local event = require "net.server".event;

local _add_task;

if not event then

	function _add_task(delay, func)

		local current_time = get_time();

		delay = delay + current_time;

		if delay >= current_time then

			t_insert(new_data, {delay, func});

		else

			func();

		end

	end

	ns_addtimer(function()

		local current_time = get_time();

		if #new_data > 0 then

			for _, d in pairs(new_data) do

				t_insert(data, d);

			end

			new_data = {};

		end

		for i, d in pairs(data) do

			local t, func = d[1], d[2];

			if t <= current_time then

				data[i] = nil;

				local r = func(current_time);

				if type(r) == "number" then _add_task(r, func); end

			end

		end

	end);

else

	local EVENT_LEAVE = (event.core and event.core.LEAVE) or -1;

	function _add_task(delay, func)

		event.base:addevent(nil, event.EV_TIMEOUT, function ()

			local ret = func();

			if ret then

				_add_task(ret, func);

			else

				return EVENT_LEAVE;

			end

		end

		, delay);

	end