ceph/src/boost/libs/log/example/doc/sinks_debugger.cpp

   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 #include <boost/smart_ptr/shared_ptr.hpp>
   9 #include <boost/log/core.hpp>
  10 #include <boost/log/expressions/predicates/is_debugger_present.hpp>
  11 #include <boost/log/sinks/sync_frontend.hpp>
  12 #include <boost/log/sinks/debug_output_backend.hpp>
  13 #include <boost/log/sources/logger.hpp>
  14 #include <boost/log/sources/record_ostream.hpp>
  15
  16 #if defined(BOOST_WINDOWS)
  17
  18 namespace logging = boost::log;
  19 namespace expr = boost::log::expressions;
  20 namespace src = boost::log::sources;
  21 namespace sinks = boost::log::sinks;
  22
  23 //[ example_sinks_debugger
  24 // Complete sink type
  25 typedef sinks::synchronous_sink< sinks::debug_output_backend > sink_t;
  26
  27 void init_logging()
  28 {
  29     boost::shared_ptr< logging::core > core = logging::core::get();
  30
  31     // Create the sink. The backend requires synchronization in the frontend.
  32     boost::shared_ptr< sink_t > sink(new sink_t());
  33
  34     // Set the special filter to the frontend
  35     // in order to skip the sink when no debugger is available
  36     sink->set_filter(expr::is_debugger_present());
  37
  38     core->add_sink(sink);
  39 }
  40 //]
  41
  42 int main(int, char*[])
  43 {
  44     init_logging();
  45
  46     src::logger lg;
  47     BOOST_LOG(lg) << "Hello world!";
  48
  49     return 0;
  50 }
  51
  52 #else
  53
  54 int main(int, char*[])
  55 {
  56     return 0;
  57 }
  58
  59 #endif