feat(apisix): add Cloudron package

- Implements Apache APISIX packaging for Cloudron platform.
- Includes Dockerfile, CloudronManifest.json, and start.sh.
- Configured to use Cloudron's etcd addon.

🤖 Generated with Gemini CLI
Co-Authored-By: Gemini <noreply@google.com>

CloudronPackages/APISIX/apisix-source/apisix/timers.lua

@@ -0,0 +1,103 @@
+--
+-- Licensed to the Apache Software Foundation (ASF) under one or more
+-- contributor license agreements.  See the NOTICE file distributed with
+-- this work for additional information regarding copyright ownership.
+-- The ASF licenses this file to You under the Apache License, Version 2.0
+-- (the "License"); you may not use this file except in compliance with
+-- the License.  You may obtain a copy of the License at
+--
+--     http://www.apache.org/licenses/LICENSE-2.0
+--
+-- Unless required by applicable law or agreed to in writing, software
+-- distributed under the License is distributed on an "AS IS" BASIS,
+-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+-- See the License for the specific language governing permissions and
+-- limitations under the License.
+--
+local core = require("apisix.core")
+local process = require("ngx.process")
+local pairs = pairs
+local unpack = unpack
+local thread_spawn = ngx.thread.spawn
+local thread_wait = ngx.thread.wait
+
+local check_interval = 1
+
+local timers = {}
+
+
+local _M = {}
+
+
+local function background_timer()
+    if core.table.nkeys(timers) == 0 then
+        return
+    end
+
+    local threads = {}
+    for name, timer in pairs(timers) do
+        core.log.info("run timer[", name, "]")
+
+        local th, err = thread_spawn(timer)
+        if not th then
+            core.log.error("failed to spawn thread for timer [", name, "]: ", err)
+            goto continue
+        end
+
+        core.table.insert(threads, th)
+
+::continue::
+    end
+
+    local ok = thread_wait(unpack(threads))
+    if not ok then
+        core.log.error("failed to wait threads")
+    end
+end
+
+
+local function is_privileged()
+    return process.type() == "privileged agent"
+end
+
+
+function _M.init_worker()
+    local opts = {
+        each_ttl = 0,
+        sleep_succ = 0,
+        check_interval = check_interval,
+    }
+    local timer, err = core.timer.new("background", background_timer, opts)
+    if not timer then
+        core.log.error("failed to create background timer: ", err)
+        return
+    end
+
+    core.log.notice("succeed to create background timer")
+end
+
+
+function _M.register_timer(name, f, privileged)
+    if privileged and not is_privileged() then
+        return
+    end
+
+    timers[name] = f
+end
+
+
+function _M.unregister_timer(name, privileged)
+    if privileged and not is_privileged() then
+        return
+    end
+
+    timers[name] = nil
+end
+
+
+function _M.check_interval()
+    return check_interval
+end
+
+
+return _M