trying to port web app starter from PHP

site/doc/pages/task_repeat.txt

@@ -0,0 +1,17 @@
+:sig
+pid_t task_repeat(String key, f64 interval, std::function<void()> exec_func, u64 timeout = 60*10)
+
+:params
+key : string uniquely identifying the task
+interval : repeat interval in seconds
+exec_func : function to execute repeatedly
+timeout : optional task timeout value
+return value : the process ID of the started (or still running) task
+
+:desc
+Starts a repeating background worker process. The function `exec_func` is executed in a loop and the worker sleeps for `interval` seconds between executions.
+
+If a process with the same `key` is already running, `task_repeat()` does not start a second worker and instead returns the PID of the existing one.
+
+:see
+>task