1 files changed, 34 insertions, 0 deletions
diff --git a/vendor/wait-timeout/src/windows.rs b/vendor/wait-timeout/src/windows.rs
new file mode 100644
index 000000000..a3aa10468
--- /dev/null
+++ b/vendor/wait-timeout/src/windows.rs
@@ -0,0 +1,34 @@
+use std::io;
+use std::os::windows::prelude::*;
+use std::process::{Child, ExitStatus};
+use std::time::Duration;
+
+type DWORD = u32;
+type HANDLE = *mut u8;
+
+const WAIT_OBJECT_0: DWORD = 0x00000000;
+const WAIT_TIMEOUT: DWORD = 258;
+
+extern "system" {
+    fn WaitForSingleObject(hHandle: HANDLE, dwMilliseconds: DWORD) -> DWORD;
+}
+
+pub fn wait_timeout(child: &mut Child, dur: Duration)
+                       -> io::Result<Option<ExitStatus>> {
+    let ms = dur.as_secs().checked_mul(1000).and_then(|amt| {
+        amt.checked_add((dur.subsec_nanos() / 1_000_000) as u64)
+    }).expect("failed to convert duration to milliseconds");
+    let ms = if ms > (DWORD::max_value() as u64) {
+        DWORD::max_value()
+    } else {
+        ms as DWORD
+    };
+    unsafe {
+        match WaitForSingleObject(child.as_raw_handle() as *mut _, ms) {
+            WAIT_OBJECT_0 => {}
+            WAIT_TIMEOUT => return Ok(None),
+            _ => return Err(io::Error::last_os_error()),
+        }
+    }
+    child.try_wait()
+}