Messages in this thread | | | Date | Mon, 6 Oct 2003 08:52:31 -0400 (EDT) | From | "Richard B. Johnson" <> | Subject | Re: getting timestamp of last interrupt? |
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On Sat, 4 Oct 2003, Hans-Georg Thien wrote:
> Richard B. Johnson wrote: > > On Thu, 2 Oct 2003, Hans-Georg Thien wrote: > > > > > >>I am looking for a possibility to read out the last timestamp when an > >>interrupt has occured. > >> > >>e.g.: the user presses a key on the keyboard. Where can I read out the > >>timestamp of this event? > > > > > > You can get A SIGIO signal for every keyboard, (or other input) event. > > What you do with it is entirely up to you. Linux/Unix doesn't have > > "callbacks", instead it has signals. It also has select() and poll(), > > all useful for handling such events. If you want a time-stamp, you > > call gettimeofday() in your signal handler. > > > Thanks a lot Richard, > > ... but ... can I use signals in kernel mode?
Well you talked about the user pressing a key and getting a time-stamp as a result. If you need time-stamps inside the kernel, i.e, a module, then you can call the kernel's do_gettimeofday() function.
Cheers, Dick Johnson Penguin : Linux version 2.4.22 on an i686 machine (797.90 BogoMips). Note 96.31% of all statistics are fiction.
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