c_cpp 以C为单位获取当前时间，以微秒为单位。

Posted 2021-05-14

#include <sys/time.h>

/**
 * Returns the current time in microseconds.
 */
long getMicrotime(){
	struct timeval currentTime;
	gettimeofday(&currentTime, NULL);
	return currentTime.tv_sec * (int)1e6 + currentTime.tv_usec;
}