diff --git a/libs/binder/Utils.h b/libs/binder/Utils.h
index 150d520..7dcb70e 100644
--- a/libs/binder/Utils.h
+++ b/libs/binder/Utils.h
@@ -14,8 +14,9 @@
  * limitations under the License.
  */
 
-#include <cstdint>
 #include <stddef.h>
+#include <cstdint>
+#include <optional>
 
 #include <android-base/result.h>
 #include <android-base/unique_fd.h>
@@ -39,4 +40,26 @@
 
 status_t getRandomBytes(uint8_t* data, size_t size);
 
+// View of contiguous sequence. Similar to std::span.
+template <typename T>
+struct Span {
+    T* data = nullptr;
+    size_t size = 0;
+
+    size_t byteSize() { return size * sizeof(T); }
+
+    iovec toIovec() { return {const_cast<std::remove_const_t<T>*>(data), byteSize()}; }
+
+    // Truncates `this` to a length of `offset` and returns a span with the
+    // remainder.
+    //
+    // Aborts if offset > size.
+    Span<T> splitOff(size_t offset) {
+        LOG_ALWAYS_FATAL_IF(offset > size);
+        Span<T> rest = {data + offset, size - offset};
+        size = offset;
+        return rest;
+    }
+};
+
 }   // namespace android