April 2010 - Darwin-dev - lists.apple.com

Re: How to use cpuid?
by Duane Murphy 23 Apr '10

23 Apr '10

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 While I usually agree with that, the do_cpuid and cpuid functions are in-line and don't require linking. That's why I asked. These functions should be legit from either userland or from the kernel. On Apr 23, 2010, at 9:45 AM, Brian Bergstrand wrote: > You don't. The symbols in the Kernel framework are only exported by > the Kernel. They are not exported by any userland libraries. There > are of course symbol names shared by kernel and userland, but that > is by name only. > > On Apr 23, 2010, at 7:36 PM, Duane Murphy wrote: > >> -----BEGIN PGP SIGNED MESSAGE----- >> Hash: SHA256 >> >> I'd like to use the do_cpuid() function in i386/cpuid.h of the Kernel >> framework in a user land application as well as in a kext. >> >> The kext I can get compiling, but getting the userland include file >> working isn't playing nice. I added the Kernel framework to the Xcode >> project, but that doesn't really help because the internal header >> files don't use the Kernel prefix. >> >> How do I go about using do_cpuid() from a user land application? >> >> Thanks, >> >> ...Duane >> > > > ...Duane -----BEGIN PGP SIGNATURE----- Version: PGP Desktop 9.10.0 (Build 500) Charset: US-ASCII wsBVAwUBS9HVaUrg9acQ4r2CAQiHLAgAvh4lk0iraccHUmhIzeVfn1tCZoNPu4t8 OHNzNK6qWZHqkFA/i4QVhRZVA3vAke3A9VtI1E6CamwLobp+B3KDmcACGQGI8rZf ehoSpg81NkPRbRT5WsVcGR1HVOiHFctaTKCphXPqObfPD1Y09Jbyqvowv+0WBxkN zvchIUxFjoQPTUBl4/ZUOkv46Byys8J/Aea9x0Z/R/iJL0kvQ507HO2HkuJRd9nw rv16FpgrxZ6mcROses/fiYH0QGa/c8rTYBQQvia5DfmfQq/zwcMdvPv9yUfZRVky PT0Qol+wgdoFcVbXvBvwwWrqqTQj5IBWPqw2ed57QshAz2ZKDxTwSg== =C5TJ -----END PGP SIGNATURE----- _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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Re: How to use cpuid?
by Brian Bergstrand 23 Apr '10

23 Apr '10

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com You don't. The symbols in the Kernel framework are only exported by the Kernel. They are not exported by any userland libraries. There are of course symbol names shared by kernel and userland, but that is by name only. On Apr 23, 2010, at 7:36 PM, Duane Murphy wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA256 > > I'd like to use the do_cpuid() function in i386/cpuid.h of the Kernel > framework in a user land application as well as in a kext. > > The kext I can get compiling, but getting the userland include file > working isn't playing nice. I added the Kernel framework to the Xcode > project, but that doesn't really help because the internal header > files don't use the Kernel prefix. > > How do I go about using do_cpuid() from a user land application? > > Thanks, > > ...Duane > _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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How to use cpuid?
by Duane Murphy 23 Apr '10

23 Apr '10

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 I'd like to use the do_cpuid() function in i386/cpuid.h of the Kernel framework in a user land application as well as in a kext. The kext I can get compiling, but getting the userland include file working isn't playing nice. I added the Kernel framework to the Xcode project, but that doesn't really help because the internal header files don't use the Kernel prefix. How do I go about using do_cpuid() from a user land application? Thanks, ...Duane -----BEGIN PGP SIGNATURE----- Version: PGP Desktop 9.10.0 (Build 500) Charset: US-ASCII wsBVAwUBS9HMiErg9acQ4r2CAQg4mgf+O4/kdiUOLKMUg6jxT1bHI5pSa6D/bcKK PdbIzKLsg7HpwXC19IpcdR/LFON/4jqqGU1sx0P6XywYbNBlCTISaU3D7H/qzemd b4rlP40jbu8M8p7eUi9Rqy8CDHjy2kRQR/YZ7alqb0jYEc3CrRN+667pr1jpCWG/ PKZGYiKL+RYKyraOxGlVUJGPmps17XskfnL63C8TOJlHze06CRgrxbs7Fnqj+INZ xfNdfY0to4UQBR/yKcxQ6F5onJ70bZZ+xRcv+yh4X6DQbQkUwtcohPhL8qlAE2zp 0bTd3XSzomn/38PjLyGn/U61mY9Si5Y7sG8W9zfUTP8gbvEBfk2Mkg== =npmt -----END PGP SIGNATURE----- _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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Re: __ prefix in system call
by Jean-Daniel Dupas 22 Apr '10

22 Apr '10

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Le 22 avr. 2010 à 23:16, Ariel Feinerman a écrit : > Hi, > > I look at libc`s posix_spawn() function, one calls __posix_spawn() internally, I think __posix_spawn() is system call, but I learn xnu source by grep carefully, threre is only one function: posix_spawn(). What is __ ? nm libSystem.dylib 0000000000048020 t ___posix_spawn Answer: a libSystem internal symbol (aka implementation detail). What are you trying to do ? -- Jean-Daniel _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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__ prefix in system call
by Ariel Feinerman 22 Apr '10

22 Apr '10

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Re: using grand central dispatch with c++ for inter-thread communication
by Daniel Markarian 22 Apr '10

22 Apr '10

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Hey James, We expect to make IONotificationPortSetDispatchQueue() public in the next major release. You can use it safely. Dan Le 2010-04-21 à 16:13, James Peach a écrit : > On 21 April 2010 12:57, Daniel A. Steffen <dsteffen(a)apple.com> wrote: > >> Hi Joel, >> >> On Apr 21, 2010, at 12:05 PM, Joel Reymont wrote: >> >>> I looked at using dispatch queues at first but got stuck. This may be just the opportunity to get me over the stumbling block! This is the crucial bit of code that I can't figure out how to translate to dispatch queues: >>> >>> static IONotificationPortRef __NotifyPort; >>> >>> // add notification port and run loop source for async notifications >>> >>> __NotifyPort = IONotificationPortCreate(masterPort); >>> runLoopSource = IONotificationPortGetRunLoopSource(__NotifyPort); >>> __MeasatRunLoop = CFRunLoopGetCurrent(), >>> CFRunLoopAddSource(__MeasatRunLoop, runLoopSource, kCFRunLoopDefaultMode); >> >> instead of these three lines instead, all that should be needed is >> >> IONotificationPortSetDispatchQueue(__NotifyPort, some_queue) > > That's not a public API, see > > <http://www.opensource.apple.com/source/IOKitUser/IOKitUser-514.8.1/IOKitLib…> > > -- > James Peach | jorgar(a)gmail.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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Re: using grand central dispatch with c++ for inter-thread communication
by James Peach 21 Apr '10

21 Apr '10

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:received:message-id:subject:from:to:cc:content-type :content-transfer-encoding; bh=9R95fgu/bWVLz7pvEBZR7YlhrGkWB8/29cs+Q/8pEJ0=; b=RcVZZqRk9kWfj8wD2mASLZwqoBn8xYsaFlgM3jg9JhigWmZZ/vBBT8VVZvDIiuYXvn YCMuALpDurIkvBckD7ov/gm0Cu+o7mBz5Qp67D4aqmM0pkVgQizyqBrrTPqCCokyke52 e5yaUKPu62Uwjl8hsG51nonsfUurq7hiPBwiw= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; b=Bnri4uMF+UIMVjTfpTlx7NaYcaHVt+UUex34mdZHjiSAdDqTNI2/pCpNFm49jUvITF rr1XZkNx1gPSdYFKq96aX3YgLS2UkCBPB1zfIftKXTzAPlsKQCpqYhynop8UxtT+LE8z ySCWmmguyU8cREBSv3Rzx/pd1L3JQ4KBN3pTM= On 21 April 2010 12:57, Daniel A. Steffen <dsteffen(a)apple.com> wrote: > Hi Joel, > > On Apr 21, 2010, at 12:05 PM, Joel Reymont wrote: > >> I looked at using dispatch queues at first but got stuck. This may be just the opportunity to get me over the stumbling block! This is the crucial bit of code that I can't figure out how to translate to dispatch queues: >> >> static IONotificationPortRef __NotifyPort; >> >> // add notification port and run loop source for async notifications >> >> __NotifyPort = IONotificationPortCreate(masterPort); > > >> runLoopSource = IONotificationPortGetRunLoopSource(__NotifyPort); >> __MeasatRunLoop = CFRunLoopGetCurrent(), >> CFRunLoopAddSource(__MeasatRunLoop, runLoopSource, kCFRunLoopDefaultMode); > > > instead of these three lines instead, all that should be needed is > > IONotificationPortSetDispatchQueue(__NotifyPort, some_queue) That's not a public API, see <http://www.opensource.apple.com/source/IOKitUser/IOKitUser-514.8.1/IOKitLib…> -- James Peach | jorgar(a)gmail.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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Re: using grand central dispatch with c++ for inter-thread communication
by Kevin Van Vechten 21 Apr '10

21 Apr '10

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com And in general, if there's a framework that is providing an API that returns a CFRunLoopSourceRef or schedules an object with a run loop but does not have a dispatch source equivalent, please file an enhancement request at http://bugreporter.apple.com/ Kevin _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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Re: using grand central dispatch with c++ for inter-thread communication
by Daniel A. Steffen 21 Apr '10

21 Apr '10

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Hi Joel, On Apr 21, 2010, at 12:05 PM, Joel Reymont wrote: > I looked at using dispatch queues at first but got stuck. This may be just the opportunity to get me over the stumbling block! This is the crucial bit of code that I can't figure out how to translate to dispatch queues: > > static IONotificationPortRef __NotifyPort; > > // add notification port and run loop source for async notifications > > __NotifyPort = IONotificationPortCreate(masterPort); > runLoopSource = IONotificationPortGetRunLoopSource(__NotifyPort); > __MeasatRunLoop = CFRunLoopGetCurrent(), > CFRunLoopAddSource(__MeasatRunLoop, runLoopSource, kCFRunLoopDefaultMode); instead of these three lines instead, all that should be needed is IONotificationPortSetDispatchQueue(__NotifyPort, some_queue) with some_queue the dispatch queue on which you want IOKit to invoke your callbacks > // set up notification to detect plugging of Measat without firmware > > kr = IOServiceAddMatchingNotification( __NotifyPort, > kIOFirstMatchNotification, > matchingDict, > RawDeviceAdded, > NULL, > &__RawAddedIter ); > > I see dispatch_source_create as a candidate to replace CFRunLoopAddSource but what dispatch source type should I use? There's one for Mach receive and one for Mach send. Which one should I use with the Mach port behind the IO Notification Port? I'm assuming here that I need to get hold of the underlying Mach port. IONotificationPortSetDispatchQueue() will set up a MACH_RECV dispatch source and handles mach message reception & decoding for you. You would have to do this yourself if you were to setup your own DISPATCH_SOURCE_TYPE_MACH_RECV source on the port returned by IONotificationPortGetMachPort() (which is probably not even possible with the messages sent by IOKit), a MACH_RECV dispatch source only notifies you when messages are available on the port, it does not receive or decode them. Cheers, Daniel _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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Re: using grand central dispatch with c++ for inter-thread communication
by Joel Reymont 21 Apr '10

21 Apr '10

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:subject:mime-version :content-type:from:in-reply-to:date:cc:content-transfer-encoding :message-id:references:to:x-mailer; bh=2XHdKGAI7S9cc8LfHu+8Y7jk+5RuFBufiu2gFUqBCSE=; b=NVgFlW+OPoljDd28sqd3vnI0rCYE+kUk5ww/alB/FoVbpCAyEF9ojiPd5HJiYon7Ev PUmcesa1suaMXxebow7sTXkr3rMNwzqodONI48hFql+3k+QvdnJkTNkGKMq2/b1prwF7 nZE4IiMDxRRg3iPV+L+7qnD1zKhqhQmHsP2Ow= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=subject:mime-version:content-type:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to:x-mailer; b=QuzXcLdMj1acQT+qI9LAKl7kh6DR6s+WPWbt6/rJqFEitujlVNzaiTGBIMPovgsecW GQvWDja2Pd3z5mLwAep0SuMWon9/EyOVrlrfG6i0WsWiIQP9IQEL/eT5WtPs3yiWsSI4 RMF4O6+fDZbkKFJJfptFkdr6fYKWUlRPbkBeE= On Apr 21, 2010, at 7:37 PM, Kevin Van Vechten wrote: > The API for CFRunLoop requires that you manage the threads yourself. The goal of GCD is for you to work with queues that may or may not be backed by threads at any given time. I looked at using dispatch queues at first but got stuck. This may be just the opportunity to get me over the stumbling block! This is the crucial bit of code that I can't figure out how to translate to dispatch queues: static IONotificationPortRef __NotifyPort; // add notification port and run loop source for async notifications __NotifyPort = IONotificationPortCreate(masterPort); runLoopSource = IONotificationPortGetRunLoopSource(__NotifyPort); // set up run loop for our driver thread __MeasatRunLoop = CFRunLoopGetCurrent(), CFRunLoopAddSource(__MeasatRunLoop, runLoopSource, kCFRunLoopDefaultMode); and then // set up notification to detect plugging of Measat without firmware kr = IOServiceAddMatchingNotification( __NotifyPort, kIOFirstMatchNotification, matchingDict, RawDeviceAdded, NULL, &__RawAddedIter ); I see dispatch_source_create as a candidate to replace CFRunLoopAddSource but what dispatch source type should I use? There's one for Mach receive and one for Mach send. Which one should I use with the Mach port behind the IO Notification Port? I'm assuming here that I need to get hold of the underlying Mach port. Thanks, Joel --- http://es.linkedin.com/in/joelreymont http://twitter.com/wagerlabs _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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