From fd91ff3ee92149ed9087f4d4351cc40102b00803 Mon Sep 17 00:00:00 2001
From: Masayuki Nakano <masayuki@d-toybox.com>
Date: Sat, 22 Dec 2012 00:07:08 +0900
Subject: [PATCH] Bug 823369 Check mozilla::widget::EventFlags size at compile
 time r=smaug

---
 widget/nsGUIEvent.h | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/widget/nsGUIEvent.h b/widget/nsGUIEvent.h
index e123b1ff4354..2f85f4714606 100644
--- a/widget/nsGUIEvent.h
+++ b/widget/nsGUIEvent.h
@@ -564,13 +564,17 @@ public:
   }
 
 private:
-  inline void SetRawFlags(uint32_t aRawFlags)
+  typedef uint32_t RawFlags;
+
+  inline void SetRawFlags(RawFlags aRawFlags)
   {
+    MOZ_STATIC_ASSERT(sizeof(EventFlags) <= sizeof(RawFlags),
+      "mozilla::widget::EventFlags must not be bigger than the RawFlags");
     memcpy(this, &aRawFlags, sizeof(EventFlags));
   }
-  inline uint32_t GetRawFlags() const
+  inline RawFlags GetRawFlags() const
   {
-    uint32_t result = 0;
+    RawFlags result = 0;
     memcpy(&result, this, sizeof(EventFlags));
     return result;
   }