Reference implementation for proposed extensions to standard C signals handling

(C) 2024 Niall Douglas http://www.nedproductions.biz/

CI:

Can be configured to be a standard library implementation for your standard C library runtime. Licensed permissively.

Example of use

todo

Supported targets

This library should work well on any POSIX implementation, as well as Microsoft Windows. You will need a minimum of C 11 in your toolchain. Every architecture supporting C 11 atomics should work.

Current CI test targets:

• Ubuntu Linux, x64.
• Mac OS, AArch64.
• Microsoft Windows, x64.

Todo

https://maskray.me/blog/2021-02-14-all-about-thread-local-storage#initial-exec-tls-model-executable-preemptible will tell you everything there is to know about how TLS is implemented

• Add option to have the signal handling TLS marked __attribute((tls_model("initial-exec"))). This makes codegen async signal safe e.g. https://godbolt.org/z/a78sr4Mrc. NOTE that this would break use of this library from within a runtime loaded shared object! So document this loudly!

• Benchmark everything so can quote perf in WG14 paper.