boost::once_block_flag Struct Reference

A flag to detect if a code block has already been executed. More...

#include <once_block.hpp>

Public Types
enum	{   uninitialized = 0,   being_initialized,   initialized }

Public Attributes
unsigned char	status

Detailed Description

A flag to detect if a code block has already been executed.

This structure should be used in conjunction with the BOOST_LOG_ONCE_BLOCK_FLAG macro. Usage example:

once_block_flag flag = BOOST_LOG_ONCE_BLOCK_INIT;

void foo() { BOOST_LOG_ONCE_BLOCK_FLAG(flag) { puts("Hello, world once!"); } }

Member Enumeration Documentation

anonymous enum

Enumerator
uninitialized
being_initialized
initialized

Member Data Documentation

unsigned char boost::once_block_flag::status

Referenced by boost::aux::once_block_sentry::executed(), and boost::aux::once_block_sentry::~once_block_sentry().

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The documentation for this struct was generated from the following file:

• boost_1_57_0/boost/log/utility/once_block.hpp