Upgrade libuv to the current master + our patches

There were two main differences with the old libuv and the master version:

1. The uv_last_error function is now gone. The error code returned by each
   function is the "last error" so now a UvError is just a wrapper around a
   c_int.
2. The repo no longer includes a makefile, and the build system has change.
   According to the build directions on joyent/libuv, this now downloads a `gyp`
   program into the `libuv/build` directory and builds using that. This
   shouldn't add any dependences on autotools or anything like that.

Closes #8407
Closes #6567
Closes #6315

4 files changed, 45 insertions, 83 deletions

diff --git a/src/libstd/rt/io/net/tcp.rs b/src/libstd/rt/io/net/tcp.rs
index 9be5540de48..85fb5d08848 100644
--- a/src/libstd/rt/io/net/tcp.rs
+++ b/src/libstd/rt/io/net/tcp.rs
@@ -166,7 +166,7 @@ mod test {
         do run_in_newsched_task {
             let mut called = false;
             do io_error::cond.trap(|e| {
-                assert!(e.kind == ConnectionRefused);
+                assert_eq!(e.kind, ConnectionRefused);
                 called = true;
             }).inside {
                 let addr = SocketAddr { ip: Ipv4Addr(0, 0, 0, 0), port: 1 };
diff --git a/src/libstd/rt/uv/mod.rs b/src/libstd/rt/uv/mod.rs
index 75b9a5ac553..5a592b92a38 100644
--- a/src/libstd/rt/uv/mod.rs
+++ b/src/libstd/rt/uv/mod.rs
@@ -202,12 +202,12 @@ impl<H, W: Watcher + NativeHandle<*H>> WatcherInterop for W {
 // XXX: Need to define the error constants like EOF so they can be
 // compared to the UvError type
 
-pub struct UvError(uvll::uv_err_t);
+pub struct UvError(c_int);
 
 impl UvError {
     pub fn name(&self) -> ~str {
         unsafe {
-            let inner = match self { &UvError(ref a) => a };
+            let inner = match self { &UvError(a) => a };
             let name_str = uvll::err_name(inner);
             assert!(name_str.is_not_null());
             from_c_str(name_str)
@@ -216,7 +216,7 @@ impl UvError {
 
     pub fn desc(&self) -> ~str {
         unsafe {
-            let inner = match self { &UvError(ref a) => a };
+            let inner = match self { &UvError(a) => a };
             let desc_str = uvll::strerror(inner);
             assert!(desc_str.is_not_null());
             from_c_str(desc_str)
@@ -224,7 +224,7 @@ impl UvError {
     }
 
     pub fn is_eof(&self) -> bool {
-        self.code == uvll::EOF
+        **self == uvll::EOF
     }
 }
 
@@ -236,18 +236,10 @@ impl ToStr for UvError {
 
 #[test]
 fn error_smoke_test() {
-    let err = uvll::uv_err_t { code: 1, sys_errno_: 1 };
-    let err: UvError = UvError(err);
+    let err: UvError = UvError(uvll::EOF);
     assert_eq!(err.to_str(), ~"EOF: end of file");
 }
 
-pub fn last_uv_error<H, W: Watcher + NativeHandle<*H>>(watcher: &W) -> UvError {
-    unsafe {
-        let loop_ = watcher.event_loop();
-        UvError(uvll::last_error(loop_.native_handle()))
-    }
-}
-
 pub fn uv_error_to_io_error(uverr: UvError) -> IoError {
     unsafe {
         // Importing error constants
@@ -255,10 +247,10 @@ pub fn uv_error_to_io_error(uverr: UvError) -> IoError {
         use rt::io::*;
 
         // uv error descriptions are static
-        let c_desc = uvll::strerror(&*uverr);
+        let c_desc = uvll::strerror(*uverr);
         let desc = str::raw::c_str_to_static_slice(c_desc);
 
-        let kind = match uverr.code {
+        let kind = match *uverr {
             UNKNOWN => OtherIoError,
             OK => OtherIoError,
             EOF => EndOfFile,
@@ -266,8 +258,8 @@ pub fn uv_error_to_io_error(uverr: UvError) -> IoError {
             ECONNREFUSED => ConnectionRefused,
             ECONNRESET => ConnectionReset,
             EPIPE => BrokenPipe,
-            _ => {
-                rtdebug!("uverr.code %u", uverr.code as uint);
+            err => {
+                rtdebug!("uverr.code %d", err as int);
                 // XXX: Need to map remaining uv error types
                 OtherIoError
             }
@@ -282,30 +274,13 @@ pub fn uv_error_to_io_error(uverr: UvError) -> IoError {
 }
 
 /// Given a uv handle, convert a callback status to a UvError
-pub fn status_to_maybe_uv_error_with_loop(
-    loop_: *uvll::uv_loop_t,
-    status: c_int) -> Option<UvError> {
-    if status != -1 {
+pub fn status_to_maybe_uv_error<T, U: Watcher + NativeHandle<*T>>(
+    handle: U, status: c_int) -> Option<UvError>
+{
+    if status >= 0 {
         None
     } else {
-        unsafe {
-            rtdebug!("loop: %x", loop_ as uint);
-            let err = uvll::last_error(loop_);
-            Some(UvError(err))
-        }
-    }
-}
-/// Given a uv handle, convert a callback status to a UvError
-pub fn status_to_maybe_uv_error<T, U: Watcher + NativeHandle<*T>>(handle: U,
-                                                                 status: c_int) -> Option<UvError> {
-    if status != -1 {
-        None
-    } else {
-        unsafe {
-            rtdebug!("handle: %x", handle.native_handle() as uint);
-            let loop_ = uvll::get_loop_for_uv_handle(handle.native_handle());
-            status_to_maybe_uv_error_with_loop(loop_, status)
-        }
+        Some(UvError(status))
     }
 }
 
diff --git a/src/libstd/rt/uv/net.rs b/src/libstd/rt/uv/net.rs
index e8d0296e543..bb3a00ca243 100644
--- a/src/libstd/rt/uv/net.rs
+++ b/src/libstd/rt/uv/net.rs
@@ -16,7 +16,6 @@ use rt::uv::{AllocCallback, ConnectionCallback, ReadCallback, UdpReceiveCallback
 use rt::uv::{Loop, Watcher, Request, UvError, Buf, NativeHandle, NullCallback,
              status_to_maybe_uv_error};
 use rt::io::net::ip::{SocketAddr, Ipv4Addr, Ipv6Addr};
-use rt::uv::last_uv_error;
 use vec;
 use str;
 use from_str::{FromStr};
@@ -232,7 +231,7 @@ impl TcpWatcher {
             };
             match result {
                 0 => Ok(()),
-                _ => Err(last_uv_error(self)),
+                _ => Err(UvError(result)),
             }
         }
     }
@@ -327,7 +326,7 @@ impl UdpWatcher {
             };
             match result {
                 0 => Ok(()),
-                _ => Err(last_uv_error(self)),
+                _ => Err(UvError(result)),
             }
         }
     }
diff --git a/src/libstd/rt/uv/uvll.rs b/src/libstd/rt/uv/uvll.rs
index 1e189e90885..00c2974cb54 100644
--- a/src/libstd/rt/uv/uvll.rs
+++ b/src/libstd/rt/uv/uvll.rs
@@ -37,21 +37,34 @@ use libc::{malloc, free};
 use libc;
 use prelude::*;
 use ptr;
-use str;
 use vec;
 
-pub static UNKNOWN: c_int = -1;
+pub use self::errors::*;
+
 pub static OK: c_int = 0;
-pub static EOF: c_int = 1;
-pub static EADDRINFO: c_int = 2;
-pub static EACCES: c_int = 3;
-pub static ECONNREFUSED: c_int = 12;
-pub static ECONNRESET: c_int = 13;
-pub static EPIPE: c_int = 36;
+pub static EOF: c_int = -4095;
+pub static UNKNOWN: c_int = -4094;
+
+// uv-errno.h redefines error codes for windows, but not for unix...
 
-pub struct uv_err_t {
-    code: c_int,
-    sys_errno_: c_int
+#[cfg(windows)]
+pub mod errors {
+    use libc::c_int;
+
+    pub static EACCES: c_int = -4093;
+    pub static ECONNREFUSED: c_int = -4079;
+    pub static ECONNRESET: c_int = -4078;
+    pub static EPIPE: c_int = -4048;
+}
+#[cfg(not(windows))]
+pub mod errors {
+    use libc;
+    use libc::c_int;
+
+    pub static EACCES: c_int = -libc::EACCES;
+    pub static ECONNREFUSED: c_int = -libc::ECONNREFUSED;
+    pub static ECONNRESET: c_int = -libc::ECONNRESET;
+    pub static EPIPE: c_int = -libc::EPIPE;
 }
 
 pub struct uv_buf_t {
@@ -487,20 +500,12 @@ pub unsafe fn read_stop(stream: *uv_stream_t) -> c_int {
     return rust_uv_read_stop(stream as *c_void);
 }
 
-pub unsafe fn last_error(loop_handle: *c_void) -> uv_err_t {
-    #[fixed_stack_segment]; #[inline(never)];
-
-    return rust_uv_last_error(loop_handle);
-}
-
-pub unsafe fn strerror(err: *uv_err_t) -> *c_char {
+pub unsafe fn strerror(err: c_int) -> *c_char {
     #[fixed_stack_segment]; #[inline(never)];
-
     return rust_uv_strerror(err);
 }
-pub unsafe fn err_name(err: *uv_err_t) -> *c_char {
+pub unsafe fn err_name(err: c_int) -> *c_char {
     #[fixed_stack_segment]; #[inline(never)];
-
     return rust_uv_err_name(err);
 }
 
@@ -720,22 +725,6 @@ pub unsafe fn get_len_from_buf(buf: uv_buf_t) -> size_t {
 
     return rust_uv_get_len_from_buf(buf);
 }
-pub unsafe fn get_last_err_info(uv_loop: *c_void) -> ~str {
-    let err = last_error(uv_loop);
-    let err_ptr = ptr::to_unsafe_ptr(&err);
-    let err_name = str::raw::from_c_str(err_name(err_ptr));
-    let err_msg = str::raw::from_c_str(strerror(err_ptr));
-    return fmt!("LIBUV ERROR: name: %s msg: %s",
-                    err_name, err_msg);
-}
-
-pub unsafe fn get_last_err_data(uv_loop: *c_void) -> uv_err_data {
-    let err = last_error(uv_loop);
-    let err_ptr = ptr::to_unsafe_ptr(&err);
-    let err_name = str::raw::from_c_str(err_name(err_ptr));
-    let err_msg = str::raw::from_c_str(strerror(err_ptr));
-    uv_err_data { err_name: err_name, err_msg: err_msg }
-}
 
 pub struct uv_err_data {
     err_name: ~str,
@@ -768,9 +757,8 @@ extern {
                           cb: uv_async_cb) -> c_int;
     fn rust_uv_tcp_init(loop_handle: *c_void, handle_ptr: *uv_tcp_t) -> c_int;
     fn rust_uv_buf_init(out_buf: *uv_buf_t, base: *u8, len: size_t);
-    fn rust_uv_last_error(loop_handle: *c_void) -> uv_err_t;
-    fn rust_uv_strerror(err: *uv_err_t) -> *c_char;
-    fn rust_uv_err_name(err: *uv_err_t) -> *c_char;
+    fn rust_uv_strerror(err: c_int) -> *c_char;
+    fn rust_uv_err_name(err: c_int) -> *c_char;
     fn rust_uv_ip4_addrp(ip: *u8, port: c_int) -> *sockaddr_in;
     fn rust_uv_ip6_addrp(ip: *u8, port: c_int) -> *sockaddr_in6;
     fn rust_uv_free_ip4_addr(addr: *sockaddr_in);