prosody
651e945ad971
util/watchdog.lua

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util/watchdog.lua @ 9271:651e945ad971

mod_vcard_legacy: Handle avatar without vcard4 Since vcards are just avatar containers in many modern clients, aborting in case of no vcard4 data is not optimal. The upgrade mechanism needs further tweaks.
author Kim Alvefur <zash@zash.se>
date Fri, 07 Sep 2018 01:04:53 +0200
parent 8555:4f0f5b49bb03
child 12545:5059a639f61e
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0ed617f58404 util.watchdog: Watchdog timer library
Matthew Wild <mwild1@gmail.com>
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1 local timer = require "util.timer";
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2 local setmetatable = setmetatable;
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3 local os_time = os.time;
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4
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5 local _ENV = nil;
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6 -- luacheck: std none
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8 local watchdog_methods = {};
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9 local watchdog_mt = { __index = watchdog_methods };
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11 local function new(timeout, callback)
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12 local watchdog = setmetatable({ timeout = timeout, last_reset = os_time(), callback = callback }, watchdog_mt);
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13 timer.add_task(timeout+1, function (current_time)
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14 local last_reset = watchdog.last_reset;
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15 if not last_reset then
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16 return;
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17 end
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18 local time_left = (last_reset + timeout) - current_time;
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19 if time_left < 0 then
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20 return watchdog:callback();
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21 end
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22 return time_left + 1;
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23 end);
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24 return watchdog;
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25 end
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27 function watchdog_methods:reset()
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28 self.last_reset = os_time();
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29 end
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31 function watchdog_methods:cancel()
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32 self.last_reset = nil;
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33 end
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35 return {
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36 new = new;
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37 };