Deleted vendor folder

1 files changed, 0 insertions, 286 deletions

diff --git a/vendor/rustix/src/weak.rs b/vendor/rustix/src/weak.rs
deleted file mode 100644
index 3cda8e6..0000000
--- a/vendor/rustix/src/weak.rs
+++ /dev/null
@@ -1,286 +0,0 @@
-// Implementation derived from `weak` in Rust's
-// library/std/src/sys/unix/weak.rs at revision
-// fd0cb0cdc21dd9c06025277d772108f8d42cb25f.
-//
-// Ideally we should update to a newer version which doesn't need `dlsym`,
-// however that depends on the `extern_weak` feature which is currently
-// unstable.
-
-#![cfg_attr(linux_raw, allow(unsafe_code))]
-
-//! Support for "weak linkage" to symbols on Unix
-//!
-//! Some I/O operations we do in libstd require newer versions of OSes but we
-//! need to maintain binary compatibility with older releases for now. In order
-//! to use the new functionality when available we use this module for
-//! detection.
-//!
-//! One option to use here is weak linkage, but that is unfortunately only
-//! really workable on Linux. Hence, use dlsym to get the symbol value at
-//! runtime. This is also done for compatibility with older versions of glibc,
-//! and to avoid creating dependencies on `GLIBC_PRIVATE` symbols. It assumes
-//! that we've been dynamically linked to the library the symbol comes from,
-//! but that is currently always the case for things like libpthread/libc.
-//!
-//! A long time ago this used weak linkage for the `__pthread_get_minstack`
-//! symbol, but that caused Debian to detect an unnecessarily strict versioned
-//! dependency on libc6 (#23628).
-
-// There are a variety of `#[cfg]`s controlling which targets are involved in
-// each instance of `weak!` and `syscall!`. Rather than trying to unify all of
-// that, we'll just allow that some unix targets don't use this module at all.
-#![allow(dead_code, unused_macros)]
-#![allow(clippy::doc_markdown)]
-
-use crate::ffi::CStr;
-use core::ffi::c_void;
-use core::ptr::null_mut;
-use core::sync::atomic::{self, AtomicPtr, Ordering};
-use core::{marker, mem};
-
-const NULL: *mut c_void = null_mut();
-const INVALID: *mut c_void = 1 as *mut c_void;
-
-macro_rules! weak {
-    ($vis:vis fn $name:ident($($t:ty),*) -> $ret:ty) => (
-        #[allow(non_upper_case_globals)]
-        $vis static $name: $crate::weak::Weak<unsafe extern fn($($t),*) -> $ret> =
-            $crate::weak::Weak::new(concat!(stringify!($name), '\0'));
-    )
-}
-
-pub(crate) struct Weak<F> {
-    name: &'static str,
-    addr: AtomicPtr<c_void>,
-    _marker: marker::PhantomData<F>,
-}
-
-impl<F> Weak<F> {
-    pub(crate) const fn new(name: &'static str) -> Self {
-        Self {
-            name,
-            addr: AtomicPtr::new(INVALID),
-            _marker: marker::PhantomData,
-        }
-    }
-
-    pub(crate) fn get(&self) -> Option<F> {
-        assert_eq!(mem::size_of::<F>(), mem::size_of::<usize>());
-        unsafe {
-            // Relaxed is fine here because we fence before reading through the
-            // pointer (see the comment below).
-            match self.addr.load(Ordering::Relaxed) {
-                INVALID => self.initialize(),
-                NULL => None,
-                addr => {
-                    let func = mem::transmute_copy::<*mut c_void, F>(&addr);
-                    // The caller is presumably going to read through this value
-                    // (by calling the function we've dlsymed). This means we'd
-                    // need to have loaded it with at least C11's consume
-                    // ordering in order to be guaranteed that the data we read
-                    // from the pointer isn't from before the pointer was
-                    // stored. Rust has no equivalent to memory_order_consume,
-                    // so we use an acquire fence (sorry, ARM).
-                    //
-                    // Now, in practice this likely isn't needed even on CPUs
-                    // where relaxed and consume mean different things. The
-                    // symbols we're loading are probably present (or not) at
-                    // init, and even if they aren't the runtime dynamic loader
-                    // is extremely likely have sufficient barriers internally
-                    // (possibly implicitly, for example the ones provided by
-                    // invoking `mprotect`).
-                    //
-                    // That said, none of that's *guaranteed*, and so we fence.
-                    atomic::fence(Ordering::Acquire);
-                    Some(func)
-                }
-            }
-        }
-    }
-
-    // Cold because it should only happen during first-time initialization.
-    #[cold]
-    unsafe fn initialize(&self) -> Option<F> {
-        let val = fetch(self.name);
-        // This synchronizes with the acquire fence in `get`.
-        self.addr.store(val, Ordering::Release);
-
-        match val {
-            NULL => None,
-            addr => Some(mem::transmute_copy::<*mut c_void, F>(&addr)),
-        }
-    }
-}
-
-// To avoid having the `linux_raw` backend depend on the libc crate, just
-// declare the few things we need in a module called `libc` so that `fetch`
-// uses it.
-#[cfg(linux_raw)]
-mod libc {
-    use core::ptr;
-    use linux_raw_sys::ctypes::{c_char, c_void};
-
-    #[cfg(all(target_os = "android", target_pointer_width = "32"))]
-    pub(super) const RTLD_DEFAULT: *mut c_void = -1isize as *mut c_void;
-    #[cfg(not(all(target_os = "android", target_pointer_width = "32")))]
-    pub(super) const RTLD_DEFAULT: *mut c_void = ptr::null_mut();
-
-    extern "C" {
-        pub(super) fn dlsym(handle: *mut c_void, symbol: *const c_char) -> *mut c_void;
-    }
-
-    #[test]
-    fn test_abi() {
-        assert_eq!(self::RTLD_DEFAULT, ::libc::RTLD_DEFAULT);
-    }
-}
-
-unsafe fn fetch(name: &str) -> *mut c_void {
-    let name = match CStr::from_bytes_with_nul(name.as_bytes()) {
-        Ok(c_str) => c_str,
-        Err(..) => return null_mut(),
-    };
-    libc::dlsym(libc::RTLD_DEFAULT, name.as_ptr().cast())
-}
-
-#[cfg(not(linux_kernel))]
-macro_rules! syscall {
-    (fn $name:ident($($arg_name:ident: $t:ty),*) via $_sys_name:ident -> $ret:ty) => (
-        unsafe fn $name($($arg_name: $t),*) -> $ret {
-            weak! { fn $name($($t),*) -> $ret }
-
-            if let Some(fun) = $name.get() {
-                fun($($arg_name),*)
-            } else {
-                libc_errno::set_errno(libc_errno::Errno(libc::ENOSYS));
-                -1
-            }
-        }
-    )
-}
-
-#[cfg(linux_kernel)]
-macro_rules! syscall {
-    (fn $name:ident($($arg_name:ident: $t:ty),*) via $sys_name:ident -> $ret:ty) => (
-        unsafe fn $name($($arg_name:$t),*) -> $ret {
-            // This looks like a hack, but `concat_idents` only accepts idents
-            // (not paths).
-            use libc::*;
-
-            trait AsSyscallArg {
-                type SyscallArgType;
-                fn into_syscall_arg(self) -> Self::SyscallArgType;
-            }
-
-            // Pass pointer types as pointers, to preserve provenance.
-            impl<T> AsSyscallArg for *mut T {
-                type SyscallArgType = *mut T;
-                fn into_syscall_arg(self) -> Self::SyscallArgType { self }
-            }
-            impl<T> AsSyscallArg for *const T {
-                type SyscallArgType = *const T;
-                fn into_syscall_arg(self) -> Self::SyscallArgType { self }
-            }
-
-            // Pass `BorrowedFd` values as the integer value.
-            impl AsSyscallArg for $crate::fd::BorrowedFd<'_> {
-                type SyscallArgType = ::libc::c_int;
-                fn into_syscall_arg(self) -> Self::SyscallArgType {
-                    $crate::fd::AsRawFd::as_raw_fd(&self) as _
-                }
-            }
-
-            // Coerce integer values into `c_long`.
-            impl AsSyscallArg for i8 {
-                type SyscallArgType = ::libc::c_int;
-                fn into_syscall_arg(self) -> Self::SyscallArgType { self.into() }
-            }
-            impl AsSyscallArg for u8 {
-                type SyscallArgType = ::libc::c_int;
-                fn into_syscall_arg(self) -> Self::SyscallArgType { self.into() }
-            }
-            impl AsSyscallArg for i16 {
-                type SyscallArgType = ::libc::c_int;
-                fn into_syscall_arg(self) -> Self::SyscallArgType { self.into() }
-            }
-            impl AsSyscallArg for u16 {
-                type SyscallArgType = ::libc::c_int;
-                fn into_syscall_arg(self) -> Self::SyscallArgType { self.into() }
-            }
-            impl AsSyscallArg for i32 {
-                type SyscallArgType = ::libc::c_int;
-                fn into_syscall_arg(self) -> Self::SyscallArgType { self }
-            }
-            impl AsSyscallArg for u32 {
-                type SyscallArgType = ::libc::c_uint;
-                fn into_syscall_arg(self) -> Self::SyscallArgType { self }
-            }
-            impl AsSyscallArg for usize {
-                type SyscallArgType = ::libc::c_ulong;
-                fn into_syscall_arg(self) -> Self::SyscallArgType { self as _ }
-            }
-
-            // On 64-bit platforms, also coerce `i64` and `u64` since `c_long`
-            // is 64-bit and can hold those values.
-            #[cfg(target_pointer_width = "64")]
-            impl AsSyscallArg for i64 {
-                type SyscallArgType = ::libc::c_long;
-                fn into_syscall_arg(self) -> Self::SyscallArgType { self }
-            }
-            #[cfg(target_pointer_width = "64")]
-            impl AsSyscallArg for u64 {
-                type SyscallArgType = ::libc::c_ulong;
-                fn into_syscall_arg(self) -> Self::SyscallArgType { self }
-            }
-
-            // `concat_idents` is [unstable], so we take an extra `sys_name`
-            // parameter and have our users do the concat for us for now.
-            //
-            // [unstable]: https://github.com/rust-lang/rust/issues/29599
-            /*
-            syscall(
-                concat_idents!(SYS_, $name),
-                $($arg_name.into_syscall_arg()),*
-            ) as $ret
-            */
-
-            syscall($sys_name, $($arg_name.into_syscall_arg()),*) as $ret
-        }
-    )
-}
-
-macro_rules! weakcall {
-    ($vis:vis fn $name:ident($($arg_name:ident: $t:ty),*) -> $ret:ty) => (
-        $vis unsafe fn $name($($arg_name: $t),*) -> $ret {
-            weak! { fn $name($($t),*) -> $ret }
-
-            // Use a weak symbol from libc when possible, allowing `LD_PRELOAD`
-            // interposition, but if it's not found just fail.
-            if let Some(fun) = $name.get() {
-                fun($($arg_name),*)
-            } else {
-                libc_errno::set_errno(libc_errno::Errno(libc::ENOSYS));
-                -1
-            }
-        }
-    )
-}
-
-/// A combination of `weakcall` and `syscall`. Use the libc function if it's
-/// available, and fall back to `libc::syscall` otherwise.
-macro_rules! weak_or_syscall {
-    ($vis:vis fn $name:ident($($arg_name:ident: $t:ty),*) via $sys_name:ident -> $ret:ty) => (
-        $vis unsafe fn $name($($arg_name: $t),*) -> $ret {
-            weak! { fn $name($($t),*) -> $ret }
-
-            // Use a weak symbol from libc when possible, allowing `LD_PRELOAD`
-            // interposition, but if it's not found just fail.
-            if let Some(fun) = $name.get() {
-                fun($($arg_name),*)
-            } else {
-                syscall! { fn $name($($arg_name: $t),*) via $sys_name -> $ret }
-                $name($($arg_name),*)
-            }
-        }
-    )
-}