Unix Sender wip

Author: jimblandy

wgpu-remote/src/transport/unix.rs

@@ -1 +1,21 @@
 //! Transports based on Unix facilities.
+
+/// A [`Sender`] implementation based on mmap and Unix domain sockets.
+///
+/// This type implements [`transport::Sender`] based on a Unix domain socket
+/// connection to the counterpart that you supply. It uses the [`memfd_create`]
+/// system call to create shared memory segments, and then uses [AF_UNIX]'s
+/// `SCM_RIGHTS` ancillary message to pass those file descriptors across the
+/// socket to the counterpart.
+///
+/// [`transport::Sender`]: crate::transport::Sender
+/// [`memfd_create`]: https://man7.org/linux/man-pages/man2/memfd_create.2.html
+/// [AF_UNIX]: https://man7.org/linux/man-pages/man7/unix.7.html
+struct Sender {
+    /// The connection to the counterpart.
+    socket: std::os::fd::OwnedFd,
+
+    /// The id of the next shared memory segment we'll allocate.
+    next_shmem_id: std::sync::AtomicUsize,
+}
+