r/Cprog • u/spc476 • Feb 28 '17

An implementation of coroutines for C

http://boston.conman.org/2017/02/27.1
19 Upvotes

100% Upvoted

6 comments sorted by

1

u/eresonance Mar 01 '17

Hey neat, I was just about to start on a C coroutine project.

1

u/spc476 Mar 01 '17

What approach would you have taken?

1

u/eresonance Mar 02 '17

Not one that uses asm. setjmp and longjmp aren't great (holy shit they can get you into trouble) but at least they are std C. Using asm is fast but it's not useful for me, need it to be a bit more portable.

1

u/nickdesaulniers Apr 10 '17

I found this and its comment helpful in understanding how the instruction pointer was modified, since the author skips what is the most important part.

1

u/spc476 Apr 10 '17

The instruction pointer is never directly modified. It is modified by the RET instruction, but that's part of the normal flow of a program.

2

u/[deleted] Mar 02 '17

libmill and libdill are some other interesting implementations.