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util/watchdog.lua @ 12352:bad813103cd4
prosody.cfg.lua.dist: Remove comment about mod_*.lua above modules_enabled
This is a very old statement, but people generally don't need to check for the
files, and shouldn't be encouraged to put them in Prosody's source dir. The
installer will be the way forward for most people, and hg for the rest.
Manually moving files into the right place is not something most users should
be doing.
author | Matthew Wild <mwild1@gmail.com> |
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date | Thu, 03 Mar 2022 10:24:59 +0000 |
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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vairious: Add annotation when an empty environment is set [luacheck]
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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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37 }; |