November 2016
Beginner to intermediate
816 pages
19h 58m
Japanese
Content preview from Cクイックリファレンス 第2版
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tmpfile, tmpfile_s
593
#include <time.h>
int timespec_get(struct timespec*
ts
, int
base
);
関数
timespec_get()
は引数
ts
が指す
timespec
オブジェクトを引数
base
で指定した時間
基準に従い現在のカレンダー時刻を反映するよう設定する。
timespec
構造体は秒とナノ秒
を格納するために少なくとも 2つのメンバを持つ。
time_t tv_sec; //
秒数
>= 0
long tv_nsec; // 0 <=
ナノ秒数
<= 999,999,999
メンバの順序は定義されない。正の定数
TIME_UTC
は引数
base
の値として常に使うことが
でき、世界時（グリニッジ標準時）を示す（実装は他の時間基準定数を定義できる）。UTC
では、
timespec_get()
は次のようにカレンダー時刻を格納する。
ts->tv_sec
実装依存の紀元（通常は1970年1月1日00:00:00 UTC）からの秒数。
ts->tv_nsec
秒数の後のナノ秒、システムクロックの分解能を反映して丸められる。
成功すると関数
timespec_get()
は正の値
base
を返す。戻り値0はエラーを示す。
■
例
struct timespec ts = {0};
if (timespec_get(&ts, TIME_UTC) != 0)
{
printf("The exact local time:\n"
"%.24s and %09lu ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.