once_block.hpp File Reference

The header defines classes and macros for once-blocks. More...

#include <boost/log/detail/config.hpp>
#include <boost/log/utility/unique_identifier_name.hpp>
#include <boost/log/detail/header.hpp>
#include <boost/log/detail/footer.hpp>

Include dependency graph for once_block.hpp:

This graph shows which files directly or indirectly include this file:

Classes
struct	boost::once_block_flag
	A flag to detect if a code block has already been executed. More...
class	boost::aux::once_block_sentry

Namespaces
	boost
	Duration formatting facet for input.
	boost::aux

Macros
#define	BOOST_LOG_ONCE_BLOCK_INIT   { boost::log::once_block_flag::uninitialized }
#define	BOOST_LOG_ONCE_BLOCK_FLAG_INTERNAL(flag_var, sentry_var)
#define	BOOST_LOG_ONCE_BLOCK_INTERNAL(flag_var, sentry_var)
#define	BOOST_LOG_ONCE_BLOCK_FLAG(flag_var)
#define	BOOST_LOG_ONCE_BLOCK()

Detailed Description

The header defines classes and macros for once-blocks.

Author

Andrey Semashev

Date

23.06.2010

Macro Definition Documentation

#define BOOST_LOG_ONCE_BLOCK

(

)

Value:

BOOST_LOG_ONCE_BLOCK_INTERNAL(\
        BOOST_LOG_UNIQUE_IDENTIFIER_NAME(_boost_log_once_block_flag_),\
        BOOST_LOG_UNIQUE_IDENTIFIER_NAME(_boost_log_once_block_sentry_))

#define BOOST_LOG_ONCE_BLOCK_FLAG

(

flag_var

)

Value:

BOOST_LOG_ONCE_BLOCK_FLAG_INTERNAL(\
        flag_var,\
        BOOST_LOG_UNIQUE_IDENTIFIER_NAME(_boost_log_once_block_sentry_))

#define BOOST_LOG_ONCE_BLOCK_FLAG_INTERNAL	(		flag_var,
			sentry_var
	)

Value:

for (boost::log::aux::once_block_sentry sentry_var((flag_var));\
        BOOST_UNLIKELY(!sentry_var.executed()); sentry_var.commit())

#define BOOST_LOG_ONCE_BLOCK_INIT   { boost::log::once_block_flag::uninitialized }

#define BOOST_LOG_ONCE_BLOCK_INTERNAL	(		flag_var,
			sentry_var
	)

Value:

static boost::log::once_block_flag flag_var;\
    BOOST_LOG_ONCE_BLOCK_FLAG_INTERNAL(flag_var, sentry_var)