std: begin moving platform support modules into `pal`

1 files changed, 0 insertions, 357 deletions

diff --git a/library/std/src/sys/windows/mod.rs b/library/std/src/sys/windows/mod.rs
deleted file mode 100644
index 8b722f01a5d..00000000000
--- a/library/std/src/sys/windows/mod.rs
+++ /dev/null
@@ -1,357 +0,0 @@
-#![allow(missing_docs, nonstandard_style)]
-
-use crate::ffi::{OsStr, OsString};
-use crate::io::ErrorKind;
-use crate::mem::MaybeUninit;
-use crate::os::windows::ffi::{OsStrExt, OsStringExt};
-use crate::path::PathBuf;
-use crate::time::Duration;
-
-pub use self::rand::hashmap_random_keys;
-
-#[macro_use]
-pub mod compat;
-
-pub mod alloc;
-pub mod args;
-pub mod c;
-pub mod cmath;
-pub mod env;
-pub mod fs;
-pub mod handle;
-pub mod io;
-pub mod locks;
-pub mod memchr;
-pub mod net;
-pub mod os;
-pub mod os_str;
-pub mod path;
-pub mod pipe;
-pub mod process;
-pub mod rand;
-pub mod stdio;
-pub mod thread;
-pub mod thread_local_dtor;
-pub mod thread_local_key;
-pub mod thread_parking;
-pub mod time;
-cfg_if::cfg_if! {
-    if #[cfg(not(target_vendor = "uwp"))] {
-        pub mod stack_overflow;
-    } else {
-        pub mod stack_overflow_uwp;
-        pub use self::stack_overflow_uwp as stack_overflow;
-    }
-}
-
-mod api;
-
-/// Map a Result<T, WinError> to io::Result<T>.
-trait IoResult<T> {
-    fn io_result(self) -> crate::io::Result<T>;
-}
-impl<T> IoResult<T> for Result<T, api::WinError> {
-    fn io_result(self) -> crate::io::Result<T> {
-        self.map_err(|e| crate::io::Error::from_raw_os_error(e.code as i32))
-    }
-}
-
-// SAFETY: must be called only once during runtime initialization.
-// NOTE: this is not guaranteed to run, for example when Rust code is called externally.
-pub unsafe fn init(_argc: isize, _argv: *const *const u8, _sigpipe: u8) {
-    stack_overflow::init();
-
-    // Normally, `thread::spawn` will call `Thread::set_name` but since this thread already
-    // exists, we have to call it ourselves.
-    thread::Thread::set_name(&c"main");
-}
-
-// SAFETY: must be called only once during runtime cleanup.
-// NOTE: this is not guaranteed to run, for example when the program aborts.
-pub unsafe fn cleanup() {
-    net::cleanup();
-}
-
-#[inline]
-pub fn is_interrupted(_errno: i32) -> bool {
-    false
-}
-
-pub fn decode_error_kind(errno: i32) -> ErrorKind {
-    use ErrorKind::*;
-
-    match errno as c::DWORD {
-        c::ERROR_ACCESS_DENIED => return PermissionDenied,
-        c::ERROR_ALREADY_EXISTS => return AlreadyExists,
-        c::ERROR_FILE_EXISTS => return AlreadyExists,
-        c::ERROR_BROKEN_PIPE => return BrokenPipe,
-        c::ERROR_FILE_NOT_FOUND
-        | c::ERROR_PATH_NOT_FOUND
-        | c::ERROR_INVALID_DRIVE
-        | c::ERROR_BAD_NETPATH
-        | c::ERROR_BAD_NET_NAME => return NotFound,
-        c::ERROR_NO_DATA => return BrokenPipe,
-        c::ERROR_INVALID_NAME | c::ERROR_BAD_PATHNAME => return InvalidFilename,
-        c::ERROR_INVALID_PARAMETER => return InvalidInput,
-        c::ERROR_NOT_ENOUGH_MEMORY | c::ERROR_OUTOFMEMORY => return OutOfMemory,
-        c::ERROR_SEM_TIMEOUT
-        | c::WAIT_TIMEOUT
-        | c::ERROR_DRIVER_CANCEL_TIMEOUT
-        | c::ERROR_OPERATION_ABORTED
-        | c::ERROR_SERVICE_REQUEST_TIMEOUT
-        | c::ERROR_COUNTER_TIMEOUT
-        | c::ERROR_TIMEOUT
-        | c::ERROR_RESOURCE_CALL_TIMED_OUT
-        | c::ERROR_CTX_MODEM_RESPONSE_TIMEOUT
-        | c::ERROR_CTX_CLIENT_QUERY_TIMEOUT
-        | c::FRS_ERR_SYSVOL_POPULATE_TIMEOUT
-        | c::ERROR_DS_TIMELIMIT_EXCEEDED
-        | c::DNS_ERROR_RECORD_TIMED_OUT
-        | c::ERROR_IPSEC_IKE_TIMED_OUT
-        | c::ERROR_RUNLEVEL_SWITCH_TIMEOUT
-        | c::ERROR_RUNLEVEL_SWITCH_AGENT_TIMEOUT => return TimedOut,
-        c::ERROR_CALL_NOT_IMPLEMENTED => return Unsupported,
-        c::ERROR_HOST_UNREACHABLE => return HostUnreachable,
-        c::ERROR_NETWORK_UNREACHABLE => return NetworkUnreachable,
-        c::ERROR_DIRECTORY => return NotADirectory,
-        c::ERROR_DIRECTORY_NOT_SUPPORTED => return IsADirectory,
-        c::ERROR_DIR_NOT_EMPTY => return DirectoryNotEmpty,
-        c::ERROR_WRITE_PROTECT => return ReadOnlyFilesystem,
-        c::ERROR_DISK_FULL | c::ERROR_HANDLE_DISK_FULL => return StorageFull,
-        c::ERROR_SEEK_ON_DEVICE => return NotSeekable,
-        c::ERROR_DISK_QUOTA_EXCEEDED => return FilesystemQuotaExceeded,
-        c::ERROR_FILE_TOO_LARGE => return FileTooLarge,
-        c::ERROR_BUSY => return ResourceBusy,
-        c::ERROR_POSSIBLE_DEADLOCK => return Deadlock,
-        c::ERROR_NOT_SAME_DEVICE => return CrossesDevices,
-        c::ERROR_TOO_MANY_LINKS => return TooManyLinks,
-        c::ERROR_FILENAME_EXCED_RANGE => return InvalidFilename,
-        _ => {}
-    }
-
-    match errno {
-        c::WSAEACCES => PermissionDenied,
-        c::WSAEADDRINUSE => AddrInUse,
-        c::WSAEADDRNOTAVAIL => AddrNotAvailable,
-        c::WSAECONNABORTED => ConnectionAborted,
-        c::WSAECONNREFUSED => ConnectionRefused,
-        c::WSAECONNRESET => ConnectionReset,
-        c::WSAEINVAL => InvalidInput,
-        c::WSAENOTCONN => NotConnected,
-        c::WSAEWOULDBLOCK => WouldBlock,
-        c::WSAETIMEDOUT => TimedOut,
-        c::WSAEHOSTUNREACH => HostUnreachable,
-        c::WSAENETDOWN => NetworkDown,
-        c::WSAENETUNREACH => NetworkUnreachable,
-
-        _ => Uncategorized,
-    }
-}
-
-pub fn unrolled_find_u16s(needle: u16, haystack: &[u16]) -> Option<usize> {
-    let ptr = haystack.as_ptr();
-    let mut start = haystack;
-
-    // For performance reasons unfold the loop eight times.
-    while start.len() >= 8 {
-        macro_rules! if_return {
-            ($($n:literal,)+) => {
-                $(
-                    if start[$n] == needle {
-                        return Some(((&start[$n] as *const u16).addr() - ptr.addr()) / 2);
-                    }
-                )+
-            }
-        }
-
-        if_return!(0, 1, 2, 3, 4, 5, 6, 7,);
-
-        start = &start[8..];
-    }
-
-    for c in start {
-        if *c == needle {
-            return Some(((c as *const u16).addr() - ptr.addr()) / 2);
-        }
-    }
-    None
-}
-
-pub fn to_u16s<S: AsRef<OsStr>>(s: S) -> crate::io::Result<Vec<u16>> {
-    fn inner(s: &OsStr) -> crate::io::Result<Vec<u16>> {
-        // Most paths are ASCII, so reserve capacity for as much as there are bytes
-        // in the OsStr plus one for the null-terminating character. We are not
-        // wasting bytes here as paths created by this function are primarily used
-        // in an ephemeral fashion.
-        let mut maybe_result = Vec::with_capacity(s.len() + 1);
-        maybe_result.extend(s.encode_wide());
-
-        if unrolled_find_u16s(0, &maybe_result).is_some() {
-            return Err(crate::io::const_io_error!(
-                ErrorKind::InvalidInput,
-                "strings passed to WinAPI cannot contain NULs",
-            ));
-        }
-        maybe_result.push(0);
-        Ok(maybe_result)
-    }
-    inner(s.as_ref())
-}
-
-// Many Windows APIs follow a pattern of where we hand a buffer and then they
-// will report back to us how large the buffer should be or how many bytes
-// currently reside in the buffer. This function is an abstraction over these
-// functions by making them easier to call.
-//
-// The first callback, `f1`, is yielded a (pointer, len) pair which can be
-// passed to a syscall. The `ptr` is valid for `len` items (u16 in this case).
-// The closure is expected to return what the syscall returns which will be
-// interpreted by this function to determine if the syscall needs to be invoked
-// again (with more buffer space).
-//
-// Once the syscall has completed (errors bail out early) the second closure is
-// yielded the data which has been read from the syscall. The return value
-// from this closure is then the return value of the function.
-fn fill_utf16_buf<F1, F2, T>(mut f1: F1, f2: F2) -> crate::io::Result<T>
-where
-    F1: FnMut(*mut u16, c::DWORD) -> c::DWORD,
-    F2: FnOnce(&[u16]) -> T,
-{
-    // Start off with a stack buf but then spill over to the heap if we end up
-    // needing more space.
-    //
-    // This initial size also works around `GetFullPathNameW` returning
-    // incorrect size hints for some short paths:
-    // https://github.com/dylni/normpath/issues/5
-    let mut stack_buf: [MaybeUninit<u16>; 512] = MaybeUninit::uninit_array();
-    let mut heap_buf: Vec<MaybeUninit<u16>> = Vec::new();
-    unsafe {
-        let mut n = stack_buf.len();
-        loop {
-            let buf = if n <= stack_buf.len() {
-                &mut stack_buf[..]
-            } else {
-                let extra = n - heap_buf.len();
-                heap_buf.reserve(extra);
-                // We used `reserve` and not `reserve_exact`, so in theory we
-                // may have gotten more than requested. If so, we'd like to use
-                // it... so long as we won't cause overflow.
-                n = heap_buf.capacity().min(c::DWORD::MAX as usize);
-                // Safety: MaybeUninit<u16> does not need initialization
-                heap_buf.set_len(n);
-                &mut heap_buf[..]
-            };
-
-            // This function is typically called on windows API functions which
-            // will return the correct length of the string, but these functions
-            // also return the `0` on error. In some cases, however, the
-            // returned "correct length" may actually be 0!
-            //
-            // To handle this case we call `SetLastError` to reset it to 0 and
-            // then check it again if we get the "0 error value". If the "last
-            // error" is still 0 then we interpret it as a 0 length buffer and
-            // not an actual error.
-            c::SetLastError(0);
-            let k = match f1(buf.as_mut_ptr().cast::<u16>(), n as c::DWORD) {
-                0 if api::get_last_error().code == 0 => 0,
-                0 => return Err(crate::io::Error::last_os_error()),
-                n => n,
-            } as usize;
-            if k == n && api::get_last_error().code == c::ERROR_INSUFFICIENT_BUFFER {
-                n = n.saturating_mul(2).min(c::DWORD::MAX as usize);
-            } else if k > n {
-                n = k;
-            } else if k == n {
-                // It is impossible to reach this point.
-                // On success, k is the returned string length excluding the null.
-                // On failure, k is the required buffer length including the null.
-                // Therefore k never equals n.
-                unreachable!();
-            } else {
-                // Safety: First `k` values are initialized.
-                let slice: &[u16] = MaybeUninit::slice_assume_init_ref(&buf[..k]);
-                return Ok(f2(slice));
-            }
-        }
-    }
-}
-
-fn os2path(s: &[u16]) -> PathBuf {
-    PathBuf::from(OsString::from_wide(s))
-}
-
-pub fn truncate_utf16_at_nul(v: &[u16]) -> &[u16] {
-    match unrolled_find_u16s(0, v) {
-        // don't include the 0
-        Some(i) => &v[..i],
-        None => v,
-    }
-}
-
-pub trait IsZero {
-    fn is_zero(&self) -> bool;
-}
-
-macro_rules! impl_is_zero {
-    ($($t:ident)*) => ($(impl IsZero for $t {
-        fn is_zero(&self) -> bool {
-            *self == 0
-        }
-    })*)
-}
-
-impl_is_zero! { i8 i16 i32 i64 isize u8 u16 u32 u64 usize }
-
-pub fn cvt<I: IsZero>(i: I) -> crate::io::Result<I> {
-    if i.is_zero() { Err(crate::io::Error::last_os_error()) } else { Ok(i) }
-}
-
-pub fn dur2timeout(dur: Duration) -> c::DWORD {
-    // Note that a duration is a (u64, u32) (seconds, nanoseconds) pair, and the
-    // timeouts in windows APIs are typically u32 milliseconds. To translate, we
-    // have two pieces to take care of:
-    //
-    // * Nanosecond precision is rounded up
-    // * Greater than u32::MAX milliseconds (50 days) is rounded up to INFINITE
-    //   (never time out).
-    dur.as_secs()
-        .checked_mul(1000)
-        .and_then(|ms| ms.checked_add((dur.subsec_nanos() as u64) / 1_000_000))
-        .and_then(|ms| ms.checked_add(if dur.subsec_nanos() % 1_000_000 > 0 { 1 } else { 0 }))
-        .map(|ms| if ms > <c::DWORD>::MAX as u64 { c::INFINITE } else { ms as c::DWORD })
-        .unwrap_or(c::INFINITE)
-}
-
-/// Use `__fastfail` to abort the process
-///
-/// This is the same implementation as in libpanic_abort's `__rust_start_panic`. See
-/// that function for more information on `__fastfail`
-#[allow(unreachable_code)]
-pub fn abort_internal() -> ! {
-    #[allow(unused)]
-    const FAST_FAIL_FATAL_APP_EXIT: usize = 7;
-    #[cfg(not(miri))] // inline assembly does not work in Miri
-    unsafe {
-        cfg_if::cfg_if! {
-            if #[cfg(any(target_arch = "x86", target_arch = "x86_64"))] {
-                core::arch::asm!("int $$0x29", in("ecx") FAST_FAIL_FATAL_APP_EXIT);
-                crate::intrinsics::unreachable();
-            } else if #[cfg(all(target_arch = "arm", target_feature = "thumb-mode"))] {
-                core::arch::asm!(".inst 0xDEFB", in("r0") FAST_FAIL_FATAL_APP_EXIT);
-                crate::intrinsics::unreachable();
-            } else if #[cfg(target_arch = "aarch64")] {
-                core::arch::asm!("brk 0xF003", in("x0") FAST_FAIL_FATAL_APP_EXIT);
-                crate::intrinsics::unreachable();
-            }
-        }
-    }
-    crate::intrinsics::abort();
-}
-
-/// Align the inner value to 8 bytes.
-///
-/// This is enough for almost all of the buffers we're likely to work with in
-/// the Windows APIs we use.
-#[repr(C, align(8))]
-#[derive(Copy, Clone)]
-pub(crate) struct Align8<T: ?Sized>(pub T);