From: David McFarland <corngood@gmail.com>
To: cygwin-developers@cygwin.com
Subject: Re: Re: Fibers and cygtls
Date: Fri, 04 Sep 2020 23:46:16 -0300 [thread overview]
Message-ID: <vritzh657xfr.fsf@gmail.com> (raw)
In-Reply-To: <20200904195143.GY4127@calimero.vinschen.de>
> Bottom line is, before trying to use Windows fibers, or before letting
> boost use Windows functions on Cygwin (sigh), check what other POSIX or
> BSD systems provide to implement coroutines. If there's an API, let's
> implement this API in Cygwin and then use that from user space.
boost-context doesn't actually use Windows fibers by default. Its fiber
implementation (fcontext) uses user-provided buffers for fiber stacks.
The jump implementation is in:
https://github.com/boostorg/context/blob/develop/src/asm/jump_x86_64_ms_pe_gas.asm
On Linux I believe uses its own asm implementation without any kernel
interaction:
https://github.com/boostorg/context/blob/develop/src/asm/jump_x86_64_sysv_elf_gas.S
There's also an implementation (ucontext) using makecontext, which may
be the best option. I'll try that next.
The implementations are compared here:
https://www.boost.org/doc/libs/1_74_0/libs/context/doc/html/context/cc/implementations__fcontext_t__ucontext_t_and_winfiber.html
next prev parent reply other threads:[~2020-09-05 2:46 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-04 15:13 David McFarland
2020-09-04 19:51 ` Corinna Vinschen
2020-09-05 2:46 ` David McFarland [this message]
2021-12-20 15:01 ` David McFarland
2021-12-22 15:46 ` David McFarland
2020-09-06 14:19 ` Jon Turney
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=vritzh657xfr.fsf@gmail.com \
--to=corngood@gmail.com \
--cc=cygwin-developers@cygwin.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).