On Sun, May 27, 2018 at 10:03:32PM -0700, Daniel Austin <daniel.r.aus...@gmail.com> wrote: > Hi. What is the proper mechanism to trigger an event in a separate > process, not a separate thread, assuming a modern Linux kernel? > > 1) Use ev_io on an eventfd file descriptor. Use normal eventfd file
That, or a pipe, are the most reasonable options. Which one is faster depends very much on the application. > "register" with the triggering process, but they do need to get access to > the file description number somehow (e.g. shared memory or other means). The fd number is useless in another process - you cna pass file descriptions to other pĆ¼rocesses with file descriptor passing via a unix domain socket, though, or inheriting using fork for example. > 2) Use ev_async. I think the proper usage here would be to put the ev_async cannot be used for this purpose. > 3) Something else? Use inotify to watch for file changes. There are some other mechanisms, but for general event handling, you want a pipe or something like eventfd. -- The choice of a Deliantra, the free code+content MORPG -----==- _GNU_ http://www.deliantra.net ----==-- _ generation ---==---(_)__ __ ____ __ Marc Lehmann --==---/ / _ \/ // /\ \/ / schm...@schmorp.de -=====/_/_//_/\_,_/ /_/\_\ _______________________________________________ libev mailing list libev@lists.schmorp.de http://lists.schmorp.de/mailman/listinfo/libev