Mercurial > prosody-hg

annotate util/smqueue.lua @ 12433:3dfcdcab5446 0.12

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MUC: Allow kicking users with the same affiliation as the kicker (fixes #1724) This is allowed by XEP-0045, which states: "A moderator SHOULD NOT be allowed to revoke moderation privileges from someone with a higher affiliation than themselves (i.e., an unaffiliated moderator SHOULD NOT be allowed to revoke moderation privileges from an admin or an owner, and an admin SHOULD NOT be allowed to revoke moderation privileges from an owner)."
author Matthew Wild <mwild1@gmail.com>
date Wed, 23 Mar 2022 13:38:55 +0000
parents 4860da718e87
children d10957394a3c
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
Kim Alvefur <zash@zash.se>
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1 local queue = require("util.queue");
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
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2
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
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3 local lib = { smqueue = {} }
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5 local smqueue = lib.smqueue;
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7 function smqueue:push(v)
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8 self._head = self._head + 1;
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9
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10 assert(self._queue:push(v));
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11 end
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13 function smqueue:ack(h)
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14 if h < self._tail then
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15 return nil, "tail"
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16 elseif h > self._head then
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17 return nil, "head"
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18 end
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19
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20 local acked = {};
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21 self._tail = h;
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22 local expect = self._head - self._tail;
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23 while expect < self._queue:count() do
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
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24 local v = self._queue:pop();
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25 if not v then return nil, "pop" end
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26 table.insert(acked, v);
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27 end
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28 return acked
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29 end
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30
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31 function smqueue:count_unacked() return self._head - self._tail end
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32
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33 function smqueue:count_acked() return self._tail end
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34
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35 function smqueue:resumable() return self._queue:count() >= (self._head - self._tail) end
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36
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37 function smqueue:resume() return self._queue:items() end
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38
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39 function smqueue:consume() return self._queue:consume() end
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40
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4860da718e87 util.smqueue: Simplify compat table, fix dependent modules (thanks Martin)
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41 function smqueue:table()
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42 local t = {};
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43 for i, v in self:resume() do t[i] = v; end
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44 return t
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45 end
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46
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47 local function freeze(q) return { head = q._head; tail = q._tail } end
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48
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49 local queue_mt = { __name = "smqueue"; __index = smqueue; __len = smqueue.count_unacked; __freeze = freeze }
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50
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51 function lib.new(size)
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52 assert(size > 0);
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53 return setmetatable({ _head = 0; _tail = 0; _queue = queue.new(size, true) }, queue_mt)
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54 end
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55
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56 return lib