From 27379bb148766adbfda904a5d786862141060fb7 Mon Sep 17 00:00:00 2001 From: Waqas Hussain Date: Thu, 4 Jun 2009 17:41:55 +0500 Subject: util.uuid: More uniqueness! --- util/uuid.lua | 21 ++++++++++++++++++--- 1 file changed, 18 insertions(+), 3 deletions(-) (limited to 'util/uuid.lua') diff --git a/util/uuid.lua b/util/uuid.lua index fd21dfcc..e928259d 100644 --- a/util/uuid.lua +++ b/util/uuid.lua @@ -7,13 +7,28 @@ -- - local m_random = math.random; local tostring = tostring; +local os_time = os.time; +local os_clock = os.clock; +local sha1 = require "util.hashes".sha1; + module "uuid" +local last_uniq_time = 0; +local function uniq_time() + local new_uniq_time = os_time(); + if last_uniq_time >= new_uniq_time then new_uniq_time = last_uniq_time + 1; end + last_uniq_time = new_uniq_time; + return new_uniq_time; +end + +local function new_random(x) + return sha1(x..os_clock()..tostring({}), true); +end + function generate() - return tostring(m_random(0, 99999999)); + return new_random(uniq_time()); end -return _M; \ No newline at end of file +return _M; -- cgit v1.2.3