libbinder_rs: PartialEq for ParcelFileDescriptor am: bbfe6b1232 am: 9040251850

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/1924237

Change-Id: I35280ef1d0f218d1a062bb8668fba0be50df70c8

1 files changed, 10 insertions, 0 deletions

diff --git a/libs/binder/rust/src/parcel/file_descriptor.rs b/libs/binder/rust/src/parcel/file_descriptor.rs
index b0dea945e0..4d3d59afb0 100644
--- a/libs/binder/rust/src/parcel/file_descriptor.rs
+++ b/libs/binder/rust/src/parcel/file_descriptor.rs
@@ -60,6 +60,16 @@ impl IntoRawFd for ParcelFileDescriptor {
     }
 }
 
+impl PartialEq for ParcelFileDescriptor {
+    // Since ParcelFileDescriptors own the FD, if this function ever returns true (and it is used to
+    // compare two different objects), then it would imply that an FD is double-owned.
+    fn eq(&self, other: &Self) -> bool {
+        self.as_raw_fd() == other.as_raw_fd()
+    }
+}
+
+impl Eq for ParcelFileDescriptor {}
+
 impl Serialize for ParcelFileDescriptor {
     fn serialize(&self, parcel: &mut BorrowedParcel<'_>) -> Result<()> {
         let fd = self.0.as_raw_fd();