power_daemon: Refactor to handle multiple exported power devices.

- Each PowerMonitor now exports a set of descriptors rather than
only a single one. This allows e.g. PowerButtonMonitor to watch
multiple possible button event sources rather than one.

This gets power button working again on some hardware that exports
multiple ACPI power buttons, but offers no obvious way to determine
which one is actually active/being used. In the long term though, it'd
be nice to have a well-defined kernel power event interface that an app
could subscribe to, rather than having to watch individual devfs
descriptors.

Thanks to tqh and korli for advice/review.

power_daemon: use wait_for_objects() instead of polling.

* acpi_button and acpi_lid support select/deselect hooks.
* power_daemon now uses a thread waiting for lid or power button events.
* a power button event is still hardcoded to a shutdown.
* a lid event only displays a message.

power_daemon: code cleanup, added copyright header.

Use the new private roster API to shutdown.
Maybe we should have a confirmation alert the first time ?
Btw, the power_button driver should really implement select() or some other non-polling mechanism, it sux having to waste cpu.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42934 a95241bf-73f2-0310-859d-f6bbb57e9c96

Added the beginnings of our power management daemon. Currently does nothing except tell the roster to shut down when you press the power button (in conjuction with acpi_button, of course). Eventually will do things like display low power warnings, spin down hard disks, and display the requisite power info deskbar replicant.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@11466 a95241bf-73f2-0310-859d-f6bbb57e9c96

power_daemon: Refactor to handle multiple exported power devices.

- Each PowerMonitor now exports a set of descriptors rather than
only a single one. This allows e.g. PowerButtonMonitor to watch
multiple possible button event sources rather than one.

This gets power button working again on some hardware that exports
multiple ACPI power buttons, but offers no obvious way to determine
which one is actually active/being used. In the long term though, it'd
be nice to have a well-defined kernel power event interface that an app
could subscribe to, rather than having to watch individual devfs
descriptors.

Thanks to tqh and korli for advice/review.

power_daemon: use wait_for_objects() instead of polling.

* acpi_button and acpi_lid support select/deselect hooks.
* power_daemon now uses a thread waiting for lid or power button events.
* a power button event is still hardcoded to a shutdown.
* a lid event only displays a message.

power_daemon: code cleanup, added copyright header.

Use the new private roster API to shutdown.
Maybe we should have a confirmation alert the first time ?
Btw, the power_button driver should really implement select() or some other non-polling mechanism, it sux having to waste cpu.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42934 a95241bf-73f2-0310-859d-f6bbb57e9c96

Added the beginnings of our power management daemon. Currently does nothing except tell the roster to shut down when you press the power button (in conjuction with acpi_button, of course). Eventually will do things like display low power warnings, spin down hard disks, and display the requisite power info deskbar replicant.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@11466 a95241bf-73f2-0310-859d-f6bbb57e9c96