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util/watchdog.lua @ 11731:076ceb405b94
migrator: Silence assert in core.moduleapi
The assert triggers because we're not loading the stanza route, because
we are unlikely to need it during migration.
author | Kim Alvefur <zash@zash.se> |
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date | Thu, 29 Jul 2021 14:11:29 +0200 |
parent | 8555:4f0f5b49bb03 |
child | 12545:5059a639f61e |
rev | line source |
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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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7 |
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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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Kim Alvefur <zash@zash.se>
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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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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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35 return { |
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36 new = new; |
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Kim Alvefur <zash@zash.se>
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37 }; |