prosody
3f31e10e8256
util/timer.lua

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util/timer.lua @ 9251:3f31e10e8256

mod_vcard_legacy: Add translation of email field
author Kim Alvefur <zash@zash.se>
date Sat, 01 Sep 2018 23:45:58 +0200
parent 8995:2e6f7ab97794
child 9562:acf74ad0b795
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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Florian Zeitz <florob@babelmonkeys.de>
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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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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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parents: 5776
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9 local indexedbheap = require "util.indexedbheap";
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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parents: 5776
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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 = 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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parents: 5776
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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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parents: 5776
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26 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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27 local params = {};
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28 local next_time = nil;
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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29 local _id, _callback, _now, _param;
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30 local function _call() return _callback(_now, _id, _param); end
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31 local function _traceback_handler(err) log("error", "Traceback[timer]: %s", debug_traceback(tostring(err), 2)); end
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32 local function _on_timer(now)
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33 local 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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34 while true do
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parents: 5776
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35 peek = h:peek();
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36 if peek == nil or peek > now then break; end
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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parents: 5776
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37 local _;
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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parents: 5776
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38 _, _callback, _id = h:pop();
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parents: 5776
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39 _now = now;
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40 _param = params[_id];
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41 params[_id] = nil;
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parents: 5776
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42 --item(now, id, _param); -- FIXME pcall
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parents: 5776
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43 local success, err = xpcall(_call, _traceback_handler);
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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44 if success and type(err) == "number" 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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parents: 5776
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45 h:insert(_callback, err + now, _id); -- re-add
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46 params[_id] = _param;
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47 end
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48 end
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49
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50 if peek ~= nil and _active_timers > 1 and peek == next_time then
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51 -- Another instance of _on_timer already set next_time to the same value,
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52 -- so it should be safe to not renew this timer event
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53 peek = nil;
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54 else
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55 next_time = peek;
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56 end
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57
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58 if peek then
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59 -- peek is the time of the next event
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60 return peek - now;
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61 end
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62 _active_timers = _active_timers - 1;
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63 end
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64 local function add_task(delay, callback, param)
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65 local current_time = get_time();
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66 local event_time = current_time + delay;
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67
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68 local id = h:insert(callback, event_time);
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69 params[id] = param;
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parents: 5776
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70 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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parents: 5776
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71 next_time = event_time;
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72 if _server_timer then
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73 _server_timer:close();
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74 _server_timer = nil;
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75 else
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76 _active_timers = _active_timers + 1;
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77 end
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78 _server_timer = _add_task(next_time - current_time, _on_timer);
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79 end
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80 return id;
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81 end
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82 local function stop(id)
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parents: 5776
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83 params[id] = nil;
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84 local result, item, result_sync = h:remove(id);
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85 local peek = h:peek();
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86 if peek ~= next_time and _server_timer then
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87 next_time = peek;
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88 _server_timer:close();
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89 if next_time ~= nil then
8762
2f8523bf7ff2 util.timer: Ensure we don't try to schedule negative timeouts (which rightly upset libevent). Fixes #1135
Matthew Wild <mwild1@gmail.com>
parents: 8685
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90 _server_timer = _add_task(math_max(next_time - get_time(), 0), _on_timer);
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91 end
3256c5d00901 util.timer: Use libevent for lightweight timers if available and configured (use_libevent option)
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92 end
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93 return result, item, result_sync;
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94 end
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95 local function reschedule(id, delay)
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Waqas Hussain <waqas20@gmail.com>
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96 local current_time = get_time();
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97 local event_time = current_time + delay;
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Waqas Hussain <waqas20@gmail.com>
parents: 5776
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98 h:reprioritize(id, delay);
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Waqas Hussain <waqas20@gmail.com>
parents: 5776
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99 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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100 next_time = event_time;
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parents: 5877
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101 _add_task(next_time - current_time, _on_timer);
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102 end
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Waqas Hussain <waqas20@gmail.com>
parents: 5776
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103 return id;
832
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parents:
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104 end
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parents:
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105
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Kim Alvefur <zash@zash.se>
parents: 5776
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106 return {
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107 add_task = add_task;
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108 stop = stop;
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109 reschedule = reschedule;
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110 };
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111