struct timeval { time_t tv_sec; /* seconds */ suseconds_t tv_usec; /* microseconds */ }; millisecond 毫秒 microsecond 微秒
timeval表示一个时间点,比如:
timeval.tv_sec = 1 (s)
timevat.tv_usec = 500 000 (μs)
struct timeval { time_t tv_sec; /* seconds */ suseconds_t tv_usec; /* microseconds */ }; millisecond 毫秒 microsecond 微秒
timeval表示一个时间点,比如:
timeval.tv_sec = 1 (s)
timevat.tv_usec = 500 000 (μs)