prosody
2b3adaa6d38e
util/watchdog.lua

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util/watchdog.lua @ 12469:2b3adaa6d38e

util.strbitop: Reduce scope of functions Equivalent to 'local' in Lua, these functions are exported via the luaopen_ function, which is the only one needing to be visible outside of the file. Pointed out by Link Mauve at some point, but there wasn't really any rush here.
author Kim Alvefur <zash@zash.se>
date Sat, 23 Apr 2022 14:29:43 +0200
parent 8555:4f0f5b49bb03
child 12545:5059a639f61e
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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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0ed617f58404 util.watchdog: Watchdog timer library
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8 local watchdog_methods = {};
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9 local watchdog_mt = { __index = watchdog_methods };
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10
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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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189cfe565d03 util.watchdog: Pass watchdog object to callback so that it doesn't always have to be a closure
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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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26
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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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30
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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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34
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parents: 4891
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35 return {
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36 new = new;
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37 };