refs #522, mutex for mutable members (thread safe)

* copy/assignment/lock for mutable members
* also removed redundant in status message (slack discussion MS/KB)

src/blackmisc/statusexception.cpp

@@ -0,0 +1,30 @@
+/* Copyright (C) 2015
+ * swift project Community / Contributors
+ *
+ * This file is part of Swift Project. It is subject to the license terms in the LICENSE file found in the top-level
+ * directory of this distribution and at http://www.swift-project.org/license.html. No part of swift project,
+ * including this file, may be copied, modified, propagated, or distributed except according to the terms
+ * contained in the LICENSE file.
+ */
+
+#include "statusexception.h"
+
+namespace BlackMisc
+{
+    CStatusException::CStatusException(const CStatusMessage &payload) :
+        m_payload(payload)
+    {}
+
+    CStatusException::CStatusException(const CStatusException &other) : std::exception(other)
+    {
+        QReadLocker lock(&other.m_lock);
+        this->m_temp = other.m_temp;
+    }
+
+    const char *CStatusException::what() const Q_DECL_NOEXCEPT
+    {
+        QWriteLocker lock(&this->m_lock);
+        if (m_temp.isNull()) { m_temp = m_payload.getMessage().toLocal8Bit(); }
+        return m_temp;
+    }
+} // ns