Auto merge of #38707 - redox-os:master, r=brson

Add socket timeout and ttl support in `sys::redox`

This adds support for `read_timeout`, `write_timeout`, and `ttl` on `TcpStream`, `TcpListener`, and `UdpSocket` in the `sys::redox` module.

The DNS lookup has been set to use a 5 second timeout by default.

1 files changed, 19 insertions, 0 deletions

diff --git a/src/libstd/sys/redox/syscall/data.rs b/src/libstd/sys/redox/syscall/data.rs
index ac3946672a3..a6b0ada72b8 100644
--- a/src/libstd/sys/redox/syscall/data.rs
+++ b/src/libstd/sys/redox/syscall/data.rs
@@ -84,3 +84,22 @@ pub struct TimeSpec {
     pub tv_sec: i64,
     pub tv_nsec: i32,
 }
+
+impl Deref for TimeSpec {
+    type Target = [u8];
+    fn deref(&self) -> &[u8] {
+        unsafe {
+            slice::from_raw_parts(self as *const TimeSpec as *const u8,
+                                  mem::size_of::<TimeSpec>()) as &[u8]
+        }
+    }
+}
+
+impl DerefMut for TimeSpec {
+    fn deref_mut(&mut self) -> &mut [u8] {
+        unsafe {
+            slice::from_raw_parts_mut(self as *mut TimeSpec as *mut u8,
+                                      mem::size_of::<TimeSpec>()) as &mut [u8]
+        }
+    }
+}