February 2012 - Darwin-dev - lists.apple.com

Re: identifying optical media
by Alexander von Below 04 Feb '12

04 Feb '12

Well, yes :D What you want to investigate is the IOKit Registry. I don't have the sample code on this machine, please have a look at this: https://developer.apple.com/library/mac/#documentation/DeviceDrivers/Concep… If you encounter problems let me know. I have the sample code somewhere Alex Am 04.02.2012 um 10:25 schrieb Alex Reynolds: > I'd like to discern read-only media from optical media, as well as get information about the optical media. > > Basically, I am looking for information about the programmatic equivalent of running "diskutil info /Volume/XYZ" and getting "Optical Drive" and/or "Optical Media" entries when a CD or DVD is inserted, which are not visible for other mounted media. > > Does this help clarify? > > Thanks, > Alex > > On Feb 4, 2012, at 12:45 AM, Alexander von Below wrote: > >> Maybe ... what is really your question? Is the goal to display "Hey, this is an optical disc", or are you looking to achieve a different goal? >> >> Knowing what you want to do with this information helps to give you a better answer >> >> Alex >> D >> Am 04.02.2012 um 00:42 schrieb Alex Reynolds: >> >>> Is there a programmatic method by which one can determine if a mounted disk is optical, e.g., CD or DVD? >>> >>> Thanks, >>> Alex >>> >>> _______________________________________________ >>> 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: >>> https://lists.apple.com/mailman/options/darwin-dev/below%40mac.com >>> >>> This email sent to below(a)mac.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: https://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.ap… This email sent to site_archiver(a)lists.apple.com

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Re: identifying optical media
by Alex Reynolds 04 Feb '12

04 Feb '12

I'd like to discern read-only media from optical media, as well as get information about the optical media. Basically, I am looking for information about the programmatic equivalent of running "diskutil info /Volume/XYZ" and getting "Optical Drive" and/or "Optical Media" entries when a CD or DVD is inserted, which are not visible for other mounted media. Does this help clarify? Thanks, Alex On Feb 4, 2012, at 12:45 AM, Alexander von Below wrote: > Maybe ... what is really your question? Is the goal to display "Hey, this is an optical disc", or are you looking to achieve a different goal? > > Knowing what you want to do with this information helps to give you a better answer > > Alex > D > Am 04.02.2012 um 00:42 schrieb Alex Reynolds: > >> Is there a programmatic method by which one can determine if a mounted disk is optical, e.g., CD or DVD? >> >> Thanks, >> Alex >> >> _______________________________________________ >> 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: >> https://lists.apple.com/mailman/options/darwin-dev/below%40mac.com >> >> This email sent to below(a)mac.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: https://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.ap… This email sent to site_archiver(a)lists.apple.com

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Re: identifying optical media
by Alexander von Below 04 Feb '12

04 Feb '12

Maybe ... what is really your question? Is the goal to display "Hey, this is an optical disc", or are you looking to achieve a different goal? Knowing what you want to do with this information helps to give you a better answer Alex D Am 04.02.2012 um 00:42 schrieb Alex Reynolds: > Is there a programmatic method by which one can determine if a mounted disk is optical, e.g., CD or DVD? > > Thanks, > Alex > > _______________________________________________ > 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: > https://lists.apple.com/mailman/options/darwin-dev/below%40mac.com > > This email sent to below(a)mac.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: https://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.ap… This email sent to site_archiver(a)lists.apple.com

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Re: Rebuilding SMB 431.11
by Syl-J CALIMPUSAN 04 Feb '12

04 Feb '12

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identifying optical media
by Alex Reynolds 03 Feb '12

03 Feb '12

Is there a programmatic method by which one can determine if a mounted disk is optical, e.g., CD or DVD? Thanks, Alex _______________________________________________ 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: https://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.ap… This email sent to site_archiver(a)lists.apple.com

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Re: recursive mutexes in Lion?
by Tilghman Lesher 03 Feb '12

03 Feb '12

On Thu, Feb 2, 2012 at 8:48 PM, Jack Howarth <howarth(a)bromo.med.uc.edu> wrote: > Isn't there an additional bug here in pthread.h? Currently you get different code when > targeting 10.6 on Lion (use of recursive mutexes) compared to targeting 10.6 on SL? Shouldn't > you have an additional wrapper like... > <snip> > > to prevent recursive mutex from being used when targeting earlier releases than Lion? > Perhaps this should be another radar? Uh, why? Recursive mutexes work just fine on earlier versions, in at least Tiger and Snow Leopard (and earlier versions, too, probably). -Tilghman _______________________________________________ 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: https://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.ap… This email sent to site_archiver(a)lists.apple.com

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Re: Rebuilding SMB 431.11
by Steve Checkoway 03 Feb '12

03 Feb '12

On Feb 2, 2012, at 5:11 PM, Syl-J CALIMPUSAN wrote: > Missing this header file: NetFS/NetFSPrivate.h Any ideas where to download it? Could not find it in the developer site. >From <https://developer.apple.com/library/mac/#documentation/MacOSX/Conceptual/OS…>, it is clear that NetFS was added in 10.6 which does not support PowerPC. You're not going to be able to use that framework with PowerPC code. -- Stephen Checkoway _______________________________________________ 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: https://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.ap… This email sent to site_archiver(a)lists.apple.com

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Re: recursive mutexes in Lion?
by Jack Howarth 03 Feb '12

03 Feb '12

On Tue, Jan 31, 2012 at 02:27:10PM -0800, Greg Parker wrote: > On Jan 31, 2012, at 1:26 PM, Greg Parker <gparker(a)apple.com> wrote: > > On Jan 31, 2012, at 11:58 AM, Jack Howarth <howarth(a)bromo.med.uc.edu> wrote: > >> The upcoming FSF gcc 4.7 release seems to have uncovered that the claimed > >> recursive mutex support in pthread.h for Lion is broken... > >> > >> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51906 > >> > >> ---- pthread_test.C ---- > >> #include <pthread.h> > >> #include <stdio.h> > >> > >> /* int pthread_mutexatttr_settype(pthread_mutexattr_t *attr, int type); */ > >> > >> int main() > >> { > >> /* or PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP */ > >> pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER; > >> pthread_mutexattr_t mta; > >> > >> /* pthread_mutexattr_init(&mta); */ > >> /* or PTHREAD_MUTEX_RECURSIVE_NP */ > >> printf(" returned %d\n",pthread_mutexattr_settype(&mta, PTHREAD_MUTEX_RECURSIVE)); > >> printf(" returned %d\n",pthread_mutex_trylock(&mutex)); > >> } > > > > Why is the call to pthread_mutexattr_init() commented out? Does it work when you call pthread_mutexattr_init() first? > > > > I would not be surprised if pthread_mutexattr_settype() fails with EINVAL when given an uninitialized attr variable. > > Turns out there is a bug here that the gcc tests uncovered, but the code above doesn't show it. > > The problem is that pthread_mutex_trylock() does not recognize PTHREAD_RECURSIVE_MUTEX_INITIALIZER. If you use that static initializer and the first operation on the mutex is pthread_mutex_trylock() then it will fail with EINVAL. > > A recursive mutex using pthread_mutex_init() works. A recursive mutex for which > the first operation is pthread_mutex_lock() also works. > > > % clang test.c && ./a.out > pthread_mutex_trylock mutex1 returned 22 > > % cat test.c > #include <pthread.h> > #include <stdio.h> > int main() { > int err; > > // fails: pthread_mutex_trylock of statically-initialized recursive mutex > pthread_mutex_t mutex1 = PTHREAD_RECURSIVE_MUTEX_INITIALIZER; > err = pthread_mutex_trylock(&mutex1); > if (err) printf("pthread_mutex_trylock mutex1 returned %d\n", err); > > // succeeds: pthread_mutex_lock of statically-initialized recursive mutex > pthread_mutex_t mutex2 = PTHREAD_RECURSIVE_MUTEX_INITIALIZER; > err = pthread_mutex_lock(&mutex2); > if (err) printf("pthread_mutex_lock mutex2 returned %d\n", err); > } > > > -- > Greg Parker gparker(a)apple.com Runtime Wrangler > Greg, Isn't there an additional bug here in pthread.h? Currently you get different code when targeting 10.6 on Lion (use of recursive mutexes) compared to targeting 10.6 on SL? Shouldn't you have an additional wrapper like... #if defined(__MAC_OS_X_VERSION_MIN_REQUIRED) && (__MAC_OS_X_VERSION_MIN_REQUIRED >= 1070) #if (!defined(_POSIX_C_SOURCE) && !defined(_XOPEN_SOURCE)) || defined(_DARWIN_C_SOURCE) #define PTHREAD_ERRORCHECK_MUTEX_INITIALIZER {_PTHREAD_ERRORCHECK_MUTEX_SIG_init, {0}} #define PTHREAD_RECURSIVE_MUTEX_INITIALIZER {_PTHREAD_RECURSIVE_MUTEX_SIG_init, {0}} #endif /* (!_POSIX_C_SOURCE && !_XOPEN_SOURCE) || _DARWIN_C_SOURCE */ #endif /* (__MAC_OS_X_VERSION_MIN_REQUIRED) && (__MAC_OS_X_VERSION_MIN_REQUIRED >= 1070) */ to prevent recursive mutex from being used when targeting earlier releases than Lion? Perhaps this should be another radar? Jack _______________________________________________ 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: https://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.ap… This email sent to site_archiver(a)lists.apple.com

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Re: Rebuilding SMB 431.11
by Syl-J CALIMPUSAN 03 Feb '12

03 Feb '12

_______________________________________________ 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: https://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.ap… This email sent to site_archiver(a)lists.apple.com

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Re: Rebuilding SMB 431.11
by Syl-J CALIMPUSAN 02 Feb '12

02 Feb '12

_______________________________________________ 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: https://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.ap… This email sent to site_archiver(a)lists.apple.com

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