移植rt-thread的过程中出现 #20: identifier “time_t“ is undefined...

1万 · 2021-7-1 17:43

移植rt-thread的过程中出现 #20: identifier “time_t“ is undefined或 identifier “clock_t“ is undefined

主要原因是在linux操作系统上这些值时定义的，但是移植到IAR或KEIL中是没有定义的，我查了半天三个值需要定义

typedef long int time_t;
typedef long clock_t;
struct tm
{
      int tm_sec;
      int tm_min;
      int tm_hour;
      int tm_mday;  //一个月中的某天(0 - 31)
      int tm_mon;
      int tm_year;
      int tm_wday;  //星期(0 - 6)
      int tm_yday;  //一年中的某天(1 - 365)
      int tm_isdst; //夏令时(即夏天将时间调快1小时)

};

1万 · 2021-7-1 17:44

修改后的time.c和time.h

/*
* Copyright (c) 2006-2018, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date          Author    Notes
* 2019-08-21    zhangjun    copy from minilibc
*/

#include <time.h>
#include <rtthread.h>

#if !defined (__IAR_SYSTEMS_ICC__)

/* days per month -- nonleap! */
const short __spm[13] =
{
0,
(31),
(31 + 28),
(31 + 28 + 31),
(31 + 28 + 31 + 30),
(31 + 28 + 31 + 30 + 31),
(31 + 28 + 31 + 30 + 31 + 30),
(31 + 28 + 31 + 30 + 31 + 30 + 31),
(31 + 28 + 31 + 30 + 31 + 30 + 31 + 31),
(31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30),
(31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31),
(31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30),
(31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 31),
};
static const char days[] = "Sun Mon Tue Wed Thu Fri Sat ";
static const char months[] = "Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec ";

/* seconds per day */
#define SPD 24*60*60

int __isleap(int year)
{
/* every fourth year is a leap year except for century years that are
   * not divisible by 400. */
/*  return (year % 4 == 0 && (year % 100 != 0 || year % 400 == 0)); */
return (!(year % 4) && ((year % 100) || !(year % 400)));
}

struct tm *gmtime_r(const time_t *timep, struct tm *r)
{
time_t i;
register time_t work = *timep % (SPD);
r->tm_sec = work % 60;
work /= 60;
r->tm_min = work % 60;
r->tm_hour = work / 60;
work = *timep / (SPD);
r->tm_wday = (4 + work) % 7;
for (i = 1970;; ++i)
{
      register time_t k = __isleap(i) ? 366 : 365;
      if (work >= k)
         work -= k;
      else
         break;
}
r->tm_year = i - 1900;
r->tm_yday = work;

r->tm_mday = 1;
if (__isleap(i) && (work > 58))
{
      if (work == 59)
         r->tm_mday = 2; /* 29.2. */
      work -= 1;
}

for (i = 11; i && (__spm > work); --i)
      ;
r->tm_mon = i;
r->tm_mday += work - __spm;
return r;
}

struct tm* gmtime(const time_t* t)
{
static struct tm tmp;
return gmtime_r(t, &tmp);
}

/*TODO timezone is not supprt now */
struct tm* localtime_r(const time_t* t, struct tm* r)
{
return gmtime_r(t, r);
}

struct tm* localtime(const time_t* t)
{
static struct tm tmp;
return localtime_r(t, &tmp);
}

time_t mktime(struct tm * const t)
{
register time_t day;
register time_t i;
register time_t years = t->tm_year - 70;

if (t->tm_sec > 60)
{
      t->tm_min += t->tm_sec / 60;
      t->tm_sec %= 60;
}
if (t->tm_min > 60)
{
      t->tm_hour += t->tm_min / 60;
      t->tm_min %= 60;
}
if (t->tm_hour > 24)
{
      t->tm_mday += t->tm_hour / 24;
      t->tm_hour %= 24;
}
if (t->tm_mon > 12)
{
      t->tm_year += t->tm_mon / 12;
      t->tm_mon %= 12;
}
while (t->tm_mday > __spm[1 + t->tm_mon])
{
      if (t->tm_mon == 1 && __isleap(t->tm_year + 1900))
      {
         --t->tm_mday;
      }
      t->tm_mday -= __spm[t->tm_mon];
      ++t->tm_mon;
      if (t->tm_mon > 11)
      {
         t->tm_mon = 0;
         ++t->tm_year;
      }
}

if (t->tm_year < 70)
      return (time_t) - 1;

/* Days since 1970 is 365 * number of years + number of leap years since 1970 */
day = years * 365 + (years + 1) / 4;

/* After 2100 we have to substract 3 leap years for every 400 years
   This is not intuitive. Most mktime implementations do not support
   dates after 2059, anyway, so we might leave this out for it's
   bloat. */
if (years >= 131)
{
      years -= 131;
      years /= 100;
      day -= (years >> 2) * 3 + 1;
      if ((years &= 3) == 3)
         years--;
      day -= years;
}

day += t->tm_yday = __spm[t->tm_mon] + t->tm_mday - 1 +
                     (__isleap(t->tm_year + 1900) & (t->tm_mon > 1));

/* day is now the number of days since 'Jan 1 1970' */
i = 7;
t->tm_wday = (day + 4) % i; /* Sunday=0, Monday=1, ..., Saturday=6 */

i = 24;
day *= i;
i = 60;
return ((day + t->tm_hour) * i + t->tm_min) * i + t->tm_sec;
}

static void num2str(char *c, int i)
{
c[0] = i / 10 + '0';
c[1] = i % 10 + '0';
}

char* asctime_r(const struct tm *t, char *buf)
{
/* "Wed Jun 30 21:49:08 1993\n" */
*(int*) buf = *(int*) (days + (t->tm_wday << 2));
*(int*) (buf + 4) = *(int*) (months + (t->tm_mon << 2));
num2str(buf + 8, t->tm_mday);
if (buf[8] == '0')
      buf[8] = ' ';
buf[10] = ' ';
num2str(buf + 11, t->tm_hour);
buf[13] = ':';
num2str(buf + 14, t->tm_min);
buf[16] = ':';
num2str(buf + 17, t->tm_sec);
buf[19] = ' ';
num2str(buf + 20, (t->tm_year + 1900) / 100);
num2str(buf + 22, (t->tm_year + 1900) % 100);
buf[24] = '\n';
return buf;
}

char* asctime(const struct tm *timeptr)
{
static char buf[25];
return asctime_r(timeptr, buf);
}

char* ctime(const time_t *timep)
{
return asctime(localtime(timep));
}

#endif /* __IAR_SYSTEMS_ICC__ */

int gettimeofday(struct timeval *tp, void *ignore)
{
time_t time = 0;
#ifdef RT_USING_DEVICE
rt_device_t device;
device = rt_device_find("rtc");
RT_ASSERT(device != RT_NULL);
rt_device_control(device, RT_DEVICE_CTRL_RTC_GET_TIME, &time);
if (tp != RT_NULL)
{
      tp->tv_sec = time;
      tp->tv_usec = 0;
}
#else
tv->tv_sec = 0;
tv->tv_usec = 0;
#endif

return time;
}

/**
* Returns the current time.
*
* @param time_t * t the timestamp pointer, if not used, keep NULL.
*
* @return time_t return timestamp current.
*
*/
/* for IAR 6.2 later Compiler */
#if defined (__IAR_SYSTEMS_ICC__) &&  (__VER__) >= 6020000
#pragma module_name = "?time"
#if _DLIB_TIME_USES_64
time_t __time64(time_t *t)
#else
time_t __time32(time_t *t)
#endif
#else
time_t time(time_t *t)
#endif
{
time_t time_now = 0;

#ifdef RT_USING_RTC
static rt_device_t device = RT_NULL;

/* optimization: find rtc device only first. */
if (device == RT_NULL)
{
      device = rt_device_find("rtc");
}

/* read timestamp from RTC device. */
if (device != RT_NULL)
{
      if (rt_device_open(device, 0) == RT_EOK)
      {
         rt_device_control(device, RT_DEVICE_CTRL_RTC_GET_TIME, &time_now);
         rt_device_close(device);
      }
}
#endif /* RT_USING_RTC */

/* if t is not NULL, write timestamp to *t */
if (t != RT_NULL)
{
      *t = time_now;
}

return time_now;
}

RT_WEAK clock_t clock(void)
{
return rt_tick_get();
}

1万 · 2021-7-1 17:44

/*
* Copyright (c) 2006-2018, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date          Author    Notes
*/
#ifndef _SYS_TIME_H_
#define _SYS_TIME_H_

#include <time.h>

#ifdef __cplusplus
extern "C" {
#endif

typedef long int time_t;
typedef long clock_t;

#ifndef _TIMEVAL_DEFINED
#define _TIMEVAL_DEFINED
/*
* Structure returned by gettimeofday(2) system call,
* and used in other calls.
*/
struct timeval {
long tv_sec;    /* seconds */
long tv_usec; /* and microseconds */
};
#endif /* _TIMEVAL_DEFINED */

/*
* Skip define timespec for IAR version over 8.10.1 where __VER__ is 8010001.
*/
#if defined ( __ICCARM__ ) && (__VER__ >= 8010001)
#define _TIMESPEC_DEFINED
#endif

#ifndef _TIMESPEC_DEFINED
#define _TIMESPEC_DEFINED
/*
* Structure defined by POSIX.1b to be like a timeval.
*/
struct timespec {
time_t  tv_sec;    /* seconds */
long tv_nsec; /* and nanoseconds */
};
#endif /* _TIMESPEC_DEFINED */

struct timezone {
  int tz_minuteswest; /* minutes west of Greenwich */
  int tz_dsttime;    /* type of dst correction */
};
struct tm
{
      int tm_sec;
      int tm_min;
      int tm_hour;
      int tm_mday;  //一个月中的某天(0 - 31)
      int tm_mon;
      int tm_year;
      int tm_wday;  //星期(0 - 6)
      int tm_yday;  //一年中的某天(1 - 365)
      int tm_isdst; //夏令时(即夏天将时间调快1小时)

};
int gettimeofday(struct timeval *tp, void *ignore);
struct tm *gmtime_r(const time_t *timep, struct tm *r);

#ifdef __cplusplus
}
#endif

#endif /* _SYS_TIME_H_ */