• Open Menu Close Menu
  • Apple
  • Shopping Bag
  • Apple
  • Mac
  • iPad
  • iPhone
  • Watch
  • TV
  • Music
  • Support
  • Search apple.com
  • Shopping Bag

Lists

Open Menu Close Menu
  • Terms and Conditions
  • Lists hosted on this site
  • Email the Postmaster
  • Tips for posting to public mailing lists
Re:Re: How to know the existance of the instance of IOUserClient
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re:Re: How to know the existance of the instance of IOUserClient

  • Subject: Re:Re: How to know the existance of the instance of IOUserClient
  • From: searockcliff <email@hidden>
  • Date: Tue, 29 Sep 2009 08:42:20 +0800 (CST)
Hi Mike,
 
You help me a lot! It works!
Thank!


在2009-09-28，"Michael Smith" <email@hidden> 写道：

On Sep 27, 2009, at 2:46 AM, searockcliff wrote:

I have a driver which uses IOUserClient.
When the drriver is being used by the client application, kextunload will fail and reports that there are client instances.
 
How could I know the existance of the instace of IOUserClient in driver, so I can refuse to unload in terminate() function? As kextunload knows that.

::terminate will normally fail if the driver is open.  Your userclient should call ::open/::close on your driver to indicate that it's in use.

If you need to support more than one userclient at the same time, you will need to implement ::handleOpen/::handleIsOpen in the driver.

 = Mike

--
True terror is to wake up one morning and discover that your high school class is running the country. -- Kurt Vonnegut









"中国制造",讲述中国60年往事 
 _______________________________________________
Do not post admin requests to the list. They will be ignored.
Darwin-kernel mailing list      (email@hidden)
Help/Unsubscribe/Update your Subscription:

This email sent to email@hidden
References: 
 >Re: How to know the existance of the instance of IOUserClient (From: Michael Smith <email@hidden>)
 >How to know the existance of the instance of IOUserClient (From: searockcliff <email@hidden>)

  • Prev by Date: VFS plug-in for single file io filtering.
  • Next by Date: Problem Calling namei
  • Previous by thread: Re: How to know the existance of the instance of IOUserClient
  • Next by thread: VFS plug-in for single file io filtering.
  • Index(es):
    • Date
    • Thread