extern int next_thread_num;
extern std::map<void *, int> instance_name_map;
extern int next_instance_num;
extern char tprintf_thread_prefix;
#define LOG_PREFIX { \
extern int next_thread_num;
extern std::map<void *, int> instance_name_map;
extern int next_instance_num;
extern char tprintf_thread_prefix;
#define LOG_PREFIX { \