Added util/timer.lua - a timer API

1 files changed, 47 insertions, 0 deletions

diff --git a/util/timer.lua b/util/timer.lua
new file mode 100644
index 00000000..889a8c4c
--- /dev/null
+++ b/util/timer.lua
@@ -0,0 +1,47 @@
+-- Prosody IM v0.3
+-- Copyright (C) 2008-2009 Matthew Wild
+-- Copyright (C) 2008-2009 Waqas Hussain
+-- 
+-- This project is MIT/X11 licensed. Please see the
+-- COPYING file in the source package for more information.
+--
+
+
+local ns_addtimer = require "net.server".addtimer;
+local get_time = os.time;
+local t_insert = table.insert;
+local ipairs = ipairs;
+local type = type;
+
+local data = {};
+local new_data = {};
+
+module "timer"
+
+local function _add_task(delay, func)
+	local current_time = get_time();
+	delay = delay + current_time;
+	if delay >= current_time then
+		t_insert(new_data, {delay, func});
+	else func(); end
+end
+
+add_task = _add_task;
+
+ns_addtimer(function()
+	local current_time = get_time();
+	for _, d in ipairs(new_data) do
+		t_insert(data, d);
+	end
+	new_data = {};
+	for i = #data,1 do
+		local t, func = data[i][1], data[i][2];
+		if t <= current_time then
+			data[i] = nil;
+			local r = func();
+			if type(r) == "number" then _add_task(r, func); end
+		end
+	end
+end);
+
+return _M;