Source code
Revision control
Copy as Markdown
Other Tools
//! 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]
///
/// [Apple]: https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man2/msync.2.html
/// [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)
}