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util/throttle.lua @ 4388:eded80beab58
net.server_select: Never call onincoming with nil data when a listener doesn't have an onconnect handler
author | Matthew Wild <mwild1@gmail.com> |
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date | Tue, 27 Sep 2011 17:28:56 +0100 |
parent | 4362:851885cb332d |
child | 4466:28e0bf9cf0f5 |
rev | line source |
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4362
851885cb332d
util.throttle: Generic module by waqas to limit something over some time
Matthew Wild <mwild1@gmail.com>
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1 |
851885cb332d
util.throttle: Generic module by waqas to limit something over some time
Matthew Wild <mwild1@gmail.com>
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2 local gettime = require "socket".gettime; |
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util.throttle: Generic module by waqas to limit something over some time
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parents:
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3 |
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util.throttle: Generic module by waqas to limit something over some time
Matthew Wild <mwild1@gmail.com>
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4 module "throttle" |
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util.throttle: Generic module by waqas to limit something over some time
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5 |
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util.throttle: Generic module by waqas to limit something over some time
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6 local throttle = {}; |
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util.throttle: Generic module by waqas to limit something over some time
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7 local throttle_mt = { __index = throttle }; |
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util.throttle: Generic module by waqas to limit something over some time
Matthew Wild <mwild1@gmail.com>
parents:
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8 |
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util.throttle: Generic module by waqas to limit something over some time
Matthew Wild <mwild1@gmail.com>
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9 function throttle:update() |
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util.throttle: Generic module by waqas to limit something over some time
Matthew Wild <mwild1@gmail.com>
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10 local newt = gettime(); |
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util.throttle: Generic module by waqas to limit something over some time
Matthew Wild <mwild1@gmail.com>
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11 local elapsed = newt - self.t; |
851885cb332d
util.throttle: Generic module by waqas to limit something over some time
Matthew Wild <mwild1@gmail.com>
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12 self.t = newt; |
851885cb332d
util.throttle: Generic module by waqas to limit something over some time
Matthew Wild <mwild1@gmail.com>
parents:
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13 local balance = self.rate * elapsed + self.balance; |
851885cb332d
util.throttle: Generic module by waqas to limit something over some time
Matthew Wild <mwild1@gmail.com>
parents:
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14 if balance > self.max then |
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util.throttle: Generic module by waqas to limit something over some time
Matthew Wild <mwild1@gmail.com>
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15 self.balance = self.max; |
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util.throttle: Generic module by waqas to limit something over some time
Matthew Wild <mwild1@gmail.com>
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16 else |
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util.throttle: Generic module by waqas to limit something over some time
Matthew Wild <mwild1@gmail.com>
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17 self.balance = balance; |
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util.throttle: Generic module by waqas to limit something over some time
Matthew Wild <mwild1@gmail.com>
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18 end |
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util.throttle: Generic module by waqas to limit something over some time
Matthew Wild <mwild1@gmail.com>
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19 return self.balance; |
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util.throttle: Generic module by waqas to limit something over some time
Matthew Wild <mwild1@gmail.com>
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20 end |
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util.throttle: Generic module by waqas to limit something over some time
Matthew Wild <mwild1@gmail.com>
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21 |
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22 function throttle:peek(cost) |
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util.throttle: Generic module by waqas to limit something over some time
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23 cost = cost or 1; |
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util.throttle: Generic module by waqas to limit something over some time
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24 return self.balance >= cost or self:update() >= cost; |
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util.throttle: Generic module by waqas to limit something over some time
Matthew Wild <mwild1@gmail.com>
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25 end |
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util.throttle: Generic module by waqas to limit something over some time
Matthew Wild <mwild1@gmail.com>
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26 |
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27 function throttle:poll(cost, split) |
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util.throttle: Generic module by waqas to limit something over some time
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28 if self:peek(cost) then |
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29 self.balance = self.balance - cost; |
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30 return true; |
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Matthew Wild <mwild1@gmail.com>
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31 else |
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util.throttle: Generic module by waqas to limit something over some time
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32 local balance = self.balance; |
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util.throttle: Generic module by waqas to limit something over some time
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33 if split then |
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34 self.balance = 0; |
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util.throttle: Generic module by waqas to limit something over some time
Matthew Wild <mwild1@gmail.com>
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35 end |
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util.throttle: Generic module by waqas to limit something over some time
Matthew Wild <mwild1@gmail.com>
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36 return false, balance, (cost-self.balance); |
851885cb332d
util.throttle: Generic module by waqas to limit something over some time
Matthew Wild <mwild1@gmail.com>
parents:
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37 end |
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util.throttle: Generic module by waqas to limit something over some time
Matthew Wild <mwild1@gmail.com>
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38 end |
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util.throttle: Generic module by waqas to limit something over some time
Matthew Wild <mwild1@gmail.com>
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39 |
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util.throttle: Generic module by waqas to limit something over some time
Matthew Wild <mwild1@gmail.com>
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40 function create(max, period) |
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util.throttle: Generic module by waqas to limit something over some time
Matthew Wild <mwild1@gmail.com>
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41 return setmetatable({ rate = max / period, max = max, t = 0, balance = max }, throttle_mt); |
851885cb332d
util.throttle: Generic module by waqas to limit something over some time
Matthew Wild <mwild1@gmail.com>
parents:
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42 end |
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util.throttle: Generic module by waqas to limit something over some time
Matthew Wild <mwild1@gmail.com>
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43 |
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util.throttle: Generic module by waqas to limit something over some time
Matthew Wild <mwild1@gmail.com>
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44 return _M; |