1 files changed, 32 insertions, 0 deletions
diff --git a/usb_util/src/config_descriptor.rs b/usb_util/src/config_descriptor.rs
new file mode 100644
index 0000000..37bd7d6
--- /dev/null
+++ b/usb_util/src/config_descriptor.rs
@@ -0,0 +1,32 @@
+// Copyright 2018 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+use bindings;
+use bindings::libusb_config_descriptor;
+
+/// ConfigDescriptor wraps libusb_config_descriptor.
+/// TODO(jkwang) Add utility functions to make ConfigDescriptor actually useful.
+pub struct ConfigDescriptor {
+    descriptor: *mut libusb_config_descriptor,
+}
+
+impl Drop for ConfigDescriptor {
+    // Free configuration descriptor.
+    // Safe because 'self' is intialized with a valid libusb_config_descriptor from libusb
+    // functions.
+    fn drop(&mut self) {
+        unsafe {
+            bindings::libusb_free_config_descriptor(self.descriptor);
+        }
+    }
+}
+
+impl ConfigDescriptor {
+    /// Build ConfigDescriptor. 'descriptor' should be a valid pointer from
+    /// libusb_config_descriptor. This function will panic if it's null.
+    pub unsafe fn new(descriptor: *mut libusb_config_descriptor) -> ConfigDescriptor {
+        assert!(!descriptor.is_null());
+        ConfigDescriptor { descriptor }
+    }
+}