From 3144b61ccc2ec024c19ccb41ff6964a86203ee14 Mon Sep 17 00:00:00 2001
From: Vincent Ambo <tazjin@gmail.com>
Date: Mon, 16 Oct 2017 02:00:32 +0200
Subject: [PATCH] feat(lib): Implement Drop trait for Queue

Implements the Drop trait to take care of closing the queue descriptor
when a Queue instance is dropped.
---
 src/lib.rs | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/lib.rs b/src/lib.rs
index 475b2c0f4..cc3939d94 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -9,6 +9,7 @@ use std::ffi::CString;
 use std::fs::File;
 use std::io::Read;
 use std::string::ToString;
+use std::ops::Drop;
 
 mod error;
 
@@ -220,6 +221,15 @@ impl Queue {
     }
 }
 
+impl Drop for Queue {
+    fn drop(&mut self) {
+        // Attempt to close the queue descriptor and discard any possible errors.
+        // The only error thrown in the C-code is EINVAL, which would mean that the
+        // descriptor has already been closed.
+        mqueue::mq_close(self.queue_descriptor).ok();
+    }
+}
+
 // Creates the default queue mode (0600).
 fn default_mode() -> stat::Mode {
     let mut mode = stat::Mode::empty();