dev call 20231005

Dev Call: 14 September 2023

Present

Stepan, Florian, Matti,

Agenda

• HPy Meetup / CPython core dev sprint in Brno
• HPy 0.9 released 🥳

CPython core dev sprint C API summit

• Ideas for C API summit pres:
• present (detailed) handles contract (HPy_Dup, HPy_Close, lifetime of handles, HPy_Is)
• show how is that contract implemented on CPython (HPy_Dup -> Py_INCREF, etc.)
• still: debug mode checks the full contract
• handles allow boxing (MicroPython also does boxing)
• handles would work well with WebAssembly GC (MicroPython also uses tracing GC and its API exposes handles)
• no-GIL: handles (and their lifetime tied to single Python->C call) allow "single threaded" reference counting, could that be useful?
• API vs. ABI: you can have ABI stabililty and back
• context arg allows specializations (profiling in upcalls; specialized upcall functions)