Vendor things

third-party/vendor/rustix/src/mm/msync.rs

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+//! The `msync` function.
+//!
+//! # Safety
+//!
+//! `msync` operates on a raw pointer. Some forms of `msync` may mutate the
+//! memory or have other side effects.
+#![allow(unsafe_code)]
+
+use crate::{backend, io};
+use core::ffi::c_void;
+
+pub use backend::mm::types::MsyncFlags;
+
+/// `msync(addr, len, flags)`—Synchronizes a memory-mapping with its backing
+/// storage.
+///
+/// # Safety
+///
+/// `addr` must be a valid pointer to memory that is appropriate to call
+/// `msync` on. Some forms of `msync` may mutate the memory or evoke a variety
+/// of side-effects on the mapping and/or the file.
+///
+/// # References
+///  - [POSIX]
+///  - [Linux]
+///  - [Apple]
+///  - [FreeBSD]
+///  - [NetBSD]
+///  - [OpenBSD]
+///  - [DragonFly BSD]
+///  - [illumos]
+///  - [glibc]
+///
+/// [POSIX]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/msync.html
+/// [Linux]: https://man7.org/linux/man-pages/man2/msync.2.html
+/// [Apple]: https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man2/msync.2.html
+/// [FreeBSD]: https://man.freebsd.org/cgi/man.cgi?query=msync&sektion=2
+/// [NetBSD]: https://man.netbsd.org/msync.2
+/// [OpenBSD]: https://man.openbsd.org/msync.2
+/// [DragonFly BSD]: https://man.dragonflybsd.org/?command=msync&section=2
+/// [illumos]: https://illumos.org/man/3C/msync
+/// [glibc]: https://www.gnu.org/software/libc/manual/html_node/Memory_002dmapped-I_002fO.html#index-msync
+#[inline]
+pub unsafe fn msync(addr: *mut c_void, len: usize, flags: MsyncFlags) -> io::Result<()> {
+    backend::mm::syscalls::msync(addr, len, flags)
+}