示例: public boost::log::sinks::basic_formatted_sink_backend < boost::log::sinks::synchronized_feeding{ buffering_sink_backend(std::stringformattedMessage; std::string &_buffer;
type
result = fcntl(*fd, F_SETFL, s);
perror("setting SYNC");{ if((s & O_SYNC) == O_SYNC) // check if SYNC bit is set
printf("In function buffering_off(): Buf