Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
boost::log::once_block_flag — A flag to detect if a code block has already been executed.
// In header: <boost/log/utility/once_block.hpp> struct once_block_flag { };
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!"); } }