Mach messages: host_notify_reply

Message catalog and dispatch · All subsystem ranges · Kernel entry map

osfmk/mach/host_notify_reply.defs. Service/callback interface outside the ordinary kernel kobject table. Follow local sender/receiver evidence; external service bodies are not supplied by the declaration. Registration evidence: mig_e.

Reading these entries

IDs are computed from the explicit preprocessing profiles in the catalog guide, counting both routines and skip slots. They are not discovered from a running kernel. Each entry retains all observed names/declaration locations; the displayed fields come from the first non-skipped profile. Alternative declarations can have different fields. simpleroutine is one-way at the MIG interface level.

An interface contract block quotes the adjacent local .defs comment with whitespace normalized. Mechanism paragraphs explain selected implementation decisions. Local body links and call names identify implementation evidence; syntactic call lists are reading aids, not a proof that every listed call executes on every path. Short complete implementation bodies are included where especially useful.

Complete routine and reserved-slot catalog

950: host_calendar_changed

Notify a registered receiver that calendar time changed.

Mechanism: The local host-notify helper constructs the generated request type for HOST_NOTIFY_CALENDAR_CHANGE, detaches eligible live registrations under the notify/port locks, then sends after releasing the list lock. It fills msgh_id from the reply-ID table and moves each registered send-once right. Delivery consumes the registration; calendar subscribers must register again as required. Local path.

Declarations: host_calendar_changed (server64, server32, client64, client32, libsyscall64, sender64, local64).

Fields after preprocessing (server64):

simpleroutine host_calendar_changed(
  notify_port : mach_port_move_send_once_t);

Implementation boundary: no same-symbol receiver body was resolved in the indexed local C/C++ implementation files.

951: host_calendar_set

Notify a registered receiver of a calendar-time set operation.

Mechanism: The local host-notify helper constructs the generated request type for HOST_NOTIFY_CALENDAR_SET, detaches eligible live registrations under the notify/port locks, then sends after releasing the list lock. It fills msgh_id from the reply-ID table and moves each registered send-once right. Delivery consumes the registration; calendar subscribers must register again as required. Local path.

Declarations: host_calendar_set (server64, server32, client64, client32, libsyscall64, sender64, local64).