Add Event::duplicate

1 files changed, 22 insertions, 2 deletions

diff --git a/talpid-windows/src/sync.rs b/talpid-windows/src/sync.rs
index 202c96524d..7b4ed59be3 100644
--- a/talpid-windows/src/sync.rs
+++ b/talpid-windows/src/sync.rs
@@ -1,7 +1,7 @@
 use std::{io, ptr};
 use windows_sys::Win32::{
-    Foundation::{CloseHandle, BOOL, HANDLE},
-    System::Threading::{CreateEventW, SetEvent},
+    Foundation::{CloseHandle, DuplicateHandle, BOOL, DUPLICATE_SAME_ACCESS, HANDLE},
+    System::Threading::{CreateEventW, GetCurrentProcess, SetEvent},
 };
 
 /// Windows event object
@@ -39,6 +39,26 @@ impl Event {
     pub fn as_raw(&self) -> HANDLE {
         self.0
     }
+
+    /// Duplicate the event object with `DuplicateHandle()`
+    pub fn duplicate(&self) -> io::Result<Event> {
+        let mut new_event = 0;
+        let status = unsafe {
+            DuplicateHandle(
+                GetCurrentProcess(),
+                self.0,
+                GetCurrentProcess(),
+                &mut new_event,
+                0,
+                0,
+                DUPLICATE_SAME_ACCESS,
+            )
+        };
+        if status == 0 {
+            return Err(io::Error::last_os_error());
+        }
+        Ok(Event(new_event))
+    }
 }
 
 impl Drop for Event {