Vendor things

third-party/vendor/rustix/src/shm.rs

@@ -0,0 +1,40 @@
+//! POSIX shared memory
+
+use crate::fd::OwnedFd;
+use crate::{backend, io, path};
+
+pub use crate::backend::fs::types::Mode;
+pub use crate::backend::shm::types::ShmOFlags;
+
+/// `shm_open(name, oflags, mode)`—Opens a shared memory object.
+///
+/// For portability, `name` should begin with a slash, contain no other
+/// slashes, and be no longer than an implementation-defined limit (255 on
+/// Linux).
+///
+/// Exactly one of [`ShmOFlags::RDONLY`] and [`ShmOFlags::RDWR`] should be
+/// passed. The file descriptor will be opened with `FD_CLOEXEC` set.
+///
+/// # References
+///  - [POSIX]
+///  - [Linux]
+///
+/// [POSIX]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/shm_open.html
+/// [Linux]: https://man7.org/linux/man-pages/man3/shm_open.3.html
+#[inline]
+pub fn shm_open<P: path::Arg>(name: P, flags: ShmOFlags, mode: Mode) -> io::Result<OwnedFd> {
+    name.into_with_c_str(|name| backend::shm::syscalls::shm_open(name, flags, mode))
+}
+
+/// `shm_unlink(name)`—Unlinks a shared memory object.
+///
+/// # References
+///  - [POSIX]
+///  - [Linux]
+///
+/// [POSIX]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/shm_unlink.html
+/// [Linux]: https://man7.org/linux/man-pages/man3/shm_unlink.3.html
+#[inline]
+pub fn shm_unlink<P: path::Arg>(name: P) -> io::Result<()> {
+    name.into_with_c_str(backend::shm::syscalls::shm_unlink)
+}