Unix signals itimer install#

Maybe that's just part of the learning curve. Looks like setitimer is not available with my version of python but how can I tell from the error message? Shouldn't it be saying the module has no method? Calling the missing method an attribute is pretty confusing. So I have to believe it is titmer itself that is having issues.Īha! I just figured out the problem by trying this on a VM with a newer version of python and it works just fine.

Is it complaining that it can't find titimer OR is there something wrong with the attributes I'm passing? I was wondering if it couldn't resolve signal.ITIMER_REAL and so tried calling it with a 0 just to see what would happen and now it's telling me: python]#. include int getitimer (int which, struct itimerval value) int setitimer (int which, const struct itimerval value, struct itimerval ovalue) DESCRIPTION The system provides each process with three interval timers, each decrementing in a distinct time domain.

Perhaps part my the problem is that as a new python user I'm still not 'one with python' and perhaps am not understanding what the error message it trying to tell me. titimer(signal.ITIMER_REAL, 2, 2)ĪttributeError: 'module' object has no attribute 'setitimer' But when I make an exact copy of that example, I get this: python]#. In fact, according to this - python timer mystery it looks pretty easy to use. My second question has to do with setitimer, which according to the docs says it will deliver alarms and the time can be specified as a floating point number. The only thing is when I do this all I get as 2 significant digits and am wondering if I need to import something else or set something in my environment or what. I did find answers this questions elsewhere to use using time.time() in python. I'm trying to get the current time as a high resolution number, something easily done with the Time::HiRes module in perl. int which, / ITIMERREAL, ITIMERVIRTUAL, ITIMERPROF / const struct itimerval value, struct itimerval ovalue) Example struct itimerval timer.

Unix signals itimer install#

A process may request a signal from the operating system when a timer. Each Unix process has a signal mask in the kernel oOS use this mask to decide which signals to deliver osigprocmask()takes a user-defined mask install it in the.

This is a 2-part question and the first part is simple. The UNIX operating system uses signals as a means of notifying a process that some.