Le mar. 27 avr. 2021 à 22:51, Ben Pfaff <b...@cs.stanford.edu> a écrit : > > On Tue, Apr 27, 2021 at 3:47 PM Bastien ROUCARIES > <roucaries.bast...@gmail.com> wrote: > > > > Le mar. 27 avr. 2021 à 22:40, Bruno Haible <br...@clisp.org> a écrit : > > > > > > Hi Bastien, > > > > > > > I want to assess the safety and portability of the following trick, > > > > > > I would want to help you with this, but I can't. You have not stated: > > > - What is this code supposed to do? > > I want to shutdown (2) a pipe, in a multithread application, in order > > to get out a poll(2) wait state > > > - Why is it a "trick"? What advantages does it have compared to the code > > > a naïve developer would write? > > The naive delevopper will: > > - close the end of the pipe, but it does not break poll(2), and > > moreover in multithread context > > it is not safe due to fd reuse > > -use timeout but in this case why use poll... > > > > The goal is also to shutdown an eventfd but without kernel support, I > > suppose it is not possible... > > Can you use socketpair() instead of pipe()? Yes I can but socket are bidirectionnal and cost more about memory/speed than pipe.
Bastien
