Re: [PATCH 1/8] PM: Opportunistic suspend support.

[Linus Walleij]

2010/5/26 Peter Zijlstra <peterz@xxxxxxxxxxxxx>:
> On Wed, 2010-05-26 at 03:17 -0700, Arve Hjønnevåg wrote:
>> > With a single suspend manager process that manages the suspend state you
>> > can achieve the same goal.
>> >
>>
>> Yes we don't need the /dev interface, but it is useful. Without it any
>> program that needs to block suspend has to make a blocking ipc call
>> into the suspend manager process. Android already does this for java
>> code, but system processes written in C block suspend directly with
>> the kernel since they cannot use the java APIs.
>
> So provide a C interface to it as well?
>
> Surely you can have the java thing have a unix socket or something a C
> app can talk to. That shouldn't be hard at all.
>
> Or make the suspend manager a C proglet and provide a JNI interface, or
> whatever.

Android already has D-Bus:
http://android.git.kernel.org/?p=platform/external/dbus.git;a=summary

Which has Java bindings:
http://dbus.freedesktop.org/doc/dbus-java/

D-Bus can be from C to send messages to the Java daemon.
So why not use that if this seems to be a problem. It even brings
serialized typing and all that funny stuff.

Yours,
Linus Walleij
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