| //! 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 `msync`] |
| /// |
| /// [POSIX]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/msync.html |
| /// [Linux `msync`]: https://man7.org/linux/man-pages/man2/msync.2.html |
| #[inline] |
| pub unsafe fn msync(addr: *mut c_void, len: usize, flags: MsyncFlags) -> io::Result<()> { |
| backend::mm::syscalls::msync(addr, len, flags) |
| } |
