Add JoinHandleExt to get the pthread_t on unix platforms

Signed-off-by: Peter Atashian <[email protected]>

Author: retep998

src/libstd/sys/unix/ext/mod.rs

@@ -34,6 +34,7 @@ pub mod ffi;
 pub mod fs;
 pub mod process;
 pub mod raw;
+pub mod thread;
 
 /// A prelude for conveniently writing platform-specific code.
 ///

src/libstd/sys/unix/ext/raw.rs

@@ -15,6 +15,8 @@
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type uid_t = u32;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type gid_t = u32;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type pid_t = i32;
+#[unstable(feature = "pthread_t", issue = "0")]
+pub type pthread_t = usize;
 
 #[doc(inline)]
 pub use sys::platform::raw::{dev_t, ino_t, mode_t, nlink_t, off_t, blksize_t};

src/libstd/sys/unix/ext/thread.rs

@@ -0,0 +1,40 @@
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+//! Unix-specific extensions to primitives in the `std::process` module.
+
+use os::unix::raw::{pthread_t};
+use sys_common::{AsInner, IntoInner};
+use thread::{JoinHandle};
+
+#[unstable(feature = "thread_extensions", issue = "0")]
+pub type RawId = pthread_t;
+
+/// Unix-specific extensions to `std::thread::JoinHandle`
+#[unstable(feature = "thread_extensions", issue = "0")]
+pub trait JoinHandleExt {
+    /// Extracts the raw pthread_t without taking ownership
+    fn as_pthread_t(&self) -> RawId;
+    /// Consumes the thread, returning the raw pthread_t
+    ///
+    /// This function **transfers ownership** of the underlying pthread_t to
+    /// the caller. Callers are then the unique owners of the pthread_t and
+    /// must either detech or join the pthread_t once it's no longer needed.
+    fn into_pthread_t(self) -> RawId;
+}
+
+impl<T> JoinHandleExt for JoinHandle<T> {
+    fn as_pthread_t(&self) -> RawId {
+        self.as_inner().id() as RawId
+    }
+    fn into_pthread_t(self) -> RawId {
+        self.into_inner().into_id() as RawId
+    }
+}

src/libstd/sys/unix/thread.rs

@@ -167,6 +167,14 @@ impl Thread {
             debug_assert_eq!(ret, 0);
         }
     }
+
+    pub fn id(&self) -> libc::pthread_t { self.id }
+
+    pub fn into_id(self) -> libc::pthread_t {
+        let id = self.id;
+        mem::forget(self);
+        id
+    }
 }
 
 impl Drop for Thread {