prosody
30e2a0107217
util/timer.lua

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util/timer.lua @ 12652:30e2a0107217

moduleapi: Stricter type check for actor in permission check Non-table but truthy values would trigger "attempt to index a foo value" on the next line otherwise
author Kim Alvefur <zash@zash.se>
date Wed, 20 Jul 2022 13:08:07 +0200
parent 11264:2cdcf55c6dd5
child 12975:d10957394a3c
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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Matthew Wild <mwild1@gmail.com>
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1 -- Prosody IM
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b7049746bd29 Update copyright headers for 2010
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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
282ae70db19f Added util/timer.lua - a timer API
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parents:
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6 -- COPYING file in the source package for more information.
282ae70db19f Added util/timer.lua - a timer API
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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();
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.
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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
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.
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40 peek = h:peek();
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.
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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);
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.
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83 params[id] = param;
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84 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.
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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;
7015
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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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101 next_time = peek;
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102 _server_timer:close();
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103 if next_time ~= nil then
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104 _server_timer = _add_task(math_max(next_time - get_time(), 0), _on_timer);
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105 end
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106 end
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107 return result, item, result_sync;
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108 end
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109 local function reschedule(id, delay)
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110 local current_time = get_time();
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111 local event_time = current_time + delay;
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112 h:reprioritize(id, delay);
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parents: 5776
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113 if next_time == nil or event_time < next_time then
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Waqas Hussain <waqas20@gmail.com>
parents: 5776
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114 next_time = event_time;
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115 _add_task(next_time - current_time, _on_timer);
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116 end
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Waqas Hussain <waqas20@gmail.com>
parents: 5776
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117 return id;
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parents:
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118 end
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parents:
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119
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parents: 5776
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120 return {
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121 add_task = add_task;
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122 stop = stop;
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123 reschedule = reschedule;
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124 };
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125