A signal manager keeps track of a set of signals to be managed and the signal handlers for them. When a signal manager is managing a signal, it installs its own OCaml handler for that signal that records delivery of the signal. It then later, upon request, will deliver the signal to all its handlers.
Once a signal manager starts managing a signal, it never stops.
include sig ... endval sexp_of_t : t ‑> Base.Sexp.tval create : thread_safe_notify_signal_delivered:(unit ‑> unit) ‑> tcreate creates and returns a signal manager t. Whenever a signal that t is
managing is delivered, it will call thread_safe_notify_signal_delivered from within
the OCaml signal handler. Therefore thread_safe_notify_signal_delivered must be
thread safe.
val manage : t ‑> Core.Signal.t ‑> unitmanage t signal causes t to manage signal, thus overriding
default_sys_behavior for that signal, and any other OCaml handler for that
signal.
val is_managing : t ‑> Core.Signal.t ‑> boolis_managing t signal returns true iff manage t signal has been called
type handlerinstall_handler t signals f causes t to manage the handling of signals, and
registers f to run on every signal in signals that is delivered. It is an
error if f ever raises when it is called.
val install_handler : t ‑> Core.Signal.t list ‑> (Core.Signal.t ‑> unit) ‑> handlerremove_handler handler causes the particular handler to no longer handle the
signals it was registered to handle. The signal manager continues to manage those
signals, i.e. the OCaml signal handler remains installed, whether or not they still
have handlers.
val handle_delivered : t ‑> unithandle_delivered t runs all signal handlers on the signals that have been
delivered but not yet handled.