prosody
b21d8c286973
util/timer.lua

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util/timer.lua @ 11546:b21d8c286973 0.11

util.xmppstream: Mark bytes for stream closure as handled
author Matthew Wild <mwild1@gmail.com>
date Mon, 10 May 2021 17:02:37 +0100
parent 11263:1274deeab39a
child 11264:2cdcf55c6dd5
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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 local _ENV = nil;
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21 -- luacheck: std none
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22
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23 local _add_task = server.add_task;
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24
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25 local _server_timer;
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26 local _active_timers = 0;
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27 local h = indexedbheap.create();
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28 local params = {};
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29 local next_time = nil;
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30 local function _traceback_handler(err) log("error", "Traceback[timer]: %s", debug_traceback(tostring(err), 2)); end
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31 local function _on_timer(now)
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32 local peek;
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33 local readd;
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34 while true do
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35 peek = h:peek();
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36 if peek == nil or peek > now then break; end
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37 local _, callback, id = h:pop();
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38 local param = params[id];
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39 params[id] = nil;
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40 --item(now, id, _param);
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41 local success, err = xpcall(callback, _traceback_handler, now, id, param);
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42 if success and type(err) == "number" then
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43 if readd then
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44 readd[id] = { callback, err + now };
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45 else
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46 readd = { [id] = { callback, err + now } };
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47 end
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48 params[id] = param;
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49 end
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50 end
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51
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52 if readd then
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53 for id,timer in pairs(readd) do
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54 h:insert(timer[1], timer[2], id);
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55 end
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56 peek = h:peek();
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57 end
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58
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59 if peek ~= nil and _active_timers > 1 and peek == next_time then
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60 -- Another instance of _on_timer already set next_time to the same value,
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61 -- so it should be safe to not renew this timer event
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62 peek = nil;
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63 else
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64 next_time = peek;
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65 end
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66
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67 if peek then
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68 -- peek is the time of the next event
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69 return peek - now;
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70 end
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71 _active_timers = _active_timers - 1;
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72 end
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73 local function add_task(delay, callback, param)
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74 local current_time = get_time();
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75 local event_time = current_time + delay;
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76
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77 local id = h:insert(callback, event_time);
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78 params[id] = param;
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79 if next_time == nil or event_time < next_time then
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80 next_time = event_time;
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81 if _server_timer then
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82 _server_timer:close();
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83 _server_timer = nil;
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84 else
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85 _active_timers = _active_timers + 1;
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86 end
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87 _server_timer = _add_task(next_time - current_time, _on_timer);
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88 end
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89 return id;
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90 end
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91 local function stop(id)
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92 params[id] = nil;
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93 local result, item, result_sync = h:remove(id);
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94 local peek = h:peek();
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95 if peek ~= next_time and _server_timer then
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96 next_time = peek;
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97 _server_timer:close();
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98 if next_time ~= nil then
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99 _server_timer = _add_task(math_max(next_time - get_time(), 0), _on_timer);
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100 end
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101 end
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102 return result, item, result_sync;
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103 end
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104 local function reschedule(id, delay)
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105 local current_time = get_time();
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106 local event_time = current_time + delay;
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107 h:reprioritize(id, delay);
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108 if next_time == nil or event_time < next_time then
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109 next_time = event_time;
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110 _add_task(next_time - current_time, _on_timer);
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111 end
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112 return id;
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113 end
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114
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115 return {
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116 add_task = add_task;
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117 stop = stop;
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118 reschedule = reschedule;
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119 };
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120