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Support atomic CAS on BPF targets #29

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taiki-e opened this issue Aug 9, 2022 · 3 comments · May be fixed by #78
Open

Support atomic CAS on BPF targets #29

taiki-e opened this issue Aug 9, 2022 · 3 comments · May be fixed by #78
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C-enhancement Category: A new feature or an improvement for an existing one O-bpf Target: BPF

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taiki-e commented Aug 9, 2022 •
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Another target that doesn't support atomic CAS in the standard library.

portable-atomic/tools/build.sh

Line 199 in d547b60

bpf*) ;; # TODO

This LLVM test indicates that many of the 64-bit and 32-bit atomic operations are already supported.

Refs: https://www.kernel.org/doc/html/latest/bpf/instruction-set.html#atomic-operations
@taiki-e taiki-e added C-enhancement Category: A new feature or an improvement for an existing one help wanted Extra attention is needed O-bpf Target: BPF labels Aug 9, 2022
@taiki-e taiki-e mentioned this issue Sep 24, 2022
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taiki-e commented Dec 18, 2022

This will be resolved by rust-lang/rust#105708.

@taiki-e taiki-e removed the help wanted Extra attention is needed label Dec 21, 2022
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taiki-e commented Jan 10, 2023

rust-lang/rust#105708 merged.

@taiki-e taiki-e closed this as completed Jan 10, 2023
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taiki-e commented Jan 22, 2023

rust-lang/rust#105708 is not actually working properly.

@taiki-e taiki-e reopened this Jan 22, 2023
@taiki-e taiki-e linked a pull request Feb 23, 2023 that will close this issue
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C-enhancement Category: A new feature or an improvement for an existing one O-bpf Target: BPF
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bpf: Support atomic CAS taiki-e/portable-atomic
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