File

util.xml: Break reference to help the GC (fix #1711) LuaExpat uses a registry reference to track handlers, which makes it so that an upvalue like this creates a reference loop that keeps the parser and its handlers from being garbage collected. The same issue has affected util.xmppstream in the past. Code for checking: local xml_parse = require"util.xml".parse; for i = 1, 10000 do xml_parse("<root/>") end collectgarbage(); collectgarbage(); print(collectgarbage("count"), "KiB"); A future release of LuaExpat may fix the underlying issue there.

local methods = {};
local resolver_mt = { __index = methods };

-- Find the next target to connect to, and
-- pass it to cb()
function methods:next(cb)
	if #self.targets == 0 then
		cb(nil);
		return;
	end
	local next_target = table.remove(self.targets, 1);
	cb(unpack(next_target, 1, 4));
end

local function new(targets, conn_type, extra)
	return setmetatable({
		conn_type = conn_type;
		extra = extra;
		targets = targets or {};
	}, resolver_mt);
end

return {
	new = new;
};