Maxime Devos <maximede...@telenet.be> writes: > [[PGP Signed Part:Undecided]] > Christine Lemmer-Webber schreef op wo 08-09-2021 om 12:18 [-0400]: >> Maxime Devos <maximede...@telenet.be> writes: >> >> > [[PGP Signed Part:Undecided]] >> > Maxime Devos schreef op zo 20-06-2021 om 17:01 [+0200]: >> > > Christopher Lemmer Webber schreef op di 18-05-2021 om 11:46 [-0400]: >> > > > Hello, >> > > > >> > > > I'm finally taking some time to port Goblins to Guile, in-between other >> > > > tasks anyway. In Goblins there is a weak hashtable that maps current >> > > > actor references to their current behavior. I found that for >> > > > self-referential actors, I needed ephemerons for GC stuff to work >> > > > right. >> > > >> > > [bla bla on how this could be implemented in Guile] >> > >> > This doesn't work because there is nothing preventing the >> > 'value' from being freed. Trying to fix that now, using >> > the example implementation of "weak maps" in libgc. >> > >> > Greetings, >> > Maxime. >> >> I fell off the radar on replying to this, but did path turn out to work? > > The example implementation was a bit complicated and not well-documented. > The ‘disclaimer’ support is disabled by default, a configuration flag > needs to be set while compiling libgc to use disclaimers. Guix (the distro I > use) doesn't set it. I needed to be careful in libguile/weak-table.c to not > protect too much (otherwise it wouldn't be an ephemeral weak hash table) or > too little (otherwise ‘freed’ objects would be re-used). > > I think it can be made to work, but I didn't succeed, and moved on to other > things. If someone would like to implement this, I would recommend starting > with something like ‘ephemeral pairs’ before moving to ephemeral hash tables. > > Greetings, > Maxime.
Okay... thank you for the work you put into it! :)
