Software /
code /
prosody
File
util/queue.lua @ 13627:2db7b3b65363
core.configmanager: Add function for getting secrets from separate files
Idea is to enable easily retrieving of secret values from files outside
of the config, e.g. via the method used by systemd credentials.
CREDENTIALS_DIRECTORY is expected to be set by the process manager
invoking Prosody, so being unset and unavailable from prosodyctl is
going to be normal and a warning is reported in that case. Care will
have to be taken to make it clear that prosodyctl check will not work
with such values. An error is thrown if the directory is unavailable
when running under Prosody.
author | Kim Alvefur <zash@zash.se> |
---|---|
date | Thu, 16 Jan 2025 15:21:34 +0100 (3 months ago) |
parent | 12975:d10957394a3c |
line wrap: on
line source
-- Prosody IM -- Copyright (C) 2008-2015 Matthew Wild -- Copyright (C) 2008-2015 Waqas Hussain -- -- This project is MIT/X11 licensed. Please see the -- COPYING file in the source package for more information. -- -- Small ringbuffer library (i.e. an efficient FIFO queue with a size limit) -- (because unbounded dynamically-growing queues are a bad thing...) local have_utable, utable = pcall(require, "prosody.util.table"); -- For pre-allocation of table local function new(size, allow_wrapping) -- Head is next insert, tail is next read local head, tail = 1, 1; local items = 0; -- Number of stored items local t = have_utable and utable.create(size, 0) or {}; -- Table to hold items --luacheck: ignore 212/self return { _items = t; size = size; count = function (self) return items; end; push = function (self, item) if items >= size then if allow_wrapping then tail = (tail%size)+1; -- Advance to next oldest item items = items - 1; else return nil, "queue full"; end end t[head] = item; items = items + 1; head = (head%size)+1; return true; end; pop = function (self) if items == 0 then return nil; end local item; item, t[tail] = t[tail], 0; tail = (tail%size)+1; items = items - 1; return item; end; peek = function (self) if items == 0 then return nil; end return t[tail]; end; replace = function (self, data) if items == 0 then return self:push(data); end t[tail] = data; return true; end; items = function (self) return function (_, pos) if pos >= items then return nil; end local read_pos = tail + pos; if read_pos > self.size then read_pos = (read_pos%size); end return pos+1, t[read_pos]; end, self, 0; end; consume = function (self) return self.pop, self; end; }; end return { new = new; };