Re: USE_SIGCHLD

On Sat, Jun 07, 2008 at 19:08:31 -0400, Rocco Caputo wrote:
> In other words, it eliminates that up-to-1-second wait for child  
> processes that always annoyed you.  Without resorting to a faster,  
> less efficient polling interval. :)

HAI!

> Yuval: Reviewing the code, it looks like the SIGCHLD handler may be  
> triggered multiple times before the EN_SCPOLL event could be  
> dispatched.  That would enqueue redundant EN_SCPOLL events, and it  
> could be marginally unoptimal.

> Would it be feasible to disable the SIG$_[0] handler from the handler  
> and then re-enable it just before the children are reaped?  Something  
> like this:

I thought that would actually be less efficient, since setting and
unsetting signal handlers has a pretty high overhead.

I suppose some flag could be set, that would probably be faster than
removing and readding the signal handler

-- 
  Yuval Kogman <[email protected]>
http://nothingmuch.woobling.org  0xEBD27418