File

util/watchdog.lua @ 8842:463505cc75d5

MUC: Revert unstable MUC commits since 0.10.1 These have caused too many issue reports to be included in the stable branch at this time. Affected issues: #345, #397 Reverted commits: dcd53a565c01 6d4b0895f76d 1b10802a770e 564e897f0790 a7221ada9368 aaff40ec7001 05a3275b6873 c2b99fa134b3 8da11142fabf
author Matthew Wild <mwild1@gmail.com>
date Wed, 30 May 2018 21:33:53 +0100 (2018-05-30)
parent 6777:5de6b93d0190
child 8555:4f0f5b49bb03
line wrap: on
line source
local timer = require "util.timer";
local setmetatable = setmetatable;
local os_time = os.time;

local _ENV = nil;

local watchdog_methods = {};
local watchdog_mt = { __index = watchdog_methods };

local function new(timeout, callback)
	local watchdog = setmetatable({ timeout = timeout, last_reset = os_time(), callback = callback }, watchdog_mt);
	timer.add_task(timeout+1, function (current_time)
		local last_reset = watchdog.last_reset;
		if not last_reset then
			return;
		end
		local time_left = (last_reset + timeout) - current_time;
		if time_left < 0 then
			return watchdog:callback();
		end
		return time_left + 1;
	end);
	return watchdog;
end

function watchdog_methods:reset()
	self.last_reset = os_time();
end

function watchdog_methods:cancel()
	self.last_reset = nil;
end

return {
	new = new;
};