prosody
11f14d44438e
util/timer.lua

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util/timer.lua @ 5880:11f14d44438e

util.timer: Import all require upvalues.
author Waqas Hussain <waqas20@gmail.com>
date Wed, 30 Oct 2013 17:58:17 -0400
parent 5879:95f1d5421fbc
child 5898:bf9aba718c01
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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11 local server = require "net.server";
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12 local math_min = math.min
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13 local math_huge = math.huge
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14 local get_time = require "socket".gettime;
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15 local t_insert = table.insert;
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16 local pairs = pairs;
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17 local type = type;
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18 local debug_traceback = debug.traceback;
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19 local tostring = tostring;
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20 local xpcall = xpcall;
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21
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22 local data = {};
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23 local new_data = {};
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24
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25 module "timer"
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26
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27 local _add_task;
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28 if not server.event then
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29 function _add_task(delay, callback)
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30 local current_time = get_time();
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31 delay = delay + current_time;
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32 if delay >= current_time then
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33 t_insert(new_data, {delay, callback});
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34 else
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35 local r = callback(current_time);
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36 if r and type(r) == "number" then
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37 return _add_task(r, callback);
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38 end
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39 end
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40 end
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41
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42 server._addtimer(function()
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43 local current_time = get_time();
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44 if #new_data > 0 then
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45 for _, d in pairs(new_data) do
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46 t_insert(data, d);
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47 end
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48 new_data = {};
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49 end
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50
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51 local next_time = math_huge;
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52 for i, d in pairs(data) do
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53 local t, callback = d[1], d[2];
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54 if t <= current_time then
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55 data[i] = nil;
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56 local r = callback(current_time);
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57 if type(r) == "number" then
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58 _add_task(r, callback);
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59 next_time = math_min(next_time, r);
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60 end
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61 else
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62 next_time = math_min(next_time, t - current_time);
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63 end
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64 end
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65 return next_time;
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66 end);
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67 else
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68 local event = server.event;
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69 local event_base = server.event_base;
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70 local EVENT_LEAVE = (event.core and event.core.LEAVE) or -1;
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71
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72 function _add_task(delay, callback)
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73 local event_handle;
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74 event_handle = event_base:addevent(nil, 0, function ()
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75 local ret = callback(get_time());
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76 if ret then
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77 return 0, ret;
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78 elseif event_handle then
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79 return EVENT_LEAVE;
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80 end
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81 end
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82 , delay);
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83 end
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84 end
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85
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86 --add_task = _add_task;
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87
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88 local h = indexedbheap.create();
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89 local params = {};
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90 local next_time = nil;
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91 local _id, _callback, _now, _param;
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92 local function _call() return _callback(_now, _id, _param); end
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93 local function _traceback_handler(err) log("error", "Traceback[timer]: %s", debug_traceback(tostring(err), 2)); end
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94 local function _on_timer(now)
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95 local peek;
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96 while true do
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97 peek = h:peek();
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98 if peek == nil or peek > now then break; end
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99 local _;
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100 _, _callback, _id = h:pop();
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101 _now = now;
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102 _param = params[_id];
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103 params[_id] = nil;
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104 --item(now, id, _param); -- FIXME pcall
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105 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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106 if success and type(err) == "number" then
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107 h:insert(_callback, err + now, _id); -- re-add
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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108 end
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109 end
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110 next_time = peek;
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111 if peek ~= nil 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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112 return peek - now;
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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113 end
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parents: 5776
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114 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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115 function add_task(delay, callback, param)
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116 local current_time = get_time();
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117 local event_time = current_time + delay;
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118
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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119 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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120 params[id] = param;
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121 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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122 next_time = event_time;
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123 _add_task(next_time - current_time, _on_timer);
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parents: 5776
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124 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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125 return id;
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parents: 5776
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126 end
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parents: 5776
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127 function stop(id)
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128 params[id] = nil;
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129 return h:remove(id);
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parents: 5776
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130 end
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parents: 5776
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131 function reschedule(id, delay)
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132 local current_time = get_time();
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parents: 5776
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133 local event_time = current_time + delay;
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Waqas Hussain <waqas20@gmail.com>
parents: 5776
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134 h:reprioritize(id, delay);
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parents: 5776
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135 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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136 next_time = event_time;
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137 _add_task(next_time - current_time, _on_timer);
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Waqas Hussain <waqas20@gmail.com>
parents: 5776
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138 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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139 return id;
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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140 end
832
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141
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142 return _M;