prosody
7ae000fc8c07
util/timer.lua

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util/timer.lua @ 13267:7ae000fc8c07 0.12

mod_muc_mam: Improve wording of enable setting Suggested by jstein in the chat This option label is used by XMPP clients to explain what the option does. a) The user should know where the data is archived. b) The user needs a statement that can be enabled/disabled by the variable. A question would have the wrong logic here.
author Kim Alvefur <zash@zash.se>
date Sun, 15 Oct 2023 14:43:11 +0200
parent 11264:2cdcf55c6dd5
child 12975:d10957394a3c
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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07d0a3a75c8a 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 local pairs = pairs;
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19
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20 if server.timer then
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21 -- The selected net.server implements this API, so defer to that
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22 return server.timer;
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23 end
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24
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25 local _ENV = nil;
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26 -- luacheck: std none
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27
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28 local _add_task = server.add_task;
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29
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30 local _server_timer;
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31 local _active_timers = 0;
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32 local h = indexedbheap.create();
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33 local params = {};
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34 local next_time = nil;
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35 local function _traceback_handler(err) log("error", "Traceback[timer]: %s", debug_traceback(tostring(err), 2)); end
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36 local function _on_timer(now)
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37 local peek;
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38 local readd;
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39 while true do
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40 peek = h:peek();
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41 if peek == nil or peek > now then break; end
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42 local _, callback, id = h:pop();
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43 local param = params[id];
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44 params[id] = nil;
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45 --item(now, id, _param);
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46 local success, err = xpcall(callback, _traceback_handler, now, id, param);
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47 if success and type(err) == "number" then
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48 if readd then
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49 readd[id] = { callback, err + now };
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50 else
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51 readd = { [id] = { callback, err + now } };
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52 end
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53 params[id] = param;
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54 end
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55 end
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56
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57 if readd then
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58 for id,timer in pairs(readd) do
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59 h:insert(timer[1], timer[2], id);
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60 end
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61 peek = h:peek();
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62 end
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63
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64 if peek ~= nil and _active_timers > 1 and peek == next_time then
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65 -- Another instance of _on_timer already set next_time to the same value,
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66 -- so it should be safe to not renew this timer event
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67 peek = nil;
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68 else
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69 next_time = peek;
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70 end
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71
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72 if peek then
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73 -- peek is the time of the next event
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74 return peek - now;
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75 end
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76 _active_timers = _active_timers - 1;
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77 end
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78 local function add_task(delay, callback, param)
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79 local current_time = get_time();
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80 local event_time = current_time + delay;
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81
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82 local id = h:insert(callback, event_time);
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83 params[id] = param;
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84 if next_time == nil or event_time < next_time then
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85 next_time = event_time;
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86 if _server_timer then
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87 _server_timer:close();
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88 _server_timer = nil;
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89 else
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90 _active_timers = _active_timers + 1;
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91 end
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92 _server_timer = _add_task(next_time - current_time, _on_timer);
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93 end
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94 return id;
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95 end
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96 local function stop(id)
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97 params[id] = nil;
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98 local result, item, result_sync = h:remove(id);
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99 local peek = h:peek();
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100 if peek ~= next_time and _server_timer then
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Kim Alvefur <zash@zash.se>
parents: 6932
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101 next_time = peek;
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Kim Alvefur <zash@zash.se>
parents: 6932
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102 _server_timer:close();
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Kim Alvefur <zash@zash.se>
parents: 6932
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103 if next_time ~= nil then
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Matthew Wild <mwild1@gmail.com>
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104 _server_timer = _add_task(math_max(next_time - get_time(), 0), _on_timer);
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3256c5d00901 util.timer: Use libevent for lightweight timers if available and configured (use_libevent option)
Matthew Wild <mwild1@gmail.com>
parents: 1871
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105 end
3256c5d00901 util.timer: Use libevent for lightweight timers if available and configured (use_libevent option)
Matthew Wild <mwild1@gmail.com>
parents: 1871
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106 end
7015
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Kim Alvefur <zash@zash.se>
parents: 6932
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107 return result, item, result_sync;
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Kim Alvefur <zash@zash.se>
parents: 6791
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108 end
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parents: 6481 6777
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109 local function reschedule(id, delay)
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Waqas Hussain <waqas20@gmail.com>
parents: 5776
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110 local current_time = get_time();
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Waqas Hussain <waqas20@gmail.com>
parents: 5776
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111 local event_time = current_time + delay;
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Waqas Hussain <waqas20@gmail.com>
parents: 5776
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112 h:reprioritize(id, delay);
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Waqas Hussain <waqas20@gmail.com>
parents: 5776
diff changeset
113 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
diff changeset
114 next_time = event_time;
5878
2b1c0c0a2ea6 util.timer: Fix variable name typo.
Waqas Hussain <waqas20@gmail.com>
parents: 5877
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115 _add_task(next_time - current_time, _on_timer);
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Kim Alvefur <zash@zash.se>
parents: 6791
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116 end
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Waqas Hussain <waqas20@gmail.com>
parents: 5776
diff changeset
117 return id;
832
282ae70db19f Added util/timer.lua - a timer API
Waqas Hussain <waqas20@gmail.com>
parents:
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118 end
282ae70db19f Added util/timer.lua - a timer API
Waqas Hussain <waqas20@gmail.com>
parents:
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119
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5de6b93d0190 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: 5776
diff changeset
120 return {
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Kim Alvefur <zash@zash.se>
parents: 6481 6777
diff changeset
121 add_task = add_task;
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Kim Alvefur <zash@zash.se>
parents: 6481 6777
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122 stop = stop;
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Kim Alvefur <zash@zash.se>
parents: 6481 6777
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123 reschedule = reschedule;
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Kim Alvefur <zash@zash.se>
parents: 5776
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124 };
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parents: 6481 6777
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125