Re: Manipulating C code at the AST level, in C

From	Paul Rubin <no.email@nospam.invalid>
Newsgroups	comp.lang.lisp, comp.lang.c
Subject	Re: Manipulating C code at the AST level, in C
Date	2026-08-10 01:11 -0700
Organization	A noiseless patient Spider
Message-ID	<87jypyqtt4.fsf@nightsong.com> (permalink)
References	(16 earlier) <87bjbn2nhs.fsf@safunu.org> <ee5bS.4431$la89.3295@fx06.ams4> <877bm4zgsp.fsf@safunu.org> <1150b48$3blde$3@dont-email.me> <EgNdS.164899$4Fu9.91217@fx05.ams4>

Cross-posted to 2 groups.

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Johann 'Myrkraverk' Oskarsson <johann@myrkraverk.invalid> writes:
> I admit I'm not sure why the select system call seems to be missing from
> this selection of networking functions, so I'm impelled to ask, what is
> is that you use select for, in Python?

Select is used to listening to a bunch of file descriptors
simultaneously and unblocking as soon as data becomes available on one
or more of the fd's.  These days it's somewhat superseded by epoll or
io_uring or a few other alternatives.

I actually don't see any of these in the sbcl manual, though maybe I
didn't look hard enough.  I'd expect to see it in the streams or
concurrency modules.  You could use threads and mailboxes instead, but
that's often overkill, especially with posix threads.

I see a mention of:

   *Recursive Event Loop*: SBCL provides a recursive event loop
   (serve-event) for doing non-blocking IO on multiple streams without
   using threads.

But I don't see anything more about that in the manual.  There's a
reddit thread saying it's poorly supported:

https://old.reddit.com/r/Common_Lisp/comments/kdk6mq/how_to_use_serveevent_from_sbcl/

Anyway that is basically what select is for.

Thread

Re: Resources to learn common lisp? Johann 'Myrkraverk' Oskarsson <johann@myrkraverk.invalid> - 2026-07-31 07:17 +0800
  Re: Resources to learn common lisp? Anton Antimo <anton@safunu.org> - 2026-07-31 12:21 -0300
    Re: Resources to learn common lisp? Johann 'Myrkraverk' Oskarsson <johann@myrkraverk.invalid> - 2026-08-01 01:48 +0800
      Re: Resources to learn common lisp? Anton Antimo <anton@safunu.org> - 2026-08-05 13:13 -0300
        Re: Resources to learn common lisp? Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-08-05 21:48 +0000
          Re: Resources to learn common lisp? David Brown <david.brown@hesbynett.no> - 2026-08-06 09:05 +0200
          Manipulating C code at the AST level, in C (was: Re: Resources to learn common lisp?) Johann 'Myrkraverk' Oskarsson <johann@myrkraverk.invalid> - 2026-08-09 05:33 +0800
            Re: Manipulating C code at the AST level, in C Paul Rubin <no.email@nospam.invalid> - 2026-08-10 01:11 -0700
              Re: Manipulating C code at the AST level, in C "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2026-08-10 13:10 -0700
            Re: Manipulating C code at the AST level, in C Anton Antimo <anton@safunu.org> - 2026-08-10 17:41 -0300
              Re: Manipulating C code at the AST level, in C Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-08-10 23:53 +0000
                Re: Manipulating C code at the AST level, in C scott@slp53.sl.home (Scott Lurndal) - 2026-08-11 14:29 +0000
                kqueues and port_create() (was: Re: Manipulating C code at the AST level, in C) Johann 'Myrkraverk' Oskarsson <johann@myrkraverk.invalid> - 2026-08-12 07:51 +0800
                Re: kqueues and port_create() Paul Rubin <no.email@nospam.invalid> - 2026-08-11 20:59 -0700
                Re: kqueues and port_create() Johann 'Myrkraverk' Oskarsson <johann@myrkraverk.invalid> - 2026-08-12 13:07 +0800
                Re: kqueues and port_create() Alan Bawden <alan@csail.mit.edu> - 2026-08-12 03:23 -0400
                Re: kqueues and port_create() Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-08-12 07:50 +0000
                Re: kqueues and port_create() Johann 'Myrkraverk' Oskarsson <johann@myrkraverk.invalid> - 2026-08-13 11:33 +0800
                Re: kqueues and port_create() Paul Rubin <no.email@nospam.invalid> - 2026-08-12 02:22 -0700
                Re: kqueues and port_create() Alan Bawden <alan@csail.mit.edu> - 2026-08-12 20:55 -0400
                Re: kqueues and port_create() Johann 'Myrkraverk' Oskarsson <johann@myrkraverk.invalid> - 2026-08-13 11:37 +0800
                Re: kqueues and port_create() "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2026-08-12 12:59 -0700
                Re: Manipulating C code at the AST level, in C Nuno Silva <nunojsilva@invalid.invalid> - 2026-08-14 12:26 +0100
              D.N.S. in Common Lisp (was: Re: Manipulating C code at the AST level, in C) Johann 'Myrkraverk' Oskarsson <johann@myrkraverk.invalid> - 2026-08-12 07:59 +0800
                Re: D.N.S. in Common Lisp Anton Antimo <anton@safunu.org> - 2026-08-12 09:01 -0300
        Re: Resources to learn common lisp? Johann 'Myrkraverk' Oskarsson <johann@myrkraverk.invalid> - 2026-08-12 13:18 +0800
          Re: Resources to learn common lisp? bixbox <noreply@example.invalid> - 2026-08-12 10:16 +0200
            Re: Resources to learn common lisp? Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-08-13 02:18 +0000
              Re: Resources to learn common lisp? Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2026-08-13 04:56 +0200
                Re: Resources to learn common lisp? "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2026-08-12 21:13 -0700
                Re: Resources to learn common lisp? Anton Antimo <anton@safunu.org> - 2026-08-13 12:25 -0300
                Re: Resources to learn common lisp? Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2026-08-13 19:01 +0200
                Re: Resources to learn common lisp? "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2026-08-13 14:50 -0700
                Re: Resources to learn common lisp? Anton Antimo <anton@safunu.org> - 2026-08-14 08:27 -0300
                Re: Resources to learn common lisp? Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-08-15 03:18 +0000
                Re: Resources to learn common lisp? Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-08-14 02:47 +0000
                Re: Resources to learn common lisp? cross@spitfire.i.gajendra.net (Dan Cross) - 2026-08-14 12:20 +0000
                Re: Resources to learn common lisp? Anton Antimo <anton@safunu.org> - 2026-08-16 15:37 -0300
                Re: Resources to learn common lisp? cross@spitfire.i.gajendra.net (Dan Cross) - 2026-08-14 12:17 +0000
                Re: Resources to learn common lisp? Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2026-08-14 16:31 +0200
              Re: Resources to learn common lisp? Johann 'Myrkraverk' Oskarsson <johann@myrkraverk.invalid> - 2026-08-13 11:29 +0800
              Re: Resources to learn common lisp? Michael S <already5chosen@yahoo.com> - 2026-08-14 15:30 +0300
                Re: Resources to learn common lisp? Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2026-08-14 16:45 +0200
                Re: Resources to learn common lisp? David Brown <david.brown@hesbynett.no> - 2026-08-14 17:15 +0200
                Re: Resources to learn common lisp? Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2026-08-14 19:51 +0200
                Re: Resources to learn common lisp? Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2026-08-14 12:05 -0700
    Re: Resources to learn common lisp? Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-07-31 22:46 +0000
      Re: Resources to learn common lisp? Johann 'Myrkraverk' Oskarsson <johann@myrkraverk.invalid> - 2026-08-01 07:38 +0800
        Re: Resources to learn common lisp? steve g <Sgonedes1977@gmail.com> - 2026-08-04 22:26 -0400
      Re: Resources to learn common lisp? tfb <tfb@work.it.out> - 2026-08-01 09:08 +0000
        Re: Resources to learn common lisp? Paul <nospam@needed.invalid> - 2026-08-01 07:49 -0400
          Re: Resources to learn common lisp? Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-08-01 23:37 +0000
            Re: Resources to learn common lisp? "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2026-08-01 16:54 -0700
          Re: Resources to learn common lisp? tfb <tfb@work.it.out> - 2026-08-02 07:39 +0000
        Re: Resources to learn common lisp? steve g <Sgonedes1977@gmail.com> - 2026-08-04 22:39 -0400
    Re: Resources to learn common lisp? steve g <Sgonedes1977@gmail.com> - 2026-07-31 23:59 -0400
      Re: Resources to learn common lisp? Johann 'Myrkraverk' Oskarsson <johann@myrkraverk.invalid> - 2026-08-01 16:12 +0800
        Re: Resources to learn common lisp? steve g <Sgonedes1977@gmail.com> - 2026-08-04 22:50 -0400
          Re: Resources to learn common lisp? Johann 'Myrkraverk' Oskarsson <johann@myrkraverk.invalid> - 2026-08-05 19:02 +0800
            Re: Resources to learn common lisp? steve g <Sgonedes1977@gmail.com> - 2026-08-06 19:36 -0400
              Re: Resources to learn common lisp? Johann 'Myrkraverk' Oskarsson <johann@myrkraverk.invalid> - 2026-08-09 02:11 +0800
                Re: Resources to learn common lisp? steve g <Sgonedes1977@gmail.com> - 2026-08-09 18:49 -0400
                Re: Resources to learn common lisp? "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2026-08-10 13:08 -0700

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