Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.python > #97951

Re: select.poll and ppoll

Show all headers | View raw

Steven D'Aprano <steve+comp.lang.python@pearwood.info>:

> On Thursday 22 October 2015 22:18, Marko Rauhamaa wrote:
>> The standard, classic way to solve the race condition is to replace
>> the "signaled" flag with an internal pipe. The signal handler writes
>> a byte into the pipe and select.poll() wakes up when the pipe becomes
>> readable. IOW, ppoll() and pselect() are not needed.
>
> [...]
>
> I will discuss with my colleague and see if this solves his problem.

Note also that "newer" Linux kernels (2.6.25 and up) have a file
descriptor type, signalfd, that simplifies the idiom slightly.


Marko

Back to comp.lang.python | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

select.poll and ppoll Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-10-22 16:38 +1100
  Re: select.poll and ppoll Paul Rubin <no.email@nospam.invalid> - 2015-10-22 00:30 -0700
  Re: select.poll and ppoll Laura Creighton <lac@openend.se> - 2015-10-22 11:07 +0200
  Re: select.poll and ppoll Marko Rauhamaa <marko@pacujo.net> - 2015-10-22 14:18 +0300
    Re: select.poll and ppoll Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-10-25 22:30 +1100
      Re: select.poll and ppoll Marko Rauhamaa <marko@pacujo.net> - 2015-10-25 21:21 +0200
        Re: select.poll and ppoll Marko Rauhamaa <marko@pacujo.net> - 2015-10-25 21:23 +0200

csiph-web