Alarm

An alarm is just a port which the kernel will send a message to at the specified time.

Normally, the kernel will be the only task sending a message to an alarm. However, the mechanism it uses to do so is exposed in user space. To simulate an alarm reply from the kernel, use the reply(returning:time:type:) function.

Allocating Alarm Ports

• static func allocate(name: mach_port_name_t?, onClock: Mach.Clock, after: Mach.Clock.Duration) throws -> Self

  Sets an alarm to ring after a given duration.

• static func allocate(name: mach_port_name_t?, onClock: Mach.Clock, at: Mach.Clock.Instant) throws -> Self

  Sets an alarm to ring at a given time.

• struct TimeType

  A type of time value.

• static func allocate(name: mach_port_name_t?, onClock: Mach.Clock, time: mach_timespec_t, type: Mach.TimeType) throws -> Self

  Sets up an alarm on a given clock.

Simulating a Reply

• func reply(returning: MachError.Code, time: mach_timespec_t, type: Mach.TimeType) throws

  Sends a reply to the alarm.