net.unbound: Show canonical name in textual format (e.g. in shell)
libunbound does not tell us the whole chain of CNAMEs, only the final
canonical name.
This is to aid in debugging since it will only be shown in the shell.
local queue = require("prosody.util.queue");
local lib = { smqueue = {} }
local smqueue = lib.smqueue;
function smqueue:push(v)
self._head = self._head + 1;
assert(self._queue:push(v));
end
function smqueue:ack(h)
if h < self._tail then
return nil, "tail"
elseif h > self._head then
return nil, "head"
end
local acked = {};
self._tail = h;
local expect = self._head - self._tail;
while expect < self._queue:count() do
local v = self._queue:pop();
if not v then return nil, "pop" end
table.insert(acked, v);
end
return acked
end
function smqueue:count_unacked() return self._head - self._tail end
function smqueue:count_acked() return self._tail end
function smqueue:resumable() return self._queue:count() >= (self._head - self._tail) end
function smqueue:resume() return self._queue:items() end
function smqueue:consume() return self._queue:consume() end
function smqueue:table()
local t = {};
for i, v in self:resume() do t[i] = v; end
return t
end
local function freeze(q) return { head = q._head; tail = q._tail } end
local queue_mt = { __name = "smqueue"; __index = smqueue; __len = smqueue.count_unacked; __freeze = freeze }
function lib.new(size)
assert(size > 0);
return setmetatable({ _head = 0; _tail = 0; _queue = queue.new(size, true) }, queue_mt)
end
return lib