time.h ( File view )

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			#ifndef _TIME_H
#define _TIME_H

#ifndef _TIME_T
#define _TIME_T
typedef long time_t;		// 从GMT 1970 年1 月1 日开始的以秒计数的时间(日历时间)。
#endif

#ifndef _SIZE_T
#define _SIZE_T
typedef unsigned int size_t;
#endif

#define CLOCKS_PER_SEC 100	// 系统时钟滴答频率,100HZ。

typedef long clock_t;		// 从进程开始系统经过的时钟滴答数。

struct tm
{

  int tm_sec;			// 秒数 [0,59]。
  int tm_min;			// 分钟数 [ 0,59]。
  int tm_hour;			// 小时数 [0,59]。
  int tm_mday;			// 1 个月的天数 [0,31]。
  int tm_mon;			// 1 年中月份 [0,11]。
  int tm_year;			// 从1900 年开始的年数。
  int tm_wday;			// 1 星期中的某天 [0,6](星期天 =0)。
  int tm_yday;			// 1 年中的某天 [0,365]。
  int tm_isdst;			// 夏令时标志。

};

// 以下是有关时间操作的函数原型。
// 确定处理器使用时间。返回程序所用处理器时间(滴答数)的近似值。
clock_t clock (void);
// 取时间(秒数)。返回从1970.1.1:0:0:0 开始的秒数(称为日历时间)。
time_t time (time_t * tp);
// 计算时间差。返回时间time2 与time1 之间经过的秒数。
double difftime (time_t time2, time_t time1);
// 将tm 结构表示的时间转换成日历时间。
time_t mktime (struct tm *tp);

// 将tm 结构表示的时间转换成一个字符串。返回指向该串的指针。
char *asctime (const struct tm *tp);
// 将日历时间转换成一个字符串形式,如“Wed Jun 30 21:49:08:1993\n”。
char *ctime (const time_t * tp);
// 将日历时间转换成tm 结构表示的UTC 时间(UTC - 世界时间代码Universal Time Code)。
struct tm *gmtime (const time_t * tp);
// 将日历时间转换成tm 结构表示的指定时间区(timezone)的时间。
struct tm *localtime (const time_t * tp);
// 将tm 结构表示的时间利用格式字符串fmt 转换成最大长度为smax 的字符串并将结果存储在s 中。
size_t strftime (char *s, size_t smax, const char *fmt, const struct tm *tp);
// 初始化时间转换信息,使用环境变量TZ,对zname 变量进行初始化。
// 在与时间区相关的时间转换函数中将自动调用该函数。
void tzset (void);

#endif
			
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system.h4.08 kB02-09-04 13:14
const.h589.00 B02-09-04 13:14
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tty.h3.93 kB02-09-04 13:14
signal.h4.01 kB02-09-04 13:14
stdarg.h1.77 kB02-09-04 13:14
stddef.h378.00 B02-09-04 13:14
string.h21.75 kB02-09-04 13:14
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stat.h2.37 kB02-09-04 13:14
times.h377.00 B02-09-04 13:14
types.h1.10 kB02-09-04 13:14
utsname.h423.00 B02-09-04 13:14
wait.h1.48 kB02-09-04 13:14
termios.h13.58 kB02-09-04 13:14
time.h1.81 kB02-09-04 13:14
unistd.h9.21 kB02-09-04 13:14
utime.h392.00 B02-09-04 13:14
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ll_rw_blk.c7.59 kB02-09-04 13:12
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Makefile3.21 kB08-01-04 23:01
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mktime.c2.72 kB02-09-04 13:12
panic.c952.00 B02-09-04 13:12
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sched.c18.57 kB16-07-07 21:23
signal.c5.61 kB02-09-04 13:12
sys.c7.62 kB02-09-04 13:12
system_call.s12.53 kB08-01-04 22:48
traps.c8.29 kB04-10-07 14:57
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<lib>0.00 B04-10-07 15:01
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ctype.c1.72 kB02-09-04 13:12
dup.c401.00 B02-09-04 13:12
errno.c66.00 B02-09-04 13:12
execve.c607.00 B02-09-04 13:12
Makefile4.83 kB08-01-04 22:30
malloc.c13.50 kB02-09-04 13:12
open.c1.22 kB02-09-04 13:12
setsid.c382.00 B02-09-04 13:12
string.c199.00 B02-09-04 13:12
wait.c774.00 B02-09-04 13:12
write.c545.00 B02-09-04 13:12
_exit.c616.00 B02-09-04 13:12
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page.s842.00 B08-01-04 22:34
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