ceph/src/boost/libs/log/include/boost/log/sinks/text_ostream_backend.hpp

   1 /*
   2  *          Copyright Andrey Semashev 2007 - 2015.
   3  * Distributed under the Boost Software License, Version 1.0.
   4  *    (See accompanying file LICENSE_1_0.txt or copy at
   5  *          http://www.boost.org/LICENSE_1_0.txt)
   6  */
   7 /*!
   8  * \file   text_ostream_backend.hpp
   9  * \author Andrey Semashev
  10  * \date   22.04.2007
  11  *
  12  * The header contains implementation of a text output stream sink backend.
  13  */
  14
  15 #ifndef BOOST_LOG_SINKS_TEXT_OSTREAM_BACKEND_HPP_INCLUDED_
  16 #define BOOST_LOG_SINKS_TEXT_OSTREAM_BACKEND_HPP_INCLUDED_
  17
  18 #include <ostream>
  19 #include <boost/smart_ptr/shared_ptr.hpp>
  20 #include <boost/log/detail/config.hpp>
  21 #include <boost/log/sinks/basic_sink_backend.hpp>
  22 #include <boost/log/sinks/frontend_requirements.hpp>
  23 #include <boost/log/detail/header.hpp>
  24
  25 #ifdef BOOST_HAS_PRAGMA_ONCE
  26 #pragma once
  27 #endif
  28
  29 namespace boost {
  30
  31 BOOST_LOG_OPEN_NAMESPACE
  32
  33 namespace sinks {
  34
  35 /*!
  36  * \brief An implementation of a text output stream logging sink backend
  37  *
  38  * The sink backend puts formatted log records to one or more text streams.
  39  */
  40 template< typename CharT >
  41 class basic_text_ostream_backend :
  42     public basic_formatted_sink_backend<
  43         CharT,
  44         combine_requirements< synchronized_feeding, flushing >::type
  45     >
  46 {
  47     //! Base type
  48     typedef basic_formatted_sink_backend<
  49         CharT,
  50         combine_requirements< synchronized_feeding, flushing >::type
  51     > base_type;
  52
  53 public:
  54     //! Character type
  55     typedef typename base_type::char_type char_type;
  56     //! String type to be used as a message text holder
  57     typedef typename base_type::string_type string_type;
  58     //! Output stream type
  59     typedef std::basic_ostream< char_type > stream_type;
  60
  61 private:
  62     //! \cond
  63
  64     struct implementation;
  65     implementation* m_pImpl;
  66
  67     //! \endcond
  68
  69 public:
  70     /*!
  71      * Constructor. No streams attached to the constructed backend, auto flush feature disabled.
  72      */
  73     BOOST_LOG_API basic_text_ostream_backend();
  74     /*!
  75      * Destructor
  76      */
  77     BOOST_LOG_API ~basic_text_ostream_backend();
  78
  79     /*!
  80      * The method adds a new stream to the sink.
  81      *
  82      * \param strm Pointer to the stream. Must not be NULL.
  83      */
  84     BOOST_LOG_API void add_stream(shared_ptr< stream_type > const& strm);
  85     /*!
  86      * The method removes a stream from the sink. If the stream is not attached to the sink,
  87      * the method has no effect.
  88      *
  89      * \param strm Pointer to the stream. Must not be NULL.
  90      */
  91     BOOST_LOG_API void remove_stream(shared_ptr< stream_type > const& strm);
  92
  93     /*!
  94      * Sets the flag to automatically flush buffers of all attached streams after each log record
  95      */
  96     BOOST_LOG_API void auto_flush(bool f = true);
  97
  98     /*!
  99      * The method writes the message to the sink
 100      */
 101     BOOST_LOG_API void consume(record_view const& rec, string_type const& formatted_message);
 102
 103     /*!
 104      * The method flushes the associated streams
 105      */
 106     BOOST_LOG_API void flush();
 107 };
 108
 109 #ifdef BOOST_LOG_USE_CHAR
 110 typedef basic_text_ostream_backend< char > text_ostream_backend;        //!< Convenience typedef for narrow-character logging
 111 #endif
 112 #ifdef BOOST_LOG_USE_WCHAR_T
 113 typedef basic_text_ostream_backend< wchar_t > wtext_ostream_backend;    //!< Convenience typedef for wide-character logging
 114 #endif
 115
 116 } // namespace sinks
 117
 118 BOOST_LOG_CLOSE_NAMESPACE // namespace log
 119
 120 } // namespace boost
 121
 122 #include <boost/log/detail/footer.hpp>
 123
 124 #endif // BOOST_LOG_SINKS_TEXT_OSTREAM_BACKEND_HPP_INCLUDED_