2 files changed, 16 insertions, 0 deletions
diff --git a/src/libstd/sys/windows/c.rs b/src/libstd/sys/windows/c.rs
index 910d802f059..dc7b2fc9a6b 100644
--- a/src/libstd/sys/windows/c.rs
+++ b/src/libstd/sys/windows/c.rs
@@ -265,6 +265,7 @@ pub const FILE_CURRENT: DWORD = 1;
 pub const FILE_END: DWORD = 2;
 
 pub const WAIT_OBJECT_0: DWORD = 0x00000000;
+pub const WAIT_TIMEOUT: DWORD = 258;
 
 #[cfg(target_env = "msvc")]
 pub const MAX_SYM_NAME: usize = 2000;
diff --git a/src/libstd/sys/windows/process.rs b/src/libstd/sys/windows/process.rs
index 7dc8959e1b6..d2ad81023e7 100644
--- a/src/libstd/sys/windows/process.rs
+++ b/src/libstd/sys/windows/process.rs
@@ -340,6 +340,21 @@ impl Process {
         }
     }
 
+    pub fn try_wait(&mut self) -> io::Result<ExitStatus> {
+        unsafe {
+            match c::WaitForSingleObject(self.handle.raw(), 0) {
+                c::WAIT_OBJECT_0 => {}
+                c::WAIT_TIMEOUT => {
+                    return Err(io::Error::from_raw_os_error(c::WSAEWOULDBLOCK))
+                }
+                _ => return Err(io::Error::last_os_error()),
+            }
+            let mut status = 0;
+            cvt(c::GetExitCodeProcess(self.handle.raw(), &mut status))?;
+            Ok(ExitStatus(status))
+        }
+    }
+
     pub fn handle(&self) -> &Handle { &self.handle }
 
     pub fn into_handle(self) -> Handle { self.handle }