/usr/include/boost/log/detail
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adaptive_mutex.hpp63320644editdlrm
allocator_traits.hpp25030644editdlrm
asio_fwd.hpp11030644editdlrm
attachable_sstream_buf.hpp113120644editdlrm
attribute_get_value_impl.hpp11660644editdlrm
attribute_predicate.hpp32910644editdlrm
attr_output_impl.hpp38620644editdlrm
attr_output_terminal.hpp50770644editdlrm
cleanup_scope_guard.hpp13510644editdlrm
code_conversion.hpp108960644editdlrm
config.hpp152500644editdlrm
copy_cv.hpp14030644editdlrm
custom_terminal_spec.hpp20200644editdlrm
c_str.hpp14380644editdlrm
date_time_fmt_gen_traits_fwd.hpp11130644editdlrm
date_time_format_parser.hpp187370644editdlrm
decomposed_time.hpp134990644editdlrm
deduce_char_type.hpp20970644editdlrm
default_attribute_names.hpp14280644editdlrm
embedded_string_type.hpp30020644editdlrm
enqueued_record.hpp29080644editdlrm
event.hpp42920644editdlrm
fake_mutex.hpp15160644editdlrm
footer.hpp5960644editdlrm
format.hpp108090644editdlrm
function_traits.hpp71260644editdlrm
generate_overloads.hpp8920644editdlrm
header.hpp24930644editdlrm
id.hpp20690644editdlrm
is_character_type.hpp15500644editdlrm
is_ostream.hpp15650644editdlrm
light_function.hpp146810644editdlrm
light_function_pp.hpp122580644editdlrm
light_rw_mutex.hpp38540644editdlrm
locking_ptr.hpp38850644editdlrm
locks.hpp52600644editdlrm
named_scope_fmt_pp.hpp38650644editdlrm
native_typeof.hpp14710644editdlrm
parameter_tools.hpp60450644editdlrm
pause.hpp15280644editdlrm
pp_identity.hpp7680644editdlrm
process_id.hpp14720644editdlrm
setup_config.hpp17890644editdlrm
sfinae_tools.hpp11200644editdlrm
singleton.hpp22420644editdlrm
sink_init_helpers.hpp50850644editdlrm
snprintf.hpp27160644editdlrm
tagged_integer.hpp44920644editdlrm
threadsafe_queue.hpp85500644editdlrm
thread_id.hpp15660644editdlrm
thread_specific.hpp28950644editdlrm
timestamp.hpp23270644editdlrm
trivial_keyword.hpp10830644editdlrm
unary_function_terminal.hpp43550644editdlrm
value_ref_visitation.hpp36460644editdlrm
Edit: /usr/include/boost/log/detail/singleton.hpp (2242B)
/* * Copyright Andrey Semashev 2007 - 2015. * Distributed under the Boost Software License, Version 1.0. * (See accompanying file LICENSE_1_0.txt or copy at * http://www.boost.org/LICENSE_1_0.txt) */ /*! * \file singleton.hpp * \author Andrey Semashev * \date 20.04.2008 * * \brief This header is the Boost.Log library implementation, see the library documentation * at http://www.boost.org/doc/libs/release/libs/log/doc/html/index.html. */ #ifndef BOOST_LOG_DETAIL_SINGLETON_HPP_INCLUDED_ #define BOOST_LOG_DETAIL_SINGLETON_HPP_INCLUDED_ #include #include #include #ifdef BOOST_HAS_PRAGMA_ONCE #pragma once #endif namespace boost { BOOST_LOG_OPEN_NAMESPACE namespace aux { //! A base class for singletons, constructed on-demand template< typename DerivedT, typename StorageT = DerivedT > class lazy_singleton { public: BOOST_DEFAULTED_FUNCTION(lazy_singleton(), {}) //! Returns the singleton instance static StorageT& get() { BOOST_LOG_ONCE_BLOCK() { DerivedT::init_instance(); } return get_instance(); } //! Initializes the singleton instance static void init_instance() { get_instance(); } BOOST_DELETED_FUNCTION(lazy_singleton(lazy_singleton const&)) BOOST_DELETED_FUNCTION(lazy_singleton& operator= (lazy_singleton const&)) protected: //! Returns the singleton instance (not thread-safe) static StorageT& get_instance() { static StorageT instance; return instance; } }; //! A base class for singletons, constructed on namespace scope initialization stage template< typename DerivedT, typename StorageT = DerivedT > class singleton : public lazy_singleton< DerivedT, StorageT > { public: static StorageT& instance; }; template< typename DerivedT, typename StorageT > StorageT& singleton< DerivedT, StorageT >::instance = lazy_singleton< DerivedT, StorageT >::get(); } // namespace aux BOOST_LOG_CLOSE_NAMESPACE // namespace log } // namespace boost #include #endif // BOOST_LOG_DETAIL_SINGLETON_HPP_INCLUDED_