1 files changed, 39 insertions, 0 deletions
diff --git a/third_party/rust/d3d12/src/sync.rs b/third_party/rust/d3d12/src/sync.rs
new file mode 100644
index 0000000000..f1f3bb9bca
--- /dev/null
+++ b/third_party/rust/d3d12/src/sync.rs
@@ -0,0 +1,39 @@
+use crate::{com::WeakPtr, HRESULT};
+use std::ptr;
+use winapi::um::{d3d12, synchapi, winnt};
+
+#[derive(Copy, Clone)]
+#[repr(transparent)]
+pub struct Event(pub winnt::HANDLE);
+impl Event {
+    pub fn create(manual_reset: bool, initial_state: bool) -> Self {
+        Event(unsafe {
+            synchapi::CreateEventA(
+                ptr::null_mut(),
+                manual_reset as _,
+                initial_state as _,
+                ptr::null(),
+            )
+        })
+    }
+
+    // TODO: return value
+    pub fn wait(&self, timeout_ms: u32) -> u32 {
+        unsafe { synchapi::WaitForSingleObject(self.0, timeout_ms) }
+    }
+}
+
+pub type Fence = WeakPtr<d3d12::ID3D12Fence>;
+impl Fence {
+    pub fn set_event_on_completion(&self, event: Event, value: u64) -> HRESULT {
+        unsafe { self.SetEventOnCompletion(value, event.0) }
+    }
+
+    pub fn get_value(&self) -> u64 {
+        unsafe { self.GetCompletedValue() }
+    }
+
+    pub fn signal(&self, value: u64) -> HRESULT {
+        unsafe { self.Signal(value) }
+    }
+}