Re: [android-developers] What is a "binder thread"?

Hi

On Wednesday, September 29, 2010 11:32:57 PM UTC+2, Dianne Hackborn wrote:

Specifically, each process has a pool of "binder threads" which sit there waiting for incoming IPCs from other process.  When an IPC is dispatched to your process, one of these threads comes out of the pool to process it.  These may come to you directly through an IBinder you publish from a Service to another process, semi-directly through calls from another process to a ContentProvider you have published, or indirectly from a wide range of IPCs the system does into app processes to tell it to launch an activity, receive an intent, etc.

I have been trying to get a better understanding of how this works. Will every thread have it's own iocl/binder with the kernel or will there still be a main binder thread dispatching call to the processing threads?

Thanks
 

On Wed, Sep 29, 2010 at 9:42 AM, Mark Murphy <mmu...@commonsware.com> wrote:

If I understand correctly, for IPC via AIDL, the object that is
responding to the IPC is invoked on a binder thread. The object
definitely is not invoked on the main application thread.

They may have additional uses, but that's the one I can think off of
the top o' my head.

On Wed, Sep 29, 2010 at 12:37 PM, DanH <danh...@ieee.org> wrote:
> I tried Google, but the only answer I could find is "They were created
> by the system and they don't do any harm."  I'm not worried about them
> per se, but was just curious about what they actually do and why
> they're there.

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Mark Murphy (a Commons Guy)
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Android 2.2 Programming Books: http://commonsware.com/books

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Dianne Hackborn
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Note: please don't send private questions to me, as I don't have time to provide private support, and so won't reply to such e-mails.  All such questions should be posted on public forums, where I and others can see and answer them.

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