Re: sleep wake without runloop


On Nov 23, 2017, at 1:45 AM, Gerriet M. Denkmann <g@...> wrote:

Is there a way to ascertain whether a process is sleeping or awake?

If a process is doing anything, it’s awake. Asking “is my process asleep?” is kind of like asking a person “are you asleep?” :)

There is IORegisterForSystemPower which sends seep/wake notifications but needs a runloop.

You can start a background thread and run a runloop on it.

The problem: between NSWorkspaceWillSleepNotification and NSWorkspaceDidWakeNotification this (as any app) will be active from time to time (every few minutes it will be active for almost a minute), which messes up the internals of chronyd.

Are you talking about Power Nap mode, where the computer can wake up periodically when it’s asleep to fetch email, etc?


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