C++Talk.NET C++ language newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Scheduling Tasks          C++Talk.NET Forum Index -> C++ language (comp.lang.c++) View previous topic :: View next topic   Author Message Joe Guest Posted: Fri Mar 05, 2004 12:37 am    Post subject: Scheduling Tasks I have a scheduling file that has new entries added to it at random intervals. I wish to poll this file (say every 15 seconds) and see if there are new entries. If there is, I then need to run another task at time in the file entry. Could someone give me a few pointers about how to go about this? I am programming in Windows, so would using the Task Scheduler be the best option? I would prefer not to rely on this, because it is easily disabled, and interfered with by the user. TIA, Joe. Also, can I check whether there is better place to ask "newbie" questions? I am teaching myself c++ as I go, and so I have lots of questions, most of which are probably pretty basic to the people reading this group. Is this the place to ask them? I don't want to bombard the place with irritating questions. Should I give some indication of that they are simple questions in the subject line? Back to top Julie Guest Posted: Fri Mar 05, 2004 12:43 am    Post subject: Re: Scheduling Tasks Joe wrote: Quote: I have a scheduling file that has new entries added to it at random intervals. I wish to poll this file (say every 15 seconds) and see if there are new entries. If there is, I then need to run another task at time in the file entry. Could someone give me a few pointers about how to go about this? I am programming in Windows, so would using the Task Scheduler be the best option? I would prefer not to rely on this, because it is easily disabled, and interfered with by the user. TIA, Joe. Also, can I check whether there is better place to ask "newbie" questions? I am teaching myself c++ as I go, and so I have lots of questions, most of which are probably pretty basic to the people reading this group. Is this the place to ask them? I don't want to bombard the place with irritating questions. Should I give some indication of that they are simple questions in the subject line? http://www.parashift.com/c++-faq-lite/how-to-post.html#faq-5.9 Back to top Chris ( Val ) Guest Posted: Fri Mar 05, 2004 11:49 am    Post subject: Re: Scheduling Tasks "Joe" <anon (AT) anon (DOT) com> wrote Quote: I have a scheduling file that has new entries added to it at random intervals. I wish to poll this file (say every 15 seconds) and see if there are new entries. If there is, I then need to run another task at time in the file entry. Could someone give me a few pointers about how to go about this? I am programming in Windows, so would using the Task Scheduler be the best [snip] Oop's, you posted to the wrong group . Please try a Windows group - This group limits it's discussions to the Standard C++ language only. Cheers. Chris Val Back to top Joe Guest Posted: Fri Mar 05, 2004 11:53 am    Post subject: Re: Scheduling Tasks "Chris ( Val )" <chrisval (AT) bigpond (DOT) com.au> wrote Quote: "Joe" <anon (AT) anon (DOT) com> wrote in message news:BXP1c.13214$x37.9779 (AT) newsfe3-win (DOT) server.ntli.net... | I have a scheduling file that has new entries added to it at random | intervals. I wish to poll this file (say every 15 seconds) and see if there | are new entries. If there is, I then need to run another task at time in the | file entry. Could someone give me a few pointers about how to go about this? | | I am programming in Windows, so would using the Task Scheduler be the best [snip] Oop's, you posted to the wrong group . Please try a Windows group - This group limits it's discussions to the Standard C++ language only. Cheers. Chris Val Ok, just ignore that line. Is there a good method of doing it in standard C++? Or is a "good" method always going to be platform dependent? Joe. Back to top Chris ( Val ) Guest Posted: Fri Mar 05, 2004 11:59 am    Post subject: Re: Scheduling Tasks "Joe" <anon (AT) anon (DOT) com> wrote Quote: "Chris ( Val )" <chrisval (AT) bigpond (DOT) com.au> wrote in message news:c29pfv$1qvs2u$1 (AT) ID-110726 (DOT) news.uni-berlin.de... "Joe" <anon (AT) anon (DOT) com> wrote in message news:BXP1c.13214$x37.9779 (AT) newsfe3-win (DOT) server.ntli.net... | I have a scheduling file that has new entries added to it at random | intervals. I wish to poll this file (say every 15 seconds) and see if there | are new entries. If there is, I then need to run another task at time in the | file entry. Could someone give me a few pointers about how to go about this? | | I am programming in Windows, so would using the Task Scheduler be the best [snip] Oop's, you posted to the wrong group . Please try a Windows group - This group limits it's discussions to the Standard C++ language only. Cheers. Chris Val Ok, just ignore that line. Is there a good method of doing it in standard C++? Or is a "good" method always going to be platform dependent? No, unfortunately there is no built in functionality in C++ to support this kind of stuff. About the best thing you can do, is use std::system() from <cstdlib>, to invoke the windows task schedular. Note however, this will not be portable code - if that is what you're looking for. Cheers. Chris Val Back to top Karl Heinz Buchegger Guest Posted: Fri Mar 05, 2004 3:22 pm    Post subject: Re: Scheduling Tasks "Chris ( Val )" wrote: Quote: "Joe" <anon (AT) anon (DOT) com> wrote in message news:HRZ1c.13450$x37.5225 (AT) newsfe3-win (DOT) server.ntli.net... | | "Chris ( Val )" <chrisval (AT) bigpond (DOT) com.au> wrote in message | news:c29pfv$1qvs2u$1 (AT) ID-110726 (DOT) news.uni-berlin.de... | | > "Joe" <anon (AT) anon (DOT) com> wrote in message | > news:BXP1c.13214$x37.9779 (AT) newsfe3-win (DOT) server.ntli.net... | > | I have a scheduling file that has new entries added to it at random | > | intervals. I wish to poll this file (say every 15 seconds) and see if | there | > | are new entries. If there is, I then need to run another task at time in | the | > | file entry. Could someone give me a few pointers about how to go about | this? | > | [snip] | Ok, just ignore that line. Is there a good method of doing it in standard | C++? Or is a "good" method always going to be platform dependent? No, unfortunately there is no built in functionality in C++ to support this kind of stuff. Well. Actually there is a way. You could use the time functions to poll the current time and when 15 seconds have passed: open file, read file, build up data structure In the same loop, you check the current time and when the time specified has reached you start the task using system(). But: It's not a good idea to do it that way So Chris is right: you need to use some system specific extensions to fight that beast. YOu can adopt the above scheme but you will need some sort of sleep() or delay() call to keep CPU usage low. -- Karl Heinz Buchegger [email]kbuchegg (AT) gascad (DOT) at[/email] Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         C++Talk.NET Forum Index -> C++ language (comp.lang.c++) All times are GMT Page 1 of 1   Jump to: Select a forum C/C++----------------C LanguageC Language (Moderated)C++ Language (Moderated)C++ language (comp.lang.c++)C++ language, library and standards Non-English C/C++ Newsgroups----------------C++ (German)C++ (French)  You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum Powered by phpBB © 2001, 2006 phpBB Group SEO toolkit © 2004-2006 webmedic.