessor_data_get(self, position - 1, data)
if r == 0 then return nil end
return data[0]
end,
lock = function(self) return eina.eina_accessor_lock (self) ~= 0 end,
unlock = function(self) return eina.eina_accessor_unlock(self) ~= 0 end,
clone = function(self)
local v = eina.eina_accessor_clone(self)
if v == nil then return nil end
return v
end,
container_get = function(self)
local v = eina.eina_accessor_container_get(self)
if v == nil then return nil end
return v
end
}
})
cutil.init_module(init, shutdown)
local dgetmt = debug.getmetatable
M.Accessor = util.Readonly_Object:clone {
__ctor = function(self, selfmt, acc)
-- prevent null stuff
if acc == nil then acc = nil end
if acc then ffi.gc(acc, acc.free) end
selfmt.__eq = function(self, other)
return selfmt.__accessor == dgetmt(other).__accessor
end
selfmt.__call = function(self)
return self:next()
end
local oi = selfmt.__index
selfmt.__index = function(self, name)
if type(name) == "number" then return self:data_get(name) end
return oi[name]
end
selfmt.__accessor = acc
end,
free = function(self)
self = dgetmt(self)
if not self.__accessor then return end
self.__accessor:free()
self.__accessor = nil
end,
lock = function(self)
self = dgetmt(self)
if not self.__accessor then return false end
return self.__accessor:lock()
end,
unlock = function(self)
self = dgetmt(self)
if not self.__accessor then return false end
return self.__accessor:unlock()
end,
clone = function(self)
self = dgetmt(self)
if not self.__accessor then return nil end
return self.__protos[1](self.__accessor:clone())
end,
data_get = function(self, pos)
self = dgetmt(self)
if not self.__accessor then return nil end
return self.__accessor:data_get(pos)
end,
container_get = function(self)
self = dgetmt(self)
if not self.__accessor then return end
return self.__accessor:container_get()
end,
each = function(self)
local acc = dgetmt(self).__accessor
if not acc then return nil end
local cnt = 0
return function()
cnt = cnt + 1
local v = self:data_get(cnt)
if v then return cnt, v end
end
end
}
return M
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