prosody
781772c8b6d9
util/smqueue.lua

Find changesets by keywords by author, files, the commit message, revision number or hash, or revset expression.

Software / code / prosody

Annotate

util/smqueue.lua @ 12630:781772c8b6d9

mod_mam: Store archives with sub-second precision timestamps Changes sub-second part of example timestamp to .5 in order to avoid floating point issues. Some clients use timestamps when ordering messages which can lead to messages having the same timestamp ending up in the wrong order. It would be better to preserve the order messages are sent in, which is the order they were stored in.
author Kim Alvefur <zash@zash.se>
date Sun, 14 Aug 2022 17:28:31 +0200
parent 12058:4860da718e87
child 12975:d10957394a3c
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
12055
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
Kim Alvefur <zash@zash.se>
parents:
diff changeset
1 local queue = require("util.queue");
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
Kim Alvefur <zash@zash.se>
parents:
diff changeset
2
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
Kim Alvefur <zash@zash.se>
parents:
diff changeset
3 local lib = { smqueue = {} }
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
Kim Alvefur <zash@zash.se>
parents:
diff changeset
4
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
Kim Alvefur <zash@zash.se>
parents:
diff changeset
5 local smqueue = lib.smqueue;
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
Kim Alvefur <zash@zash.se>
parents:
diff changeset
6
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
Kim Alvefur <zash@zash.se>
parents:
diff changeset
7 function smqueue:push(v)
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
Kim Alvefur <zash@zash.se>
parents:
diff changeset
8 self._head = self._head + 1;
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
Kim Alvefur <zash@zash.se>
parents:
diff changeset
9
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
Kim Alvefur <zash@zash.se>
parents:
diff changeset
10 assert(self._queue:push(v));
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
Kim Alvefur <zash@zash.se>
parents:
diff changeset
11 end
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
Kim Alvefur <zash@zash.se>
parents:
diff changeset
12
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
Kim Alvefur <zash@zash.se>
parents:
diff changeset
13 function smqueue:ack(h)
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
Kim Alvefur <zash@zash.se>
parents:
diff changeset
14 if h < self._tail then
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
Kim Alvefur <zash@zash.se>
parents:
diff changeset
15 return nil, "tail"
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
Kim Alvefur <zash@zash.se>
parents:
diff changeset
16 elseif h > self._head then
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
Kim Alvefur <zash@zash.se>
parents:
diff changeset
17 return nil, "head"
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
Kim Alvefur <zash@zash.se>
parents:
diff changeset
18 end
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
Kim Alvefur <zash@zash.se>
parents:
diff changeset
19
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
Kim Alvefur <zash@zash.se>
parents:
diff changeset
20 local acked = {};
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
Kim Alvefur <zash@zash.se>
parents:
diff changeset
21 self._tail = h;
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
Kim Alvefur <zash@zash.se>
parents:
diff changeset
22 local expect = self._head - self._tail;
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
Kim Alvefur <zash@zash.se>
parents:
diff changeset
23 while expect < self._queue:count() do
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
Kim Alvefur <zash@zash.se>
parents:
diff changeset
24 local v = self._queue:pop();
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
Kim Alvefur <zash@zash.se>
parents:
diff changeset
25 if not v then return nil, "pop" end
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
Kim Alvefur <zash@zash.se>
parents:
diff changeset
26 table.insert(acked, v);
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
Kim Alvefur <zash@zash.se>
parents:
diff changeset
27 end
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
Kim Alvefur <zash@zash.se>
parents:
diff changeset
28 return acked
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
Kim Alvefur <zash@zash.se>
parents:
diff changeset
29 end
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
Kim Alvefur <zash@zash.se>
parents:
diff changeset
30
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
Kim Alvefur <zash@zash.se>
parents:
diff changeset
31 function smqueue:count_unacked() return self._head - self._tail end
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
Kim Alvefur <zash@zash.se>
parents:
diff changeset
32
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
Kim Alvefur <zash@zash.se>
parents:
diff changeset
33 function smqueue:count_acked() return self._tail end
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
Kim Alvefur <zash@zash.se>
parents:
diff changeset
34
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
Kim Alvefur <zash@zash.se>
parents:
diff changeset
35 function smqueue:resumable() return self._queue:count() >= (self._head - self._tail) end
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
Kim Alvefur <zash@zash.se>
parents:
diff changeset
36
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
Kim Alvefur <zash@zash.se>
parents:
diff changeset
37 function smqueue:resume() return self._queue:items() end
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
Kim Alvefur <zash@zash.se>
parents:
diff changeset
38
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
Kim Alvefur <zash@zash.se>
parents:
diff changeset
39 function smqueue:consume() return self._queue:consume() end
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
Kim Alvefur <zash@zash.se>
parents:
diff changeset
40
12058
4860da718e87 util.smqueue: Simplify compat table, fix dependent modules (thanks Martin)
Kim Alvefur <zash@zash.se>
parents: 12055
diff changeset
41 function smqueue:table()
4860da718e87 util.smqueue: Simplify compat table, fix dependent modules (thanks Martin)
Kim Alvefur <zash@zash.se>
parents: 12055
diff changeset
42 local t = {};
4860da718e87 util.smqueue: Simplify compat table, fix dependent modules (thanks Martin)
Kim Alvefur <zash@zash.se>
parents: 12055
diff changeset
43 for i, v in self:resume() do t[i] = v; end
4860da718e87 util.smqueue: Simplify compat table, fix dependent modules (thanks Martin)
Kim Alvefur <zash@zash.se>
parents: 12055
diff changeset
44 return t
12055
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
Kim Alvefur <zash@zash.se>
parents:
diff changeset
45 end
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
Kim Alvefur <zash@zash.se>
parents:
diff changeset
46
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
Kim Alvefur <zash@zash.se>
parents:
diff changeset
47 local function freeze(q) return { head = q._head; tail = q._tail } end
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
Kim Alvefur <zash@zash.se>
parents:
diff changeset
48
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
Kim Alvefur <zash@zash.se>
parents:
diff changeset
49 local queue_mt = { __name = "smqueue"; __index = smqueue; __len = smqueue.count_unacked; __freeze = freeze }
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
Kim Alvefur <zash@zash.se>
parents:
diff changeset
50
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
Kim Alvefur <zash@zash.se>
parents:
diff changeset
51 function lib.new(size)
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
Kim Alvefur <zash@zash.se>
parents:
diff changeset
52 assert(size > 0);
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
Kim Alvefur <zash@zash.se>
parents:
diff changeset
53 return setmetatable({ _head = 0; _tail = 0; _queue = queue.new(size, true) }, queue_mt)
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
Kim Alvefur <zash@zash.se>
parents:
diff changeset
54 end
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
Kim Alvefur <zash@zash.se>
parents:
diff changeset
55
daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
Kim Alvefur <zash@zash.se>
parents:
diff changeset
56 return lib