2 -- Copyright (C) 2008-2010 Matthew Wild
3 -- Copyright (C) 2008-2010 Waqas Hussain
5 -- This project is MIT/X11 licensed. Please see the
6 -- COPYING file in the source package for more information.
9 local indexedbheap = require "util.indexedbheap";
10 local log = require "util.logger".init("timer");
11 local server = require "net.server";
12 local get_time = require "socket".gettime;
14 local debug_traceback = debug.traceback;
15 local tostring = tostring;
16 local xpcall = xpcall;
20 local _add_task = server.add_task;
22 local h = indexedbheap.create();
24 local next_time = nil;
25 local _id, _callback, _now, _param;
26 local function _call() return _callback(_now, _id, _param); end
27 local function _traceback_handler(err) log("error", "Traceback[timer]: %s", debug_traceback(tostring(err), 2)); end
28 local function _on_timer(now)
32 if peek == nil or peek > now then break; end
34 _, _callback, _id = h:pop();
38 --item(now, id, _param); -- FIXME pcall
39 local success, err = xpcall(_call, _traceback_handler);
40 if success and type(err) == "number" then
41 h:insert(_callback, err + now, _id); -- re-add
50 local function add_task(delay, callback, param)
51 local current_time = get_time();
52 local event_time = current_time + delay;
54 local id = h:insert(callback, event_time);
56 if next_time == nil or event_time < next_time then
57 next_time = event_time;
58 _add_task(next_time - current_time, _on_timer);
62 local function stop(id)
66 local function reschedule(id, delay)
67 local current_time = get_time();
68 local event_time = current_time + delay;
69 h:reprioritize(id, delay);
70 if next_time == nil or event_time < next_time then
71 next_time = event_time;
72 _add_task(next_time - current_time, _on_timer);
80 reschedule = reschedule;