site_archiver@lists.apple.com Delivered-To: darwin-kernel@lists.apple.com -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 In a previous version, I used the async methods (setAsyncResult and sendAsyncReference). I didn't like the client side because it required too much integration with the app (e.g. RunLoops). I assume for compatibility, I would use the newer "64" versions. Do those work for both 32 and 64-bit applications? I'm not sure which notifications you are referring too. On Jun 23, 2009, at 5:18 PM, Alexei Kosut wrote:
Duane,
What are you using the notification semaphore for? Perhaps you can find a replacement with one of the supported IOKit user client functions, e.g., asynchronous methods or notifications.
Alexei
On Jun 23, 2009, at 2:22 PM, Duane Murphy wrote:
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(moving to darwin-kernel in the hopes that someone here might be able to help.)
I now know how this works, but it is unclear why this is not being supported for 64-bit kernels. It would be nice if someone at Apple could comment, otherwise, it's going to cost me a DTS incident and a lot of work. :-(
io_connect_get_notification_semaphore() is mig generated. The semaphore_t type has special mig handlers for incoming translation, outgoing translation and destruction. The opaque semaphore_t structure contains the mach port. The data sent to user space is the mach port with send rights.
As this requires access to the opaque parts of the semaphore_t structure, it is not a supported interface.
It sure would be nice if this was supported or something like it.
...Duane
On Jun 23, 2009, at 11:13 AM, Duane Murphy wrote:
* PGP Signed: 06/23/09 at 11:13:32
I've done some more work on this and could use some recommendations on how to make this work.
My first attempt was to simply pass the semaphore_t from the kernel back to the app. That didn't work at all.
I went back to the 32-bit app and the old code and noticed that the semaphore_t in user space does not appear to be the semaphore_t from the kernel. There must be some massaging going on somewhere.
What kind of massaging is happening so that I can get this to work.
Thanks for the help,
On Jun 19, 2009, at 12:27 PM, Duane Murphy wrote:
Old Signed: 06/19/09 at 12:27:20
Is there a replacement or recommendation for a replacement for io_connect_get_notification_semaphore() for 64-bit clients to an IOUserClient?
We were using io_connect_get_notification_semaphore() in our 32-bit client side interface to our kext. It makes sense that this doesn't work in LP64 (semphore* would be a problem).
Is there a recommended method for doing this ourselves? Is there a new and exciting interface wired to IOUserClient::getNotificationSemaphore()?
...Duane
* Duane Murphy <duanemurphy@mac.com> * 0x10E2BD82(L)
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...Duane
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