oflog/include/dcmtk/oflog/ndc.h

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// Module:  Log4CPLUS
// File:    ndc.h
// Created: 6/2001
// Author:  Tad E. Smith
//
//
// Copyright 2001-2009 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.

#ifndef _LO4CPLUS_NDC_HEADER_
#define _LO4CPLUS_NDC_HEADER_

#include "dcmtk/oflog/config.h"
#include "dcmtk/oflog/tstring.h"
#include "dcmtk/oflog/helpers/lloguser.h"
#include "dcmtk/oflog/helpers/threads.h"

//#include <map>
//#include <stack>
#include "dcmtk/ofstd/ofstack.h"

#if (defined(__MWERKS__) && defined(__MACOS__))
using STD_NAMESPACE size_t;
#endif


namespace log4cplus {
    // Forward declarations
    class NDC;
    struct DiagnosticContext;
    typedef OFStack<DiagnosticContext> DiagnosticContextStack;

#if defined (_MSC_VER)
    LOG4CPLUS_EXPORT NDC& getNDC();
#endif


    class LOG4CPLUS_EXPORT NDC : protected log4cplus::helpers::LogLogUser {
    public:
        void clear();

        DiagnosticContextStack cloneStack();

        void inherit(const DiagnosticContextStack& stack);

        log4cplus::tstring get();

        size_t getDepth();

        log4cplus::tstring pop();

        log4cplus::tstring peek();

        void push(const log4cplus::tstring& message);

        void remove();

        void setMaxDepth(size_t maxDepth);

      // Dtor
        ~NDC();

    private:
      // Methods
        DiagnosticContextStack* getPtr();

      // Data
        LOG4CPLUS_THREAD_LOCAL_TYPE threadLocal;

      // Disallow construction (and copying) except by getNDC()
        NDC();
        NDC(const NDC&);
        NDC& operator=(const NDC&);

      // Friends
#if defined (_MSC_VER)
        friend LOG4CPLUS_EXPORT NDC& getNDC();
#else
        friend NDC& getNDC();
#endif
    };


    LOG4CPLUS_EXPORT NDC& getNDC();


    struct LOG4CPLUS_EXPORT DiagnosticContext {
      // Ctors
        DiagnosticContext(const log4cplus::tstring& message, DiagnosticContext *parent);
        DiagnosticContext(const log4cplus::tstring& message);

      // Data
        log4cplus::tstring message; 
        log4cplus::tstring fullMessage; 
    };


    class LOG4CPLUS_EXPORT NDCContextCreator {
    public:
        NDCContextCreator(const log4cplus::tstring& msg);

        ~NDCContextCreator();
    };

} // end namespace log4cplus


#endif // _LO4CPLUS_NDC_HEADER_

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