Sometimes you want a threaded logger. Sometimes you want it to come in two flavors, locked and lock-free. Do I have excellent news for you, friend! Usage is simple:
#include <llog/llog.h>
int main(int argc, char* argv[])
{
typedef llog::logger<> logger_t;
logger_t logger;
logger.start();
logger(_I("This is an informational"));
logger(_W("This is a warning"));
logger(_P("Uh-oh, panic!"));
}The above usage example will instantiate a locked logger which operates on std::string. Lets say, for some crazy reason, you think you need it to be lockfree:
#include <llog/llog.h>
int main(int argc, char* argv[])
{
typedef llog::logger<
std::string
, llog::detail::lockfree_queue_adapter<std::string>
> logger_t;
logger_t logger;
logger.start();
logger(_I("This is an informational"));
}
Since this is merely a wrapper around an std::ostream, the default stream is std::cout. It is the responsibility of the consumer to open a file and provide a stream (via logger.rebind(&stream)). Rebind is not thread safe, so one needs to call ::stop(), ::rebind(...), and ::start().
Llog was compiled using g++ 4.4.6 and boost 1.49. The two referenced submodules are not yet part of boost (as of 20121022), but are available in their respective repos.