查看“Time ns”的源代码

=== NAME ===

    time_ns() - return the number of nanoseconds since January 1, 1970

=== SYNOPSIS ===

    int time_ns( void );

=== DESCRIPTION ===

    Return the number of nanoseconds since midnight (GMT) January 1, 1970.
 
    注意：这是202年5月30日 3478cc2 分支新增efun。

=== SEE ALSO ===

    [[time]](3), [[ctime]](3), [[localtime]](3), [[time_expression]](3), [[uptime]](3), [[perf_counter_ns]](3)