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std::timespec_get

科技促进发展：[医]弄到

Defined in header ​​
int timespec_get( std::timespec* ts, int base)​(since C++17)
#define TIME_UTC /* implementation-defined */​(since C++17)

1%29修改std::timespec对象所指向的ts在时间基中保存当前日历时间base...

2%29扩展到适合用作base争论std::timespec_get

其他宏常量以TIME_可以由实现提供以指示额外的时间基础。

如果base是TIME_UTC然后。

  • ts->tv_sec设置为自实现定义的时代以来的秒数，截断为整值。

  • ts->tv_nsec成员设置为纳秒的整数，舍入到系统时钟的分辨率。

参数

ts-pointer to an object of type std::timespec
base-TIME_UTC or another nonzero integer value indicating the time base

返回值

价值base如果成功，否则为零。

注记

POSIX函数钟[医]获取时间%28 CLOCK[医]实时，ts%29也可用于填充std::timespec从那个时代开始。

例

二次

#include <cstdio>
#include <ctime>
 
int main()
{
    std::timespec ts;
    std::timespec_get(&ts, TIME_UTC
    char buff[100];
    std::strftime(buff, sizeof buff, "%D %T", std::gmtime(&ts.tv_sec)
    std::printf("Current time: %s.%09ld UTC\n", buff, ts.tv_nsec
}

二次

可能的产出：

二次

Current time: 06/24/16 20:07:42.949494132 UTC

二次

另见

timespec (since C++17)time in seconds and nanoseconds (struct)
timereturns the current time of the system as time since epoch (function)

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