add front demo in this project

LFtid1056/cloudfront/code/log4cplus/hierarchylocker.h

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+// -*- C++ -*-
+// Module:  Log4CPLUS
+// File:    hierarchylocker.h
+// Created: 8/2003
+// Author:  Tad E. Smith
+//
+//
+// Copyright 2003-2017 Tad E. Smith
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/** @file */
+
+#ifndef LOG4CPLUS_HIERARCHY_LOCKER_HEADER_
+#define LOG4CPLUS_HIERARCHY_LOCKER_HEADER_
+
+#include <log4cplus/config.hxx>
+
+#if defined (LOG4CPLUS_HAVE_PRAGMA_ONCE)
+#pragma once
+#endif
+
+#include <log4cplus/tstring.h>
+#include <log4cplus/appender.h>
+#include <log4cplus/logger.h>
+
+
+namespace log4cplus
+{
+
+    class Hierarchy;
+
+
+    /**
+     * This is used to lock a Hierarchy.  The dtor unlocks the Hierarchy.
+     */
+    class LOG4CPLUS_EXPORT HierarchyLocker {
+    public:
+      // ctor & dtor
+        HierarchyLocker(Hierarchy& h);
+        ~HierarchyLocker() LOG4CPLUS_NOEXCEPT_FALSE;
+
+        /**
+         * Calls the <code>resetConfiguration()</code> method on the locked Hierarchy.
+         */
+        void resetConfiguration();
+
+        /**
+         * Calls the <code>getInstance()</code> method on the locked Hierarchy.
+         */
+        Logger getInstance(const log4cplus::tstring& name);
+
+        /**
+         * Calls the <code>getInstance()</code> method on the locked Hierarchy.
+         */
+        Logger getInstance(const log4cplus::tstring& name, spi::LoggerFactory& factory);
+
+        void addAppender(Logger &logger, log4cplus::SharedAppenderPtr& appender);
+
+    private:
+      // Data
+        Hierarchy& h;
+        log4cplus::thread::MutexGuard hierarchyLocker;
+        LoggerList loggerList;
+    };
+
+} // end namespace log4cplus
+
+#endif // LOG4CPLUS_HIERARCHY_LOCKER_HEADER_