Interface to Linux's io_uring interface
iou is a wrapper around the liburing library, which provides a
high level interface to Linux's new io_uring interface. It is
intended to be extensible and flexible for any use case of io_uring, while
still resolving many of the basic safety issues on users' behalf.
The primary API of iou is the IoUring type and its components, the
SubmissionQueue, CompletionQueue and Registrar. This provides a Rust-like
and high level API that manages the io_uring for you.
Safety
Most of the APIs in iou are safe, and many of the safety issues in using
io_uring are completely resolved. In particular, the liburing library which iou
is based on correctly implements the atomics necessary to coordinate with the
kernel across the io_uring interface. However, some key interfaces remain
unsafe. In particular, preparing IO events to be submitted to the io_uring is
not safe: users must ensure that the buffers and file descriptors are regarded
as borrowed during the lifetime of the IO.
Kernel support
In order to use io_uring, the machine you are running your code on must have a
kernel which supports that interface. The first version of io_uring was added
in Linux 5.1, but it did not include all of the features supported by this
library. Some features of this library may not work depending on which version
of Linux you are using.