September 2007 - Darwin-dev

Re: Identifying directory changes with kqueue/kevent
by Finlay Dobbie 19 Sep '07

19 Sep '07

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=beta; h=domainkey-signature:received:received:message-id:date:from:reply-to:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; bh=Dy6KGzKojDZGhgzi3OSeakChyL2M5GNWlPBstVdoY1g=; b=EjOMDPVDPUmlSH0M3R+JFh7Qeexys/w1TE8UYB8o2B5uEROq6tuXYQnRkPKgFKxoQADri3eqrQWesRX8yEyobPUeH5SQlz5YZfWCKVrjq7rvmcZtQ8Vpcf975uyDkbrKI0lYChJWRSVCw556pCjWjGkjP+bnqkQh04OY+2Lke68= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:reply-to:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=be/Z3m952xYtyjMbCcUVsduyA6ovB+BTx+lYCTdWzc5KndcHPm5gvFJ4dAJHBfPTKzNQFedA356un6SEVRwecgP11EplJJ2vUiUfiRqr+sPp3piDuv/6k4D1rhVMIKcG77Kzs0/paadsJlsGwOqAgNWEqQpfCLsbyR/Id81t+zY= On 19/09/2007, Fred Leboucher <fred.leboucher(a)free.fr> wrote: > Except that my code has to be compatible with 10.3.9 and higher :/ Polling for fun and profit.... :-( -- Finlay _______________________________________________ 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: Identifying directory changes with kqueue/kevent
by Fred Leboucher 19 Sep '07

19 Sep '07

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Except that my code has to be compatible with 10.3.9 and higher :/ On Sep 19, 2007, at 5:56 PM, Dave Zarzycki wrote: It sounds like you want the new FSEvents API in Leopard. On Sep 19, 2007, at 8:43 AM, Fred Leboucher wrote: Hi, _______________________________________________ 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… I'm trying to watch a directory for changes, so the couple kqueue/ kevent could do the job (aside from the Carbon FNSubscribe). Only problem is that, like FNSubscribe, kqueue/kevent can't tell what file in the directory changed (or maybe I missed something ?). So, is there any simple way to identify the changed file, or do I have to keep track of all files in the directory, and compare this to the directory every time a change occurs ? This could be quite expensive and handling events like file renaming would be a real pain... Thanks Fred _______________________________________________ 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/zarzycki% 40apple.com This email sent to zarzycki(a)apple.com This email sent to site_archiver(a)lists.apple.com

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Re: Identifying directory changes with kqueue/kevent
by Dave Zarzycki 19 Sep '07

19 Sep '07

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com It sounds like you want the new FSEvents API in Leopard. On Sep 19, 2007, at 8:43 AM, Fred Leboucher wrote: Hi, Thanks Fred _______________________________________________ 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/zarzycki%40apple.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… I'm trying to watch a directory for changes, so the couple kqueue/ kevent could do the job (aside from the Carbon FNSubscribe). Only problem is that, like FNSubscribe, kqueue/kevent can't tell what file in the directory changed (or maybe I missed something ?). So, is there any simple way to identify the changed file, or do I have to keep track of all files in the directory, and compare this to the directory every time a change occurs ? This could be quite expensive and handling events like file renaming would be a real pain... This email sent to zarzycki(a)apple.com This email sent to site_archiver(a)lists.apple.com

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Identifying directory changes with kqueue/kevent
by Fred Leboucher 19 Sep '07

19 Sep '07

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Hi, Thanks Fred _______________________________________________ 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… I'm trying to watch a directory for changes, so the couple kqueue/ kevent could do the job (aside from the Carbon FNSubscribe). Only problem is that, like FNSubscribe, kqueue/kevent can't tell what file in the directory changed (or maybe I missed something ?). So, is there any simple way to identify the changed file, or do I have to keep track of all files in the directory, and compare this to the directory every time a change occurs ? This could be quite expensive and handling events like file renaming would be a real pain... This email sent to site_archiver(a)lists.apple.com

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Posix shared memory - permission problems?
by Tom O'Grady 19 Sep '07

19 Sep '07

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.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: Including arpa/nameser_compat.h
by Marc Majka 18 Sep '07

18 Sep '07

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com -- Marc On 18 Sep, 2007, at 13:40, Bhavesh Davda wrote: Thanks Marc! Guess I should have asked before I spent all the effort hand parsing the DNS message, huh? :) Oh well... May be the code will get cleaner and more portable across different OSes doing it this way instead. - Bhavesh #define ns_msg_id(handle) ((handle)._id + 0) #define ns_msg_base(handle) ((handle)._msg + 0) #define ns_msg_end(handle) ((handle)._eom + 0) #define ns_msg_size(handle) ((handle)._eom - (handle)._msg) #define ns_msg_count(handle, section) ((handle)._counts[section] + 0) -- Marc Majka On 18 Sep, 2007, at 13:10, Bhavesh Davda wrote: So I just noticed that Mac OS X 10.4 uses bind 9 headers in arpa/nameser.h, and includes arpa/nameser8_compat.h if BIND_8_COMPAT is defined. Thanks -- Bhavesh P. Davda _______________________________________________ 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/majka%40apple.com This email sent to majka(a)apple.com -- Bhavesh P. Davda _______________________________________________ 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… I should mention (and promote!) the APIs in <dns.h> and <dns_util.h>. There's a nice parser in there. See dns_parse_packet(). Only in Mac OS / Darwin, however. On 9/18/07, Marc Majka <majka(a)apple.com> wrote: BIND 9 replaced the visible HEADER struct with a new struct named ns_msg, and set of accessor macros in <nameser.h> The "handle" here is an ns_msg struct. Pass the message bytes, length of the packet, and a pointer to an ns_msg to ns_initparse (see <resolv.h>). It fills in the ns_msg handle and you can pull out the parts with the accessor macros. See, for example, res_pquery() in res_debug.c (http://www.opensource.apple.com/darwinsource/10.4.9.ppc/netinfo-369.5/resol… ) I also saw some older posts to this mailing list indicating that programs should stay away from using BIND_8_COMPAT because it is being deprecated. So what should I do as a programmer who needs the definition of struct HEADER from arpa/nameser_compat.h (also in arpa/nameser8_compat.h)? This email sent to site_archiver(a)lists.apple.com

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Re: Including arpa/nameser_compat.h
by Bhavesh Davda 18 Sep '07

18 Sep '07

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=beta; 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=v+tl0BalzzP/UefIWXMYA/hWrzNyfVba69V4veE49IE=; b=HK9DwylDtwDIaIES+thyywygKWfiJuy5hNTfdPQ0+LDmN+Ga/a8Mz/JRcWZ+6/n7vdnJoy0JwZjJHWirXl0PM2LnhNOXTfZv/gsMwouC0o4nCQdtr6v6s6PZL1a/EYSoi2S+26Gg5oukM2oqyEGy9FBme9d76bKVD+ZGZ7xgGzQ= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=ZW1rGMBNxVVYckxv27q5keQocXUV4UJTpdFM3i+HGh9y1CK21iISNr4C02SGjLuHCIe7wV682Aosy0aywEbBroqkMJjiaPSiw9dfxFwM9qerssLwIX6ONde52qhR2qy6M0RXJqTCeIp2+5vv+wAHEK9zrQHpex4L4pwoGML/CkA= Thanks Marc! Guess I should have asked before I spent all the effort hand parsing the DNS message, huh? :) Oh well... May be the code will get cleaner and more portable across different OSes doing it this way instead. - Bhavesh On 9/18/07, Marc Majka <majka(a)apple.com> wrote: > BIND 9 replaced the visible HEADER struct with a new struct named ns_msg, > and set of accessor macros in <nameser.h> > > > #define ns_msg_id(handle) ((handle)._id + 0) > #define ns_msg_base(handle) ((handle)._msg + 0) > #define ns_msg_end(handle) ((handle)._eom + 0) > #define ns_msg_size(handle) ((handle)._eom - (handle)._msg) > #define ns_msg_count(handle, section) ((handle)._counts[section] + 0) > > The "handle" here is an ns_msg struct. Pass the message bytes, length of > the packet, and a pointer to an ns_msg to ns_initparse (see <resolv.h>). It > fills in the ns_msg handle and you can pull out the parts with the accessor > macros. > > See, for example, res_pquery() in res_debug.c > (http://www.opensource.apple.com/darwinsource/10.4.9.ppc/netinfo-369.5/resol…) > > -- > Marc Majka > > > On 18 Sep, 2007, at 13:10, Bhavesh Davda wrote: > > So I just noticed that Mac OS X 10.4 uses bind 9 headers in > arpa/nameser.h, and includes arpa/nameser8_compat.h if BIND_8_COMPAT > is defined. > > I also saw some older posts to this mailing list indicating that > programs should stay away from using BIND_8_COMPAT because it is being > deprecated. > > So what should I do as a programmer who needs the definition of struct > HEADER from arpa/nameser_compat.h (also in arpa/nameser8_compat.h)? > > Thanks > > -- > Bhavesh P. Davda > _______________________________________________ > 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/majka%40apple.com > > This email sent to majka(a)apple.com > > -- Bhavesh P. Davda _______________________________________________ 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: Including arpa/nameser_compat.h
by Marc Majka 18 Sep '07

18 Sep '07

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.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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Including arpa/nameser_compat.h
by Bhavesh Davda 18 Sep '07

18 Sep '07

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=beta; h=domainkey-signature:received:received:message-id:date:from:to:subject:mime-version:content-type:content-transfer-encoding:content-disposition; bh=6rh7D7FiyFl1adHtKqJTb9h3cxwKawqoqz9kUughJRo=; b=kbxJW4/X0Ll9KiuxK3EHTcDl73weHBcaeLVE8VKBK9KbxSsMbP7fjhZsj0vqNFe+yEICSDGtQUl/EigpanON31VlW7/M7ys6vGKDPI3ddP2kRU0yU3WfBR/B4BhKVtZSnkvzvQewDHwJk7lO+JrRZ1Jj37BNk9jqd+ONm58Ez0U= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:to:subject:mime-version:content-type:content-transfer-encoding:content-disposition; b=HwTh0fKd5+5dBRzSATyRA6Mi6w/PMh/VQR7GZy/xL1aqdzjNd/4iouBmXK71/+bd/IKpQPBCjur25CS/F7STm1M0pP/FANUes4CxRrycc1Zq+VS4SWAwme0wkalws9vV3HSnUBH+0hZYgJjuNkapS8xEjJktXZJBVP0Zri619Kw= So I just noticed that Mac OS X 10.4 uses bind 9 headers in arpa/nameser.h, and includes arpa/nameser8_compat.h if BIND_8_COMPAT is defined. I also saw some older posts to this mailing list indicating that programs should stay away from using BIND_8_COMPAT because it is being deprecated. So what should I do as a programmer who needs the definition of struct HEADER from arpa/nameser_compat.h (also in arpa/nameser8_compat.h)? Thanks -- Bhavesh P. Davda _______________________________________________ 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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thread_policy_set
by Jeremy Todd 18 Sep '07

18 Sep '07

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Thread-index: Acf6HshU1XEi/CyCS4eix7ZFDwGEVw== Hi there, I'm a bit confused about one aspect of the thread precedence scheduling policy. My understanding was that calling thread_policy_set with THREAD_PRECEDENCE_POLICY would let me set an importance for a thread relative to other threads in my process. I have an application with the main thread, thread A and thread B. If thread A has a lot of work to do, I'd like it to take precedence over thread B. I tried passing an importance of -1 for thread B, while keeping thread A set to the default value of zero. This didn't have much effect. If I pass -20 for thread B's importance, however, then the app behaves as desired. Can anyone tell me the meaning of the THREAD_PRECEDENCE_POLICY "importance" value? I had understood that it was only interpreted relative to other threads in my process, but now I think it might be mapped to some scale where its value has meaning, in which case I'll need some basis for deciding what value to use in my application. Regards, Jeremy Todd _______________________________________________ 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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