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Diffstat (limited to 'vendor/bytemuck/src/zeroable.rs')
| -rw-r--r-- | vendor/bytemuck/src/zeroable.rs | 245 |
1 files changed, 0 insertions, 245 deletions
diff --git a/vendor/bytemuck/src/zeroable.rs b/vendor/bytemuck/src/zeroable.rs deleted file mode 100644 index b64a9bf..0000000 --- a/vendor/bytemuck/src/zeroable.rs +++ /dev/null @@ -1,245 +0,0 @@ -use super::*; - -/// Trait for types that can be safely created with -/// [`zeroed`](core::mem::zeroed). -/// -/// An all-zeroes value may or may not be the same value as the -/// [Default](core::default::Default) value of the type. -/// -/// ## Safety -/// -/// * Your type must be inhabited (eg: no -/// [Infallible](core::convert::Infallible)). -/// * Your type must be allowed to be an "all zeroes" bit pattern (eg: no -/// [`NonNull<T>`](core::ptr::NonNull)). -/// -/// ## Features -/// -/// Some `impl`s are feature gated due to the MSRV policy: -/// -/// * `MaybeUninit<T>` was not available in 1.34.0, but is available under the -/// `zeroable_maybe_uninit` feature flag. -/// * `Atomic*` types require Rust 1.60.0 or later to work on certain platforms, -/// but is available under the `zeroable_atomics` feature flag. -/// * `[T; N]` for arbitrary `N` requires the `min_const_generics` feature flag. -pub unsafe trait Zeroable: Sized { - /// Calls [`zeroed`](core::mem::zeroed). - /// - /// This is a trait method so that you can write `MyType::zeroed()` in your - /// code. It is a contract of this trait that if you implement it on your type - /// you **must not** override this method. - #[inline] - fn zeroed() -> Self { - unsafe { core::mem::zeroed() } - } -} -unsafe impl Zeroable for () {} -unsafe impl Zeroable for bool {} -unsafe impl Zeroable for char {} -unsafe impl Zeroable for u8 {} -unsafe impl Zeroable for i8 {} -unsafe impl Zeroable for u16 {} -unsafe impl Zeroable for i16 {} -unsafe impl Zeroable for u32 {} -unsafe impl Zeroable for i32 {} -unsafe impl Zeroable for u64 {} -unsafe impl Zeroable for i64 {} -unsafe impl Zeroable for usize {} -unsafe impl Zeroable for isize {} -unsafe impl Zeroable for u128 {} -unsafe impl Zeroable for i128 {} -unsafe impl Zeroable for f32 {} -unsafe impl Zeroable for f64 {} -unsafe impl<T: Zeroable> Zeroable for Wrapping<T> {} -unsafe impl<T: Zeroable> Zeroable for core::cmp::Reverse<T> {} - -// Note: we can't implement this for all `T: ?Sized` types because it would -// create NULL pointers for vtables. -// Maybe one day this could be changed to be implemented for -// `T: ?Sized where <T as core::ptr::Pointee>::Metadata: Zeroable`. -unsafe impl<T> Zeroable for *mut T {} -unsafe impl<T> Zeroable for *const T {} -unsafe impl<T> Zeroable for *mut [T] {} -unsafe impl<T> Zeroable for *const [T] {} -unsafe impl Zeroable for *mut str {} -unsafe impl Zeroable for *const str {} - -unsafe impl<T: ?Sized> Zeroable for PhantomData<T> {} -unsafe impl Zeroable for PhantomPinned {} -unsafe impl<T: Zeroable> Zeroable for ManuallyDrop<T> {} -unsafe impl<T: Zeroable> Zeroable for core::cell::UnsafeCell<T> {} -unsafe impl<T: Zeroable> Zeroable for core::cell::Cell<T> {} - -#[cfg(feature = "zeroable_atomics")] -#[cfg_attr(feature = "nightly_docs", doc(cfg(feature = "zeroable_atomics")))] -mod atomic_impls { - use super::Zeroable; - - #[cfg(target_has_atomic = "8")] - unsafe impl Zeroable for core::sync::atomic::AtomicBool {} - #[cfg(target_has_atomic = "8")] - unsafe impl Zeroable for core::sync::atomic::AtomicU8 {} - #[cfg(target_has_atomic = "8")] - unsafe impl Zeroable for core::sync::atomic::AtomicI8 {} - - #[cfg(target_has_atomic = "16")] - unsafe impl Zeroable for core::sync::atomic::AtomicU16 {} - #[cfg(target_has_atomic = "16")] - unsafe impl Zeroable for core::sync::atomic::AtomicI16 {} - - #[cfg(target_has_atomic = "32")] - unsafe impl Zeroable for core::sync::atomic::AtomicU32 {} - #[cfg(target_has_atomic = "32")] - unsafe impl Zeroable for core::sync::atomic::AtomicI32 {} - - #[cfg(target_has_atomic = "64")] - unsafe impl Zeroable for core::sync::atomic::AtomicU64 {} - #[cfg(target_has_atomic = "64")] - unsafe impl Zeroable for core::sync::atomic::AtomicI64 {} - - #[cfg(target_has_atomic = "ptr")] - unsafe impl Zeroable for core::sync::atomic::AtomicUsize {} - #[cfg(target_has_atomic = "ptr")] - unsafe impl Zeroable for core::sync::atomic::AtomicIsize {} - - #[cfg(target_has_atomic = "ptr")] - unsafe impl<T> Zeroable for core::sync::atomic::AtomicPtr<T> {} -} - -#[cfg(feature = "zeroable_maybe_uninit")] -#[cfg_attr( - feature = "nightly_docs", - doc(cfg(feature = "zeroable_maybe_uninit")) -)] -unsafe impl<T> Zeroable for core::mem::MaybeUninit<T> {} - -unsafe impl<A: Zeroable> Zeroable for (A,) {} -unsafe impl<A: Zeroable, B: Zeroable> Zeroable for (A, B) {} -unsafe impl<A: Zeroable, B: Zeroable, C: Zeroable> Zeroable for (A, B, C) {} -unsafe impl<A: Zeroable, B: Zeroable, C: Zeroable, D: Zeroable> Zeroable - for (A, B, C, D) -{ -} -unsafe impl<A: Zeroable, B: Zeroable, C: Zeroable, D: Zeroable, E: Zeroable> - Zeroable for (A, B, C, D, E) -{ -} -unsafe impl< - A: Zeroable, - B: Zeroable, - C: Zeroable, - D: Zeroable, - E: Zeroable, - F: Zeroable, - > Zeroable for (A, B, C, D, E, F) -{ -} -unsafe impl< - A: Zeroable, - B: Zeroable, - C: Zeroable, - D: Zeroable, - E: Zeroable, - F: Zeroable, - G: Zeroable, - > Zeroable for (A, B, C, D, E, F, G) -{ -} -unsafe impl< - A: Zeroable, - B: Zeroable, - C: Zeroable, - D: Zeroable, - E: Zeroable, - F: Zeroable, - G: Zeroable, - H: Zeroable, - > Zeroable for (A, B, C, D, E, F, G, H) -{ -} - -#[cfg(feature = "min_const_generics")] -#[cfg_attr(feature = "nightly_docs", doc(cfg(feature = "min_const_generics")))] -unsafe impl<T, const N: usize> Zeroable for [T; N] where T: Zeroable {} - -#[cfg(not(feature = "min_const_generics"))] -impl_unsafe_marker_for_array!( - Zeroable, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, - 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 48, 64, 96, 128, 256, - 512, 1024, 2048, 4096 -); - -impl_unsafe_marker_for_simd!( - #[cfg(all(target_arch = "wasm32", feature = "wasm_simd"))] - unsafe impl Zeroable for wasm32::{v128} -); - -impl_unsafe_marker_for_simd!( - #[cfg(all(target_arch = "aarch64", feature = "aarch64_simd"))] - unsafe impl Zeroable for aarch64::{ - float32x2_t, float32x2x2_t, float32x2x3_t, float32x2x4_t, float32x4_t, - float32x4x2_t, float32x4x3_t, float32x4x4_t, float64x1_t, float64x1x2_t, - float64x1x3_t, float64x1x4_t, float64x2_t, float64x2x2_t, float64x2x3_t, - float64x2x4_t, int16x4_t, int16x4x2_t, int16x4x3_t, int16x4x4_t, int16x8_t, - int16x8x2_t, int16x8x3_t, int16x8x4_t, int32x2_t, int32x2x2_t, int32x2x3_t, - int32x2x4_t, int32x4_t, int32x4x2_t, int32x4x3_t, int32x4x4_t, int64x1_t, - int64x1x2_t, int64x1x3_t, int64x1x4_t, int64x2_t, int64x2x2_t, int64x2x3_t, - int64x2x4_t, int8x16_t, int8x16x2_t, int8x16x3_t, int8x16x4_t, int8x8_t, - int8x8x2_t, int8x8x3_t, int8x8x4_t, poly16x4_t, poly16x4x2_t, poly16x4x3_t, - poly16x4x4_t, poly16x8_t, poly16x8x2_t, poly16x8x3_t, poly16x8x4_t, - poly64x1_t, poly64x1x2_t, poly64x1x3_t, poly64x1x4_t, poly64x2_t, - poly64x2x2_t, poly64x2x3_t, poly64x2x4_t, poly8x16_t, poly8x16x2_t, - poly8x16x3_t, poly8x16x4_t, poly8x8_t, poly8x8x2_t, poly8x8x3_t, poly8x8x4_t, - uint16x4_t, uint16x4x2_t, uint16x4x3_t, uint16x4x4_t, uint16x8_t, - uint16x8x2_t, uint16x8x3_t, uint16x8x4_t, uint32x2_t, uint32x2x2_t, - uint32x2x3_t, uint32x2x4_t, uint32x4_t, uint32x4x2_t, uint32x4x3_t, - uint32x4x4_t, uint64x1_t, uint64x1x2_t, uint64x1x3_t, uint64x1x4_t, - uint64x2_t, uint64x2x2_t, uint64x2x3_t, uint64x2x4_t, uint8x16_t, - uint8x16x2_t, uint8x16x3_t, uint8x16x4_t, uint8x8_t, uint8x8x2_t, - uint8x8x3_t, uint8x8x4_t, - } -); - -impl_unsafe_marker_for_simd!( - #[cfg(target_arch = "x86")] - unsafe impl Zeroable for x86::{ - __m128i, __m128, __m128d, - __m256i, __m256, __m256d, - } -); - -impl_unsafe_marker_for_simd!( - #[cfg(target_arch = "x86_64")] - unsafe impl Zeroable for x86_64::{ - __m128i, __m128, __m128d, - __m256i, __m256, __m256d, - } -); - -#[cfg(feature = "nightly_portable_simd")] -#[cfg_attr( - feature = "nightly_docs", - doc(cfg(feature = "nightly_portable_simd")) -)] -unsafe impl<T, const N: usize> Zeroable for core::simd::Simd<T, N> -where - T: core::simd::SimdElement + Zeroable, - core::simd::LaneCount<N>: core::simd::SupportedLaneCount, -{ -} - -impl_unsafe_marker_for_simd!( - #[cfg(all(target_arch = "x86", feature = "nightly_stdsimd"))] - unsafe impl Zeroable for x86::{ - __m128bh, __m256bh, __m512, - __m512bh, __m512d, __m512i, - } -); - -impl_unsafe_marker_for_simd!( - #[cfg(all(target_arch = "x86_64", feature = "nightly_stdsimd"))] - unsafe impl Zeroable for x86_64::{ - __m128bh, __m256bh, __m512, - __m512bh, __m512d, __m512i, - } -); 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