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authorValentin Popov <valentin@popov.link>2024-07-19 15:37:58 +0300
committerValentin Popov <valentin@popov.link>2024-07-19 15:37:58 +0300
commita990de90fe41456a23e58bd087d2f107d321f3a1 (patch)
tree15afc392522a9e85dc3332235e311b7d39352ea9 /vendor/portable-atomic/src/imp/atomic128/detect/aarch64_fuchsia.rs
parent3d48cd3f81164bbfc1a755dc1d4a9a02f98c8ddd (diff)
downloadfparkan-a990de90fe41456a23e58bd087d2f107d321f3a1.tar.xz
fparkan-a990de90fe41456a23e58bd087d2f107d321f3a1.zip
Deleted vendor folder
Diffstat (limited to 'vendor/portable-atomic/src/imp/atomic128/detect/aarch64_fuchsia.rs')
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diff --git a/vendor/portable-atomic/src/imp/atomic128/detect/aarch64_fuchsia.rs b/vendor/portable-atomic/src/imp/atomic128/detect/aarch64_fuchsia.rs
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-// SPDX-License-Identifier: Apache-2.0 OR MIT
-
-// Run-time feature detection on aarch64 Fuchsia by using zx_system_get_features.
-//
-// As of nightly-2023-01-23, is_aarch64_feature_detected doesn't support run-time detection on Fuchsia.
-// https://github.com/rust-lang/stdarch/blob/a0c30f3e3c75adcd6ee7efc94014ebcead61c507/crates/std_detect/src/detect/mod.rs
-//
-// Refs:
-// - https://fuchsia.dev/fuchsia-src/reference/syscalls/system_get_features
-// - https://github.com/llvm/llvm-project/commit/4e731abc55681751b5d736b613f7720e50eb1ad4
-
-include!("common.rs");
-
-#[allow(non_camel_case_types)]
-mod ffi {
- // https://fuchsia.googlesource.com/fuchsia/+/refs/heads/main/zircon/system/public/zircon/types.h
- pub(crate) type zx_status_t = i32;
-
- // https://fuchsia.googlesource.com/fuchsia/+/refs/heads/main/zircon/system/public/zircon/errors.h
- pub(crate) const ZX_OK: zx_status_t = 0;
- // https://fuchsia.googlesource.com/fuchsia/+/refs/heads/main/zircon/system/public/zircon/features.h
- pub(crate) const ZX_FEATURE_KIND_CPU: u32 = 0;
- pub(crate) const ZX_ARM64_FEATURE_ISA_ATOMICS: u32 = 1 << 8;
-
- #[link(name = "zircon")]
- extern "C" {
- // https://fuchsia.dev/fuchsia-src/reference/syscalls/system_get_features
- pub(crate) fn zx_system_get_features(kind: u32, features: *mut u32) -> zx_status_t;
- }
-}
-
-fn zx_system_get_features(kind: u32) -> u32 {
- let mut out = 0_u32;
- // SAFETY: the pointer is valid because we got it from a reference.
- let res = unsafe { ffi::zx_system_get_features(kind, &mut out) };
- if res != ffi::ZX_OK {
- return 0;
- }
- out
-}
-
-#[cold]
-fn _detect(info: &mut CpuInfo) {
- let features = zx_system_get_features(ffi::ZX_FEATURE_KIND_CPU);
- if features & ffi::ZX_ARM64_FEATURE_ISA_ATOMICS != 0 {
- info.set(CpuInfo::HAS_LSE);
- }
-}
-
-#[allow(
- clippy::alloc_instead_of_core,
- clippy::std_instead_of_alloc,
- clippy::std_instead_of_core,
- clippy::undocumented_unsafe_blocks,
- clippy::wildcard_imports
-)]
-#[cfg(test)]
-mod tests {
- use super::*;
-
- #[test]
- fn test_fuchsia() {
- let features = zx_system_get_features(ffi::ZX_FEATURE_KIND_CPU);
- assert_ne!(features, 0);
- std::eprintln!("features: {:b}", features);
- }
-
- // Static assertions for FFI bindings.
- // This checks that FFI bindings defined in this crate and FFI bindings
- // generated for the platform's latest header file using bindgen have
- // compatible signatures (or the same values if constants).
- // Since this is static assertion, we can detect problems with
- // `cargo check --tests --target <target>` run in CI (via TESTS=1 build.sh)
- // without actually running tests on these platforms.
- // See also tools/codegen/src/ffi.rs.
- // TODO(codegen): auto-generate this test
- #[allow(
- clippy::cast_possible_wrap,
- clippy::cast_sign_loss,
- clippy::cast_possible_truncation,
- clippy::no_effect_underscore_binding
- )]
- const _: fn() = || {
- use test_helper::sys;
- // TODO(codegen): zx_system_get_features
- let _: ffi::zx_status_t = 0 as sys::zx_status_t;
- static_assert!(ffi::ZX_OK == sys::ZX_OK as ffi::zx_status_t);
- static_assert!(ffi::ZX_FEATURE_KIND_CPU == sys::ZX_FEATURE_KIND_CPU);
- static_assert!(ffi::ZX_ARM64_FEATURE_ISA_ATOMICS == sys::ZX_ARM64_FEATURE_ISA_ATOMICS);
- };
-}