1 files changed, 86 insertions, 0 deletions
diff --git a/src/eager_unix.rs b/src/eager_unix.rs
new file mode 100644
index 000000000..8646e2b23
--- /dev/null
+++ b/src/eager_unix.rs
@@ -0,0 +1,86 @@
+// Copyright 2018 the Deno authors. All rights reserved. MIT license.
+
+use resources::{EagerAccept, EagerRead, EagerWrite, Resource};
+use tokio_util;
+use tokio_write;
+
+use futures::future::{self, Either};
+use std;
+use std::io::{ErrorKind, Read, Write};
+use std::os::unix::io::{AsRawFd, FromRawFd, IntoRawFd};
+use tokio;
+use tokio::net::{TcpListener, TcpStream};
+use tokio_io;
+
+pub fn tcp_read<T: AsMut<[u8]>>(
+  tcp_stream: &TcpStream,
+  resource: Resource,
+  mut buf: T,
+) -> EagerRead<Resource, T> {
+  // Unforunately we can't just call read() on tokio::net::TcpStream
+  let fd = (*tcp_stream).as_raw_fd();
+  let mut std_tcp_stream = unsafe { std::net::TcpStream::from_raw_fd(fd) };
+  let read_result = std_tcp_stream.read(buf.as_mut());
+  // std_tcp_stream will close when it gets dropped. Thus...
+  let _ = std_tcp_stream.into_raw_fd();
+  match read_result {
+    Ok(nread) => Either::B(future::ok((resource, buf, nread))),
+    Err(err) => {
+      if err.kind() == ErrorKind::WouldBlock {
+        Either::A(tokio_io::io::read(resource, buf))
+      } else {
+        Either::B(future::err(err))
+      }
+    }
+  }
+}
+
+pub fn tcp_write<T: AsRef<[u8]>>(
+  tcp_stream: &TcpStream,
+  resource: Resource,
+  buf: T,
+) -> EagerWrite<Resource, T> {
+  let fd = (*tcp_stream).as_raw_fd();
+  let mut std_tcp_stream = unsafe { std::net::TcpStream::from_raw_fd(fd) };
+  let write_result = std_tcp_stream.write(buf.as_ref());
+  // std_tcp_stream will close when it gets dropped. Thus...
+  let _ = std_tcp_stream.into_raw_fd();
+  match write_result {
+    Ok(nwrite) => Either::B(future::ok((resource, buf, nwrite))),
+    Err(err) => {
+      if err.kind() == ErrorKind::WouldBlock {
+        Either::A(tokio_write::write(resource, buf))
+      } else {
+        Either::B(future::err(err))
+      }
+    }
+  }
+}
+
+pub fn tcp_accept(
+  tcp_listener: &TcpListener,
+  resource: Resource,
+) -> EagerAccept {
+  let fd = (*tcp_listener).as_raw_fd();
+  let std_listener = unsafe { std::net::TcpListener::from_raw_fd(fd) };
+  let result = std_listener.accept();
+  // std_listener will close when it gets dropped. Thus...
+  let _ = std_listener.into_raw_fd();
+  match result {
+    Ok((std_stream, addr)) => {
+      let result = tokio::net::TcpStream::from_std(
+        std_stream,
+        &tokio::reactor::Handle::default(),
+      );
+      let tokio_stream = result.unwrap();
+      Either::B(future::ok((tokio_stream, addr)))
+    }
+    Err(err) => {
+      if err.kind() == ErrorKind::WouldBlock {
+        Either::A(tokio_util::accept(resource))
+      } else {
+        Either::B(future::err(err))
+      }
+    }
+  }
+}