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use std::{
cell::UnsafeCell,
convert::TryFrom,
fs::File,
io,
net::{TcpListener, TcpStream},
ops::Neg,
os::unix::io::{AsRawFd, FromRawFd},
sync::{
atomic::{
AtomicU32, AtomicU64,
Ordering::{Acquire, Relaxed, Release},
},
Arc, Condvar, Mutex,
},
};
use super::{
pair, AsIoVec, AsIoVecMut, Completion, Filler, FromCqe,
Measure, M,
};
mod config;
mod constants;
mod cq;
mod in_flight;
mod kernel_types;
mod sq;
mod syscall;
mod ticket_queue;
mod uring;
pub(crate) use {
constants::*,
cq::Cq,
in_flight::InFlight,
kernel_types::{
io_uring_cqe, io_uring_params, io_uring_sqe,
},
sq::Sq,
syscall::{enter, setup},
ticket_queue::TicketQueue,
};
pub use {
config::Config,
uring::{Rio, Uring},
};
#[derive(Clone, Debug, Copy)]
pub enum Ordering {
None,
Link,
Drain,
}
fn uring_mmap(
size: usize,
ring_fd: i32,
offset: i64,
) -> io::Result<*mut libc::c_void> {
#[allow(unsafe_code)]
let ptr = unsafe {
libc::mmap(
std::ptr::null_mut(),
size,
libc::PROT_READ | libc::PROT_WRITE,
libc::MAP_SHARED | libc::MAP_POPULATE,
ring_fd,
offset,
)
};
if ptr.is_null() || ptr == libc::MAP_FAILED {
let mut err = io::Error::last_os_error();
if let Some(12) = err.raw_os_error() {
err = io::Error::new(
io::ErrorKind::Other,
"Not enough lockable memory. You probably \
need to raise the memlock rlimit, which \
often defaults to a pretty low number.",
);
}
return Err(err);
}
Ok(ptr)
}
impl FromCqe for TcpStream {
fn from_cqe(cqe: io_uring_cqe) -> TcpStream {
#[allow(unsafe_code)]
unsafe {
TcpStream::from_raw_fd(cqe.res)
}
}
}