[FZH] [D] C库函数timer_create()参数问题

[Guannan Ma]

If u use the CLOCK_MONOTONIC clock, the timer will not be affected by
a system time change.
Google some code ex.


2011/5/11 Caius 'kaio' Chance <kaio at fedoraproject.org>:
> 息怒息怒～
>
> 2011/5/10 microcai <microcai at fedoraproject.org>
>
>> 于 2011年05月10日 18:11, ajax he 写道:
>> > microcai这样说不妥吧，对ACMer有偏见？
>> 不是偏见，他们本质如此。
>>
>>
>> >
>> > 在 2011年5月10日 下午2:14，microcai <microcai at fedoraproject.org>写道：
>> >
>> >> 于 2011年05月08日 23:33, cheng chen 写道:
>> >>> 我在使用c语言库函数timer_create()的时候
>> >>>
>> >>> 第一个参数clockid有这样4个选择，
>> >>>
>> >>>       CLOCK_REALTIME（墙上时间）
>> >>>              A settable system-wide real-time clock.
>> >>>
>> >>>       CLOCK_MONOTONIC
>> >>>              A nonsettable monotonically increasing clock that measures
>> >> time
>> >>> from
>> >>>              some unspecified point in the past that does not change
>> >> after
>> >>> system
>> >>>              startup.
>> >>>
>> >>>       CLOCK_PROCESS_CPUTIME_ID (since Linux 2.6.12)（该进程的CPU时间）
>> >>>              A clock that measures (user and system) CPU time consumed
>> by
>> >>> (all of
>> >>>              the threads in) the calling process.
>> >>>
>> >>>       CLOCK_THREAD_CPUTIME_ID (since Linux 2.6.12)（该线程的CPU时间）
>> >>>              A clock that measures (user and system) CPU time consumed
>> by
>> >>> the
>> >>>              calling thread.
>> >>>
>> >>> manual上说的很短，其他都能理解，唯一不理解第二个时钟的使用。能否请大家帮忙讲解一下，谢谢。
>> >>>
>> >>> --
>> >>> Cheng(誠)
>> >>>
>> >>
>> >> ACM 的人也有不懂的啊？！ 不是很厉害的么？都北大毕业的研究生么？
>> >> 不是号称只要算法厉害，对系统的理解都是浮云么？
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>> >>
>> >>
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>
>
>
> --
> Regards ☺ Caius 'kaio' Chance - Fedora Project Contributor
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