Deleted vendor folder

1 files changed, 0 insertions, 412 deletions

diff --git a/vendor/portable-atomic/src/imp/fallback/mod.rs b/vendor/portable-atomic/src/imp/fallback/mod.rs
deleted file mode 100644
index 283c98c..0000000
--- a/vendor/portable-atomic/src/imp/fallback/mod.rs
+++ /dev/null
@@ -1,412 +0,0 @@
-// SPDX-License-Identifier: Apache-2.0 OR MIT
-
-// Fallback implementation using global locks.
-//
-// This implementation uses seqlock for global locks.
-//
-// This is basically based on global locks in crossbeam-utils's `AtomicCell`,
-// but seqlock is implemented in a way that does not depend on UB
-// (see comments in optimistic_read method in atomic! macro for details).
-//
-// Note that we cannot use a lock per atomic type, since the in-memory representation of the atomic
-// type and the value type must be the same.
-
-#![cfg_attr(
-    any(
-        all(
-            target_arch = "x86_64",
-            not(portable_atomic_no_cmpxchg16b_target_feature),
-            not(portable_atomic_no_outline_atomics),
-            not(any(target_env = "sgx", miri)),
-        ),
-        all(
-            target_arch = "powerpc64",
-            feature = "fallback",
-            not(portable_atomic_no_outline_atomics),
-            portable_atomic_outline_atomics, // TODO(powerpc64): currently disabled by default
-            any(
-                all(
-                    target_os = "linux",
-                    any(
-                        target_env = "gnu",
-                        all(
-                            any(target_env = "musl", target_env = "ohos"),
-                            not(target_feature = "crt-static"),
-                        ),
-                        portable_atomic_outline_atomics,
-                    ),
-                ),
-                target_os = "android",
-                target_os = "freebsd",
-            ),
-            not(any(miri, portable_atomic_sanitize_thread)),
-        ),
-        all(
-            target_arch = "arm",
-            not(portable_atomic_no_asm),
-            any(target_os = "linux", target_os = "android"),
-            not(portable_atomic_no_outline_atomics),
-        ),
-    ),
-    allow(dead_code)
-)]
-
-#[macro_use]
-pub(crate) mod utils;
-
-// Use "wide" sequence lock if the pointer width <= 32 for preventing its counter against wrap
-// around.
-//
-// In narrow architectures (pointer width <= 16), the counter is still <= 32-bit and may be
-// vulnerable to wrap around. But it's mostly okay, since in such a primitive hardware, the
-// counter will not be increased that fast.
-//
-// Some 64-bit architectures have ABI with 32-bit pointer width (e.g., x86_64 X32 ABI,
-// aarch64 ILP32 ABI, mips64 N32 ABI). On those targets, AtomicU64 is available and fast,
-// so use it to implement normal sequence lock.
-cfg_has_fast_atomic_64! {
-    mod seq_lock;
-}
-cfg_no_fast_atomic_64! {
-    #[path = "seq_lock_wide.rs"]
-    mod seq_lock;
-}
-
-use core::{cell::UnsafeCell, mem, sync::atomic::Ordering};
-
-use seq_lock::{SeqLock, SeqLockWriteGuard};
-use utils::CachePadded;
-
-// Some 64-bit architectures have ABI with 32-bit pointer width (e.g., x86_64 X32 ABI,
-// aarch64 ILP32 ABI, mips64 N32 ABI). On those targets, AtomicU64 is fast,
-// so use it to reduce chunks of byte-wise atomic memcpy.
-use seq_lock::{AtomicChunk, Chunk};
-
-// Adapted from https://github.com/crossbeam-rs/crossbeam/blob/crossbeam-utils-0.8.7/crossbeam-utils/src/atomic/atomic_cell.rs#L969-L1016.
-#[inline]
-#[must_use]
-fn lock(addr: usize) -> &'static SeqLock {
-    // The number of locks is a prime number because we want to make sure `addr % LEN` gets
-    // dispersed across all locks.
-    //
-    // crossbeam-utils 0.8.7 uses 97 here but does not use CachePadded,
-    // so the actual concurrency level will be smaller.
-    const LEN: usize = 67;
-    #[allow(clippy::declare_interior_mutable_const)]
-    const L: CachePadded<SeqLock> = CachePadded::new(SeqLock::new());
-    static LOCKS: [CachePadded<SeqLock>; LEN] = [
-        L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L,
-        L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L,
-        L, L, L, L, L, L, L,
-    ];
-
-    // If the modulus is a constant number, the compiler will use crazy math to transform this into
-    // a sequence of cheap arithmetic operations rather than using the slow modulo instruction.
-    &LOCKS[addr % LEN]
-}
-
-macro_rules! atomic {
-    ($atomic_type:ident, $int_type:ident, $align:literal) => {
-        #[repr(C, align($align))]
-        pub(crate) struct $atomic_type {
-            v: UnsafeCell<$int_type>,
-        }
-
-        impl $atomic_type {
-            const LEN: usize = mem::size_of::<$int_type>() / mem::size_of::<Chunk>();
-
-            #[inline]
-            unsafe fn chunks(&self) -> &[AtomicChunk; Self::LEN] {
-                static_assert!($atomic_type::LEN > 1);
-                static_assert!(mem::size_of::<$int_type>() % mem::size_of::<Chunk>() == 0);
-
-                // SAFETY: the caller must uphold the safety contract for `chunks`.
-                unsafe { &*(self.v.get() as *const $int_type as *const [AtomicChunk; Self::LEN]) }
-            }
-
-            #[inline]
-            fn optimistic_read(&self) -> $int_type {
-                // Using `MaybeUninit<[usize; Self::LEN]>` here doesn't change codegen: https://godbolt.org/z/86f8s733M
-                let mut dst: [Chunk; Self::LEN] = [0; Self::LEN];
-                // SAFETY:
-                // - There are no threads that perform non-atomic concurrent write operations.
-                // - There is no writer that updates the value using atomic operations of different granularity.
-                //
-                // If the atomic operation is not used here, it will cause a data race
-                // when `write` performs concurrent write operation.
-                // Such a data race is sometimes considered virtually unproblematic
-                // in SeqLock implementations:
-                //
-                // - https://github.com/Amanieu/seqlock/issues/2
-                // - https://github.com/crossbeam-rs/crossbeam/blob/crossbeam-utils-0.8.7/crossbeam-utils/src/atomic/atomic_cell.rs#L1111-L1116
-                // - https://rust-lang.zulipchat.com/#narrow/stream/136281-t-lang.2Fwg-unsafe-code-guidelines/topic/avoiding.20UB.20due.20to.20races.20by.20discarding.20result.3F
-                //
-                // However, in our use case, the implementation that loads/stores value as
-                // chunks of usize is enough fast and sound, so we use that implementation.
-                //
-                // See also atomic-memcpy crate, a generic implementation of this pattern:
-                // https://github.com/taiki-e/atomic-memcpy
-                let chunks = unsafe { self.chunks() };
-                for i in 0..Self::LEN {
-                    dst[i] = chunks[i].load(Ordering::Relaxed);
-                }
-                // SAFETY: integers are plain old data types so we can always transmute to them.
-                unsafe { mem::transmute::<[Chunk; Self::LEN], $int_type>(dst) }
-            }
-
-            #[inline]
-            fn read(&self, _guard: &SeqLockWriteGuard<'static>) -> $int_type {
-                // This calls optimistic_read that can return teared value, but the resulting value
-                // is guaranteed not to be teared because we hold the lock to write.
-                self.optimistic_read()
-            }
-
-            #[inline]
-            fn write(&self, val: $int_type, _guard: &SeqLockWriteGuard<'static>) {
-                // SAFETY: integers are plain old data types so we can always transmute them to arrays of integers.
-                let val = unsafe { mem::transmute::<$int_type, [Chunk; Self::LEN]>(val) };
-                // SAFETY:
-                // - The guard guarantees that we hold the lock to write.
-                // - There are no threads that perform non-atomic concurrent read or write operations.
-                //
-                // See optimistic_read for the reason that atomic operations are used here.
-                let chunks = unsafe { self.chunks() };
-                for i in 0..Self::LEN {
-                    chunks[i].store(val[i], Ordering::Relaxed);
-                }
-            }
-        }
-
-        // Send is implicitly implemented.
-        // SAFETY: any data races are prevented by the lock and atomic operation.
-        unsafe impl Sync for $atomic_type {}
-
-        impl_default_no_fetch_ops!($atomic_type, $int_type);
-        impl_default_bit_opts!($atomic_type, $int_type);
-        impl $atomic_type {
-            #[inline]
-            pub(crate) const fn new(v: $int_type) -> Self {
-                Self { v: UnsafeCell::new(v) }
-            }
-
-            #[inline]
-            pub(crate) fn is_lock_free() -> bool {
-                Self::is_always_lock_free()
-            }
-            #[inline]
-            pub(crate) const fn is_always_lock_free() -> bool {
-                false
-            }
-
-            #[inline]
-            pub(crate) fn get_mut(&mut self) -> &mut $int_type {
-                // SAFETY: the mutable reference guarantees unique ownership.
-                // (UnsafeCell::get_mut requires Rust 1.50)
-                unsafe { &mut *self.v.get() }
-            }
-
-            #[inline]
-            pub(crate) fn into_inner(self) -> $int_type {
-                self.v.into_inner()
-            }
-
-            #[inline]
-            #[cfg_attr(all(debug_assertions, not(portable_atomic_no_track_caller)), track_caller)]
-            pub(crate) fn load(&self, order: Ordering) -> $int_type {
-                crate::utils::assert_load_ordering(order);
-                let lock = lock(self.v.get() as usize);
-
-                // Try doing an optimistic read first.
-                if let Some(stamp) = lock.optimistic_read() {
-                    let val = self.optimistic_read();
-
-                    if lock.validate_read(stamp) {
-                        return val;
-                    }
-                }
-
-                // Grab a regular write lock so that writers don't starve this load.
-                let guard = lock.write();
-                let val = self.read(&guard);
-                // The value hasn't been changed. Drop the guard without incrementing the stamp.
-                guard.abort();
-                val
-            }
-
-            #[inline]
-            #[cfg_attr(all(debug_assertions, not(portable_atomic_no_track_caller)), track_caller)]
-            pub(crate) fn store(&self, val: $int_type, order: Ordering) {
-                crate::utils::assert_store_ordering(order);
-                let guard = lock(self.v.get() as usize).write();
-                self.write(val, &guard)
-            }
-
-            #[inline]
-            pub(crate) fn swap(&self, val: $int_type, _order: Ordering) -> $int_type {
-                let guard = lock(self.v.get() as usize).write();
-                let prev = self.read(&guard);
-                self.write(val, &guard);
-                prev
-            }
-
-            #[inline]
-            #[cfg_attr(all(debug_assertions, not(portable_atomic_no_track_caller)), track_caller)]
-            pub(crate) fn compare_exchange(
-                &self,
-                current: $int_type,
-                new: $int_type,
-                success: Ordering,
-                failure: Ordering,
-            ) -> Result<$int_type, $int_type> {
-                crate::utils::assert_compare_exchange_ordering(success, failure);
-                let guard = lock(self.v.get() as usize).write();
-                let prev = self.read(&guard);
-                if prev == current {
-                    self.write(new, &guard);
-                    Ok(prev)
-                } else {
-                    // The value hasn't been changed. Drop the guard without incrementing the stamp.
-                    guard.abort();
-                    Err(prev)
-                }
-            }
-
-            #[inline]
-            #[cfg_attr(all(debug_assertions, not(portable_atomic_no_track_caller)), track_caller)]
-            pub(crate) fn compare_exchange_weak(
-                &self,
-                current: $int_type,
-                new: $int_type,
-                success: Ordering,
-                failure: Ordering,
-            ) -> Result<$int_type, $int_type> {
-                self.compare_exchange(current, new, success, failure)
-            }
-
-            #[inline]
-            pub(crate) fn fetch_add(&self, val: $int_type, _order: Ordering) -> $int_type {
-                let guard = lock(self.v.get() as usize).write();
-                let prev = self.read(&guard);
-                self.write(prev.wrapping_add(val), &guard);
-                prev
-            }
-
-            #[inline]
-            pub(crate) fn fetch_sub(&self, val: $int_type, _order: Ordering) -> $int_type {
-                let guard = lock(self.v.get() as usize).write();
-                let prev = self.read(&guard);
-                self.write(prev.wrapping_sub(val), &guard);
-                prev
-            }
-
-            #[inline]
-            pub(crate) fn fetch_and(&self, val: $int_type, _order: Ordering) -> $int_type {
-                let guard = lock(self.v.get() as usize).write();
-                let prev = self.read(&guard);
-                self.write(prev & val, &guard);
-                prev
-            }
-
-            #[inline]
-            pub(crate) fn fetch_nand(&self, val: $int_type, _order: Ordering) -> $int_type {
-                let guard = lock(self.v.get() as usize).write();
-                let prev = self.read(&guard);
-                self.write(!(prev & val), &guard);
-                prev
-            }
-
-            #[inline]
-            pub(crate) fn fetch_or(&self, val: $int_type, _order: Ordering) -> $int_type {
-                let guard = lock(self.v.get() as usize).write();
-                let prev = self.read(&guard);
-                self.write(prev | val, &guard);
-                prev
-            }
-
-            #[inline]
-            pub(crate) fn fetch_xor(&self, val: $int_type, _order: Ordering) -> $int_type {
-                let guard = lock(self.v.get() as usize).write();
-                let prev = self.read(&guard);
-                self.write(prev ^ val, &guard);
-                prev
-            }
-
-            #[inline]
-            pub(crate) fn fetch_max(&self, val: $int_type, _order: Ordering) -> $int_type {
-                let guard = lock(self.v.get() as usize).write();
-                let prev = self.read(&guard);
-                self.write(core::cmp::max(prev, val), &guard);
-                prev
-            }
-
-            #[inline]
-            pub(crate) fn fetch_min(&self, val: $int_type, _order: Ordering) -> $int_type {
-                let guard = lock(self.v.get() as usize).write();
-                let prev = self.read(&guard);
-                self.write(core::cmp::min(prev, val), &guard);
-                prev
-            }
-
-            #[inline]
-            pub(crate) fn fetch_not(&self, _order: Ordering) -> $int_type {
-                let guard = lock(self.v.get() as usize).write();
-                let prev = self.read(&guard);
-                self.write(!prev, &guard);
-                prev
-            }
-            #[inline]
-            pub(crate) fn not(&self, order: Ordering) {
-                self.fetch_not(order);
-            }
-
-            #[inline]
-            pub(crate) fn fetch_neg(&self, _order: Ordering) -> $int_type {
-                let guard = lock(self.v.get() as usize).write();
-                let prev = self.read(&guard);
-                self.write(prev.wrapping_neg(), &guard);
-                prev
-            }
-            #[inline]
-            pub(crate) fn neg(&self, order: Ordering) {
-                self.fetch_neg(order);
-            }
-
-            #[inline]
-            pub(crate) const fn as_ptr(&self) -> *mut $int_type {
-                self.v.get()
-            }
-        }
-    };
-}
-
-#[cfg_attr(portable_atomic_no_cfg_target_has_atomic, cfg(any(test, portable_atomic_no_atomic_64)))]
-#[cfg_attr(
-    not(portable_atomic_no_cfg_target_has_atomic),
-    cfg(any(test, not(target_has_atomic = "64")))
-)]
-cfg_no_fast_atomic_64! {
-    atomic!(AtomicI64, i64, 8);
-    atomic!(AtomicU64, u64, 8);
-}
-
-atomic!(AtomicI128, i128, 16);
-atomic!(AtomicU128, u128, 16);
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    cfg_no_fast_atomic_64! {
-        test_atomic_int!(i64);
-        test_atomic_int!(u64);
-    }
-    test_atomic_int!(i128);
-    test_atomic_int!(u128);
-
-    // load/store/swap implementation is not affected by signedness, so it is
-    // enough to test only unsigned types.
-    cfg_no_fast_atomic_64! {
-        stress_test!(u64);
-    }
-    stress_test!(u128);
-}