diff -r 000000000000 -r 6474c204b198 nsprpub/pr/src/cplus/rcbase.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/nsprpub/pr/src/cplus/rcbase.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,51 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+** RCBase.h - Mixin class for NSPR C++ wrappers
+*/
+
+#if defined(_RCRUNTIME_H)
+#else
+#define _RCRUNTIME_H
+
+#include <prerror.h>
+
+/*
+** Class: RCBase (mixin)
+**
+** Generally mixed into every base class. The functions in this class are all
+** static. Therefore this entire class is just syntatic sugar. It gives the
+** illusion that errors (in particular) are retrieved via the same object
+** that just reported a failure. It also (unfortunately) might lead one to
+** believe that the errors are persistent in that object. They're not.
+*/
+
+class PR_IMPLEMENT(RCBase)
+{
+public:
+    virtual ~RCBase();
+
+    static void AbortSelf();
+
+    static PRErrorCode GetError();
+    static PRInt32 GetOSError();
+
+    static PRSize GetErrorTextLength();
+    static PRSize CopyErrorText(char *text);
+
+    static void SetError(PRErrorCode error, PRInt32 oserror);
+    static void SetErrorText(PRSize textLength, const char *text);
+
+protected:
+    RCBase() { }
+};  /* RCObject */
+
+inline PRErrorCode RCBase::GetError() { return PR_GetError(); }
+inline PRInt32 RCBase::GetOSError() { return PR_GetOSError(); }
+
+#endif  /* defined(_RCRUNTIME_H) */
+
+/* rcbase.h */