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max0x7ba / atomic_queue

C++ lockless queue.
MIT License
1.47k stars 176 forks source link

[PATCH] Update RISC-V support to use real pause #43

Closed XieJiSS closed 2 years ago

XieJiSS commented 2 years ago

See also:

rust-lang/stdarch: https://github.com/rust-lang/stdarch/blob/7a41576c3f540ea96f70e6117e7ac3218c9b4367/crates/core_arch/src/riscv_shared/mod.rs#L10-L12

Explanation of pause, fence w,0 and .insn: https://blog.jiejiss.com/Rust-is-incompatible-with-LLVM-at-least-partially/#pause-fence-and-.insn

Note that this compiles on gcc 11.2.0 but not clang 13.0.1, and will compile on clang 14.0.0 (related commit: https://github.com/llvm/llvm-project/commit/283879793dc787225992496587581ec77b6b0610, tested on clang 14.0.0-rc1)

max0x7ba commented 2 years ago

Thank you for your contribution.