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util/timer.lua @ 10388:d748f0cb45b1
doap: Add version of XEP-0012
author | Kim Alvefur <zash@zash.se> |
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date | Sun, 03 Nov 2019 17:44:14 +0100 |
parent | 9562:acf74ad0b795 |
child | 10981:e6c1e92cc7a7 |
child | 11263:1274deeab39a |
rev | line source |
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1 -- Prosody IM |
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2 -- Copyright (C) 2008-2010 Matthew Wild |
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3 -- Copyright (C) 2008-2010 Waqas Hussain |
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4 -- |
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5 -- This project is MIT/X11 licensed. Please see the |
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6 -- COPYING file in the source package for more information. |
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7 -- |
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8 |
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9 local indexedbheap = require "util.indexedbheap"; |
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10 local log = require "util.logger".init("timer"); |
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net.server, net.timer, net.server_select: Rearrange dependencies between these three modules. server.addtimer() is no longer a public function (renamed to _addtimer) and is not available at all from server_event (compat code removed to prevent traceback) (thanks Nulani)
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11 local server = require "net.server"; |
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12 local get_time = require "util.time".now |
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13 local type = type; |
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14 local debug_traceback = debug.traceback; |
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15 local tostring = tostring; |
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16 local xpcall = require "util.xpcall".xpcall; |
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17 local math_max = math.max; |
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18 |
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19 local _ENV = nil; |
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20 -- luacheck: std none |
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21 |
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22 local _add_task = server.add_task; |
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23 |
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24 local _server_timer; |
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25 local _active_timers = 0; |
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26 local h = indexedbheap.create(); |
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27 local params = {}; |
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28 local next_time = nil; |
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29 local function _traceback_handler(err) log("error", "Traceback[timer]: %s", debug_traceback(tostring(err), 2)); end |
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30 local function _on_timer(now) |
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31 local peek; |
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32 while true do |
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33 peek = h:peek(); |
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34 if peek == nil or peek > now then break; end |
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35 local _, callback, id = h:pop(); |
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36 local param = params[id]; |
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37 params[id] = nil; |
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38 --item(now, id, _param); |
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39 local success, err = xpcall(callback, _traceback_handler, now, id, param); |
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40 if success and type(err) == "number" then |
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41 h:insert(callback, err + now, id); -- re-add |
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42 params[id] = param; |
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43 end |
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44 end |
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45 |
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46 if peek ~= nil and _active_timers > 1 and peek == next_time then |
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47 -- Another instance of _on_timer already set next_time to the same value, |
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48 -- so it should be safe to not renew this timer event |
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49 peek = nil; |
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50 else |
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51 next_time = peek; |
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52 end |
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53 |
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54 if peek then |
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55 -- peek is the time of the next event |
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56 return peek - now; |
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57 end |
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58 _active_timers = _active_timers - 1; |
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59 end |
6791 | 60 local function add_task(delay, callback, param) |
6836 | 61 local current_time = get_time(); |
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62 local event_time = current_time + delay; |
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63 |
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64 local id = h:insert(callback, event_time); |
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65 params[id] = param; |
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66 if next_time == nil or event_time < next_time then |
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67 next_time = event_time; |
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68 if _server_timer then |
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69 _server_timer:close(); |
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70 _server_timer = nil; |
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71 else |
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72 _active_timers = _active_timers + 1; |
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73 end |
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74 _server_timer = _add_task(next_time - current_time, _on_timer); |
6836 | 75 end |
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76 return id; |
6836 | 77 end |
6791 | 78 local function stop(id) |
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79 params[id] = nil; |
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80 local result, item, result_sync = h:remove(id); |
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81 local peek = h:peek(); |
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82 if peek ~= next_time and _server_timer then |
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83 next_time = peek; |
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84 _server_timer:close(); |
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85 if next_time ~= nil then |
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86 _server_timer = _add_task(math_max(next_time - get_time(), 0), _on_timer); |
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87 end |
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88 end |
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89 return result, item, result_sync; |
6836 | 90 end |
6791 | 91 local function reschedule(id, delay) |
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util.timer: Updated to use util.indexedbheap to provide a more complete API. Timers can now be stopped or rescheduled. Callbacks are now pcall'd. Adding/removing timers from within timer callbacks works better. Optional parameter can be passed when creating timer which gets passed to callback, eliminating the need for closures in various timer uses. Timers are now much more lightweight.
Waqas Hussain <waqas20@gmail.com>
parents:
5776
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92 local current_time = get_time(); |
615a0774e4cc
util.timer: Updated to use util.indexedbheap to provide a more complete API. Timers can now be stopped or rescheduled. Callbacks are now pcall'd. Adding/removing timers from within timer callbacks works better. Optional parameter can be passed when creating timer which gets passed to callback, eliminating the need for closures in various timer uses. Timers are now much more lightweight.
Waqas Hussain <waqas20@gmail.com>
parents:
5776
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93 local event_time = current_time + delay; |
615a0774e4cc
util.timer: Updated to use util.indexedbheap to provide a more complete API. Timers can now be stopped or rescheduled. Callbacks are now pcall'd. Adding/removing timers from within timer callbacks works better. Optional parameter can be passed when creating timer which gets passed to callback, eliminating the need for closures in various timer uses. Timers are now much more lightweight.
Waqas Hussain <waqas20@gmail.com>
parents:
5776
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94 h:reprioritize(id, delay); |
615a0774e4cc
util.timer: Updated to use util.indexedbheap to provide a more complete API. Timers can now be stopped or rescheduled. Callbacks are now pcall'd. Adding/removing timers from within timer callbacks works better. Optional parameter can be passed when creating timer which gets passed to callback, eliminating the need for closures in various timer uses. Timers are now much more lightweight.
Waqas Hussain <waqas20@gmail.com>
parents:
5776
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changeset
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95 if next_time == nil or event_time < next_time then |
615a0774e4cc
util.timer: Updated to use util.indexedbheap to provide a more complete API. Timers can now be stopped or rescheduled. Callbacks are now pcall'd. Adding/removing timers from within timer callbacks works better. Optional parameter can be passed when creating timer which gets passed to callback, eliminating the need for closures in various timer uses. Timers are now much more lightweight.
Waqas Hussain <waqas20@gmail.com>
parents:
5776
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96 next_time = event_time; |
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util.timer: Fix variable name typo.
Waqas Hussain <waqas20@gmail.com>
parents:
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97 _add_task(next_time - current_time, _on_timer); |
6836 | 98 end |
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615a0774e4cc
util.timer: Updated to use util.indexedbheap to provide a more complete API. Timers can now be stopped or rescheduled. Callbacks are now pcall'd. Adding/removing timers from within timer callbacks works better. Optional parameter can be passed when creating timer which gets passed to callback, eliminating the need for closures in various timer uses. Timers are now much more lightweight.
Waqas Hussain <waqas20@gmail.com>
parents:
5776
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99 return id; |
832
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Added util/timer.lua - a timer API
Waqas Hussain <waqas20@gmail.com>
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100 end |
282ae70db19f
Added util/timer.lua - a timer API
Waqas Hussain <waqas20@gmail.com>
parents:
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101 |
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util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
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102 return { |
6791 | 103 add_task = add_task; |
104 stop = stop; | |
105 reschedule = reschedule; | |
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util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents:
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106 }; |
6791 | 107 |