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In the same way that we expose SmallAtomic and SmallPrimitive to allow
Windows to use a value other than an AtomicU32 for its futex state, this
patch switches the primary futex state type from AtomicU32 to
futex::Atomic. The futex::Atomic type should be usable as an atomic
value with underlying primitive type equal to futex::Primitive.
This allows supporting the futex API on systems where the underlying
kernel futex implementation requires more state than simply an
AtomicU32.
All in-tree futex implementations simply define {Atomic,Primitive}
directly as {AtomicU32,u32}.
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This adds lock(), lock_shared(), try_lock(), try_lock_shared(), and
unlock() to File gated behind the file_lock feature flag
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Also drop "Filesystem" from its name
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Windows 10 1601 introduced `FileRenameInfoEx` as well as
`FILE_RENAME_FLAG_POSIX_SEMANTICS`, allowing for atomic renaming. If it
isn't supported, we fall back to `FileRenameInfo`.
This commit also replicates `MoveFileExW`'s behavior of checking whether
the source file is a mount point and moving the mount point instead of
resolving the target path.
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Since the stabilization in #127679 has reached stage0, 1.82-beta, we can
start using `&raw` freely, and even the soft-deprecated `ptr::addr_of!`
and `ptr::addr_of_mut!` can stop allowing the unstable feature.
I intentionally did not change any documentation or tests, but the rest
of those macro uses are all now using `&raw const` or `&raw mut` in the
standard library.
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Implements the ACP https://github.com/rust-lang/libs-team/issues/393.
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Win: Open dir for sync access in remove_dir_all
A small follow up to #129800.
We should explicitly open directories for synchronous access. We ultimately use `GetFileInformationByHandleEx` to read directories which should paper over any issues caused by using async directory reads (or else return an error) but it's better to do the right thing in the first place. Note though that `delete` does not read or write any data so it's not necessary there.
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some const cleanup: remove unnecessary attributes, add const-hack indications
I learned that we use `FIXME(const-hack)` on top of the "const-hack" label. That seems much better since it marks the right place in the code and moves around with the code. So I went through the PRs with that label and added appropriate FIXMEs in the code. IMO this means we can then remove the label -- Cc ``@rust-lang/wg-const-eval.``
I also noticed some const stability attributes that don't do anything useful, and removed them.
r? ``@fee1-dead``
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r=ChrisDenton
Map `ERROR_CANT_RESOLVE_FILENAME` to `ErrorKind::FilesystemLoop`
cc #86442
As summarized in #130188, there seems to be a consensus that this should be done.
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Clean up cfg-gating of ProcessPrng extern
This removes a bit of duplication and is consistent with how `api-ms-win-core-synch-l1-2-0` externs are imported.
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fix: fs::remove_dir_all: treat internal ENOENT as success
fixes #127576
try-job: test-various
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fixes #127576
windows implementation still needs some work
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Formatting tweaks
Some small post-#125443 formatting tweaks.
r? ``@cuviper``
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Add `#[must_use]` to some `into_raw*` functions.
cc #121287
r? ``@cuviper``
Adds `#[must_use = "losing the pointer will leak memory"]`[^1] to `Box::into_raw(_with_allocator)`, `Vec::into_raw_parts(_with_alloc)`, `String::into_raw_parts`[^2], and `rc::{Rc, Weak}::into_raw_with_allocator` (Rc's normal `into_raw` and all of `Arc`'s `into_raw*`s are already `must_use`).
Adds `#[must_use = "losing the raw <resource name may leak resources"]` to `IntoRawFd::into_raw_fd`, `IntoRawSocket::into_raw_socket`, and `IntoRawHandle::into_raw_handle`.
[^1]: "*will* leak memory" may be too-strong wording (since `Box`/`Vec`/`String`/`rc::Weak` might not have a backing allocation), but I left it as-is for simplicity and consistency.
[^2]: `String::into_raw_parts`'s `must_use` message is changed from the previous (possibly misleading) "`self` will be dropped if the result is not used".
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After things that are immediately followed by a `use` declaration and
look like they might apply to that `use` item but actually don't.
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The previous commit updated `rustfmt.toml` appropriately. This commit is
the outcome of running `x fmt --all` with the new formatting options.
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Many tiny changes to stdlib doc comments to make them consistent (for example
"Returns foo", rather than "Return foo", per RFC1574), adding missing periods, paragraph
breaks, backticks for monospace style, and other minor nits.
https://github.com/rust-lang/rfcs/blob/master/text/1574-more-api-documentation-conventions.md#appendix-a-full-conventions-text
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Inject arm32 shims into Windows metadata generation
I had been keen to eventually move to using windows-sys as a normal Cargo dependency. But for linking, compile times and other reasons that's unlikely to ever happen.
So if we're sticking with generated bindings then injecting any necessary missing type definitions (i.e. for the MS unsupported arm32) is simpler than defining whole functions ourselves just because we need to manually implement those types on a tier 3 platform. This also reduces the places we need to change when making changes to how we use `#[link]`.
r? libs
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Remove wrapper functions from c.rs
I'd like for the windows `c.rs` just to contain the basic platform definitions and not anything higher level unless absolutely necessary. So this removes some wrapper functions that weren't really necessary in any case. The functions are only used in a few places which themselves are relatively thin wrappers. The "interesting" bit is that we had an `AlertableIoFn` that abstracted over `ReadFileEx` and `WriteFileEx`. I've replaced this with a closure.
Also I removed an `#[allow(unsafe_op_in_unsafe_fn)]` while I was moving things around.
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Initial implementation of anonymous_pipe API
ACP completed in rust-lang/libs-team#375
Tracking issue: #127154
try-job: x86_64-msvc
try-job: i686-mingw
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Co-authored-by: Alphyr <47725341+a1phyr@users.noreply.github.com>
Co-authored-by: Jubilee <46493976+workingjubilee@users.noreply.github.com>
Signed-off-by: Jiahao XU <Jiahao_XU@outlook.com>
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Windows: move BSD socket shims to netc
On Windows we need to alter a few types so that they can be used in the cross-platform socket code. Currently these alterations are spread throughout the `c` module with some more in the `netc` module.
Let's gather all our BSD compatibility shims in the `netc` module so it's all in one place and easier to discover.
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