April 2008 - Darwin-dev - lists.apple.com

Re: strptime cannot parse date older than 1938
by Steve Checkoway 24 Apr '08

24 Apr '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On Apr 24, 2008, at 4:05 AM, Martin Costabel wrote: date -r 0 Ah, now it makes sense to me. Thanks for the correction. -- Steve Checkoway "Anyone who says that the solution is to educate the users hasn't ever met an actual user." -- Bruce Schneier _______________________________________________ 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 To elaborate: "Epoch" is "00:00:00 UTC, January 1, 1970" (see man date), and this can be a date in 1969 or in 1970, depending on your timezone. Try to see what it is in your case. smime.p7s

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Re: Where is atomicqueue?
by Army Research Lab 24 Apr '08

24 Apr '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Thread-index: AcimMX9Vvc+sOBIkEd2sUAAdT0T19A== Thread-topic: Where is atomicqueue? User-agent: Microsoft-Entourage/11.4.0.080122 On 4/24/08 11:40 AM, "Shawn Erickson" <shawnce(a)gmail.com> wrote: > On Thu, Apr 24, 2008 at 8:30 AM, Shawn Erickson <shawnce(a)gmail.com> wrote: >> On Thu, Apr 24, 2008 at 4:35 AM, Army Research Lab <ckaran(a)arl.army.mil> >> wrote: >>> I've been poking through the man pages, and discovered the docs for >>> <libkern/OSAtomic.h>; I see the documentation for atomic and for spinlock, >>> but 'man barrier' also lists atomicqueue. Unfortunately, although the man >>> pages claim that I should find it, it isn't there. I also can't find >>> anything like it in /usr/include. Does it exist? >>> >>> BTW, I'm looking at all of this on a OS X 10.4.11 machine... >> >> >> <http://developer.apple.com/documentation/Cocoa/Conceptual/Multithreading/Thr >> eadSafety/chapter_5_section_6.html> >> >> [0:505] > find /usr/include -name "OSAtomic.h" >> /usr/include/libkern/OSAtomic.h >> >> That is on a 10.4.11 system with Xcode 2.5. > > Ah maybe you are talking about that header not containing the > definition for OSAtomic queue? > > From the 10.5 man page... > > "Most of these functions first appeared in Mac OS 10.4 (Tiger). The > "Orig" forms of the boolean operations, the "int", "long" and "ptr" > forms of compare-and-swap, and lockless enqueue/dequeue first appeared > in Mac OS 10.5 (Leopard)." > > The atomic queue does exist on 10.4 when in the kernel. OK, maybe that is the problem then; I did look in /usr/include/libkern/OSAtomic.h before I posted, but there is just a comment about the queue, not the queue itself. Do I have to download the Darwin sources to get access to it? Note that I'm just curious here, the only thing I need is spinlock, and if I'm clever, I won't even need that. Thanks, Cem Karan _______________________________________________ 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: Where is atomicqueue?
by Shawn Erickson 24 Apr '08

24 Apr '08

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:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; bh=wrcV7u1d01vl18i4P1t9gGPOUkoAXKhsX2Q9liIEkVU=; b=dNQe8ZsjGDlPBQeLukgsTFhRNVDEhq6wnGaXTeBMxzbDHv7wD0mKEQ5wH3eHDgn8zKQnf5bXG1QB581GN+c81Bq5jK3XAEZ9eKIqDKO5ZwZi8o8nf8qPfWrXerHdu8jm2wSQsRUKIJ4g60jcLOTskU8rJ5WV6Kwmj2l4IeFL7kE= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=eYYAnkDPuyqc5qVtxB2XkOyMOKBeX5yIGpNhsHhGXHERS8EfUndqwlKSHJ2BwAKeniIBlt9yAaK+wY9FNGx+i0/7z816Wo5qDrqXJjkeeHpcpief8rQt+/4lXaHPZye2aF74h8ABDwDD8ksGBSjzYrAChPTmwsfDyzS9yQJ49J4= On Thu, Apr 24, 2008 at 8:30 AM, Shawn Erickson <shawnce(a)gmail.com> wrote: > On Thu, Apr 24, 2008 at 4:35 AM, Army Research Lab <ckaran(a)arl.army.mil> wrote: > > I've been poking through the man pages, and discovered the docs for > > <libkern/OSAtomic.h>; I see the documentation for atomic and for spinlock, > > but 'man barrier' also lists atomicqueue. Unfortunately, although the man > > pages claim that I should find it, it isn't there. I also can't find > > anything like it in /usr/include. Does it exist? > > > > BTW, I'm looking at all of this on a OS X 10.4.11 machine... > > <http://developer.apple.com/documentation/Cocoa/Conceptual/Multithreading/Th…> > > [0:505] > find /usr/include -name "OSAtomic.h" > /usr/include/libkern/OSAtomic.h > > That is on a 10.4.11 system with Xcode 2.5. Ah maybe you are talking about that header not containing the definition for OSAtomic queue? >From the 10.5 man page... "Most of these functions first appeared in Mac OS 10.4 (Tiger). The "Orig" forms of the boolean operations, the "int", "long" and "ptr" forms of compare-and-swap, and lockless enqueue/dequeue first appeared in Mac OS 10.5 (Leopard)." The atomic queue does exist on 10.4 when in the kernel. -Shawn _______________________________________________ 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: Where is atomicqueue?
by Shawn Erickson 24 Apr '08

24 Apr '08

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:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; bh=ey/+KBUVG6LJUSlfsvA3rbk62bS6QUEH70MNA54cC+U=; b=UK7FLqMGs4g7K+RAInj/SyCs+cuSR2W+oB1NffWZi9oDR+t4OQuqlXCG8RASsM4vA5NywHE1cxeTL1xN1T3ehE0wiVWIKnBpgsshdhsdoyCxGXhXA9Lf5X33icxuU7Ui/qIB9aO9y/A8xAd6NoL6YSnhr2IHghw1rJm3qzdxHvI= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=o0aapuiMIIhiMUKdiFeEQwzHyqjc34SjRoJ18FF7PhyRzJhmLzveI63jzl/Op/9objcj4ppmQWKkgenvuf0BInTNEOJPC0LFuVMX4yrnLRQxClQVhRXfKrr/cQ9sqOK2xOeZELkKAfEue83VaJOShKyC/T11ZlUmhQNa9HrBe1o= On Thu, Apr 24, 2008 at 4:35 AM, Army Research Lab <ckaran(a)arl.army.mil> wrote: > I've been poking through the man pages, and discovered the docs for > <libkern/OSAtomic.h>; I see the documentation for atomic and for spinlock, > but 'man barrier' also lists atomicqueue. Unfortunately, although the man > pages claim that I should find it, it isn't there. I also can't find > anything like it in /usr/include. Does it exist? > > BTW, I'm looking at all of this on a OS X 10.4.11 machine... <http://developer.apple.com/documentation/Cocoa/Conceptual/Multithreading/Th…> [0:505] > find /usr/include -name "OSAtomic.h" /usr/include/libkern/OSAtomic.h That is on a 10.4.11 system with Xcode 2.5. -Shawn _______________________________________________ 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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Where is atomicqueue?
by Army Research Lab 24 Apr '08

24 Apr '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Thread-index: Acil/00ri7I05hHyEd2sUAAdT0T19A== Thread-topic: Where is atomicqueue? User-agent: Microsoft-Entourage/11.4.0.080122 I've been poking through the man pages, and discovered the docs for <libkern/OSAtomic.h>; I see the documentation for atomic and for spinlock, but 'man barrier' also lists atomicqueue. Unfortunately, although the man pages claim that I should find it, it isn't there. I also can't find anything like it in /usr/include. Does it exist? BTW, I'm looking at all of this on a OS X 10.4.11 machine... Thanks, Cem Karan _______________________________________________ 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: strptime cannot parse date older than 1938
by Martin Costabel 24 Apr '08

24 Apr '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com User-agent: Thunderbird 2.0.0.12 (Macintosh/20080213) In message <56752989-7D2E-4CEC-BE3D-24C5F6B45117(a)pahtak.org>, Steve Checkoway w rites: date -r 0 to see what it is in your case. -- Martin _______________________________________________ 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… Peter Seebach wrote: I didn't play with any other dates, but I have no idea how you're getting 70 from the program you pasted. 69 is incorrect, but at least makes sense. Time zone. To elaborate: "Epoch" is "00:00:00 UTC, January 1, 1970" (see man date), and this can be a date in 1969 or in 1970, depending on your timezone. Try This email sent to site_archiver(a)lists.apple.com

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Re: strptime cannot parse date older than 1938
by Surf Chen 24 Apr '08

24 Apr '08

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:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; bh=516trMwHN6IzNMyDBAgYLTnKPO7uSWQUs0C8e28ZkJ0=; b=kPLDVbHjWsOlAsywMlhrYYQ5JlDYARNOCpLNPiR6NMFhFv7niYZpwnZGA++CTf+hhbxK97fZVtjCmGKIWuFWIaW1fUyagps2VSswxgkaBwSWyM7bG3YNXorFJCDe1WOmGL8KkWoS1+qDlqObbLxX1pxqxvkByHASm+ehFGVNHgM= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=OJXUU2nfPBasWej+HDbgvGlaD2vk1zsjYTpwurBPN/eKHpucyVNHEf4UV5zvuDs9aFKIU4Cwq4mbwmh/RgcfgNwY2BjIo6BEhsEqIAWsO0EkLY8mm2QffeyPeg9Wg0SOUOszFaXhPBZeFuuJ8TlLIbI/75KthqYn1WVv6TAbpeU= Martin Costabel wrote: >Well, on the Mac it only works if you compile for a 64bit architecture. Does means that it internally uses the type time_t on mac osx? >You wrote "older than 1938" which is fine in English, but you did not mean 1938, you meant 2038. If in your program you write 1938 instead of 38 and %Y instead of %y, everything is OK. If you write 2038 and %Y, you get the same problem as for 38 and %y. oh...I make a big written mistake. Luckily everybody here knows the real meaning. _______________________________________________ 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: strptime cannot parse date older than 1938
by seebs＠seebs.net 24 Apr '08

24 Apr '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com In message <56752989-7D2E-4CEC-BE3D-24C5F6B45117(a)pahtak.org>, Steve Checkoway w rites: >I didn't play with any other dates, but I have no idea how you're >getting 70 from the program you pasted. 69 is incorrect, but at least >makes sense. Time zone. -s _______________________________________________ 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: strptime cannot parse date older than 1938
by Steve Checkoway 24 Apr '08

24 Apr '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On Apr 24, 2008, at 2:45 AM, Martin Costabel wrote: It is strange that I'm getting 69 while Surf Chen is getting 70 though. -- Steve Checkoway "Anyone who says that the solution is to educate the users hasn't ever met an actual user." -- Bruce Schneier _______________________________________________ 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 Surf Chen wrote: The Y2038 bug is the unix stamp time range(1970-2038)? I know that and know what difference of long between 32 and 64. But I think strptime is not relative to this issue,since the struct tm store each date parts in a int or a char*,not like the unix timestamp store as a long. The problem appears not to be the struct tm, but the conversion routine that perhaps somewhere internally uses the type time_t. And the codes works fine on my 32bit debian. Well, on the Mac it only works if you compile for a 64bit architecture. Interesting, I would not have thought that this would be the issue here since I was getting 69 and 1969+69 = 2038, the expected date. As you say, -arch ppc64 makes it work. smime.p7s

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Re: strptime cannot parse date older than 1938
by Steve Checkoway 24 Apr '08

24 Apr '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On Apr 24, 2008, at 12:43 AM, Surf Chen wrote: It is 70 ,not 69. Almost(few such as 1,Jan,2038 is parsed correctly) date strings later than 2038 is parsed as 70. steve$ cat date.c #include <stdio.h> #include <string.h> #include <time.h> int main() { char *date_str="Thu, 24-Apr-38 04:28:16 GMT"; struct tm tm; memset(&tm,0,sizeof(tm)); strptime(date_str,"%a, %d-%b-%y %H:%M:%S %Z",&tm); printf("%d\n",tm.tm_year); return 0; } steve$ gcc -Wall date.c steve$ ./a.out 69 -- Steve Checkoway "Anyone who says that the solution is to educate the users hasn't ever met an actual user." -- Bruce Schneier _______________________________________________ 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 I didn't play with any other dates, but I have no idea how you're getting 70 from the program you pasted. 69 is incorrect, but at least makes sense. smime.p7s

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