[libc] implement extension standard C functions (#6044)

* implement extension standard C functions

1 files changed, 0 insertions, 1007 deletions

diff --git a/components/libc/compilers/common/time.c b/components/libc/compilers/common/time.c
deleted file mode 100644
index 96591113b8..0000000000
--- a/components/libc/compilers/common/time.c
+++ /dev/null
@@ -1,1007 +0,0 @@
-/*
- * Copyright (c) 2006-2022, RT-Thread Development Team
- *
- * SPDX-License-Identifier: Apache-2.0
- *
- * Change Logs:
- * Date           Author       Notes
- * 2019-08-21     zhangjun     copy from minilibc
- * 2020-09-07     Meco Man     combine gcc armcc iccarm
- * 2021-02-05     Meco Man     add timegm()
- * 2021-02-07     Meco Man     fixed gettimeofday()
- * 2021-02-08     Meco Man     add settimeofday() stime()
- * 2021-02-10     Meco Man     add ctime_r() and re-implement ctime()
- * 2021-02-11     Meco Man     fix bug #3183 - align days[] and months[] to 4 bytes
- * 2021-02-12     Meco Man     add errno
- * 2012-12-08     Bernard      <clock_time.c> fix the issue of _timevalue.tv_usec initialization,
- *                             which found by Rob <[email protected]>
- * 2021-02-12     Meco Man     move all of the functions located in <clock_time.c> to this file
- * 2021-03-15     Meco Man     fixed a bug of leaking memory in asctime()
- * 2021-05-01     Meco Man     support fixed timezone
- * 2021-07-21     Meco Man     implement that change/set timezone APIs
- */
-
-#include "sys/time.h"
-#include <sys/errno.h>
-#include <rtthread.h>
-#include <rthw.h>
-#include <unistd.h>
-#ifdef RT_USING_POSIX_DELAY
-#include <delay.h>
-#endif
-#ifdef RT_USING_RTC
-#include <rtdevice.h>
-#endif
-
-#define DBG_TAG    "time"
-#define DBG_LVL    DBG_INFO
-#include <rtdbg.h>
-
-#define _WARNING_NO_RTC "Cannot find a RTC device!"
-
-/* seconds per day */
-#define SPD 24*60*60
-
-/* days per month -- nonleap! */
-static 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),
-};
-
-ALIGN(4) static const char *days = "Sun Mon Tue Wed Thu Fri Sat ";
-ALIGN(4) static const char *months = "Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec ";
-
-static 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)));
-}
-
-static void num2str(char *c, int i)
-{
-    c[0] = i / 10 + '0';
-    c[1] = i % 10 + '0';
-}
-
-/**
- * Get time from RTC device (without timezone, UTC+0)
- * @param tv: struct timeval
- * @return the operation status, RT_EOK on successful
- */
-static rt_err_t get_timeval(struct timeval *tv)
-{
-#ifdef RT_USING_RTC
-    static rt_device_t device = RT_NULL;
-    rt_err_t rst = -RT_ERROR;
-
-    if (tv == RT_NULL)
-        return -RT_EINVAL;
-
-    /* default is 0 */
-    tv->tv_sec = 0;
-    tv->tv_usec = 0;
-
-    /* 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)
-        {
-            rst = rt_device_control(device, RT_DEVICE_CTRL_RTC_GET_TIME, &tv->tv_sec);
-            rt_device_control(device, RT_DEVICE_CTRL_RTC_GET_TIMEVAL, tv);
-            rt_device_close(device);
-        }
-    }
-    else
-    {
-        LOG_W(_WARNING_NO_RTC);
-        return -RT_ENOSYS;
-    }
-
-    return rst;
-
-#else
-    LOG_W(_WARNING_NO_RTC);
-    return -RT_ENOSYS;
-#endif /* RT_USING_RTC */
-}
-
-/**
- * Set time to RTC device (without timezone)
- * @param tv: struct timeval
- * @return the operation status, RT_EOK on successful
- */
-static int set_timeval(struct timeval *tv)
-{
-#ifdef RT_USING_RTC
-    static rt_device_t device = RT_NULL;
-    rt_err_t rst = -RT_ERROR;
-
-    if (tv == RT_NULL)
-        return -RT_EINVAL;
-
-    /* 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)
-        {
-            rst = rt_device_control(device, RT_DEVICE_CTRL_RTC_SET_TIME, &tv->tv_sec);
-            rt_device_control(device, RT_DEVICE_CTRL_RTC_SET_TIMEVAL, tv);
-            rt_device_close(device);
-        }
-    }
-    else
-    {
-        LOG_W(_WARNING_NO_RTC);
-        return -RT_ENOSYS;
-    }
-
-    return rst;
-
-#else
-    LOG_W(_WARNING_NO_RTC);
-    return -RT_ENOSYS;
-#endif /* RT_USING_RTC */
-}
-
-struct tm *gmtime_r(const time_t *timep, struct tm *r)
-{
-    time_t i;
-    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)
-    {
-        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[i] > work); --i)
-        ;
-    r->tm_mon = i;
-    r->tm_mday += work - __spm[i];
-
-    r->tm_isdst = tz_is_dst();
-    return r;
-}
-RTM_EXPORT(gmtime_r);
-
-struct tm* gmtime(const time_t* t)
-{
-    static struct tm tmp;
-    return gmtime_r(t, &tmp);
-}
-RTM_EXPORT(gmtime);
-
-struct tm* localtime_r(const time_t* t, struct tm* r)
-{
-    time_t local_tz;
-
-    local_tz = *t + (time_t)tz_get() * 3600;
-    return gmtime_r(&local_tz, r);
-}
-RTM_EXPORT(localtime_r);
-
-struct tm* localtime(const time_t* t)
-{
-    static struct tm tmp;
-    return localtime_r(t, &tmp);
-}
-RTM_EXPORT(localtime);
-
-time_t mktime(struct tm * const t)
-{
-    time_t timestamp;
-
-    timestamp = timegm(t);
-    timestamp = timestamp - 3600 * (time_t)tz_get();
-    return timestamp;
-}
-RTM_EXPORT(mktime);
-
-char* asctime_r(const struct tm *t, char *buf)
-{
-    /* Checking input validity */
-    if ((int)rt_strlen(days) <= (t->tm_wday << 2) || (int)rt_strlen(months) <= (t->tm_mon << 2))
-    {
-        LOG_W("asctime_r: the input parameters exceeded the limit, please check it.");
-        *(int*) buf = *(int*) days;
-        *(int*) (buf + 4) = *(int*) months;
-        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, 2000 / 100);
-        num2str(buf + 22, 2000 % 100);
-        buf[24] = '\n';
-        buf[25] = '\0';
-        return 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';
-    buf[25] = '\0';
-    return buf;
-}
-RTM_EXPORT(asctime_r);
-
-char* asctime(const struct tm *timeptr)
-{
-    static char buf[26];
-    return asctime_r(timeptr, buf);
-}
-RTM_EXPORT(asctime);
-
-char *ctime_r(const time_t * tim_p, char * result)
-{
-    struct tm tm;
-    return asctime_r(localtime_r(tim_p, &tm), result);
-}
-RTM_EXPORT(ctime_r);
-
-char* ctime(const time_t *tim_p)
-{
-    return asctime(localtime(tim_p));
-}
-RTM_EXPORT(ctime);
-
-double difftime(time_t time1, time_t time2)
-{
-    return (double)(time1 - time2);
-}
-RTM_EXPORT(difftime);
-
-RTM_EXPORT(strftime); /* inherent in the toolchain */
-
-/**
- * Returns the current time.
- *
- * @param time_t * t the timestamp pointer, if not used, keep NULL.
- *
- * @return The value ((time_t)-1) is returned if the calendar time is not available.
- *         If timer is not a NULL pointer, the return value is also stored in timer.
- *
- */
-RT_WEAK time_t time(time_t *t)
-{
-    struct timeval now;
-
-    if(get_timeval(&now) == RT_EOK)
-    {
-        if (t)
-        {
-            *t = now.tv_sec;
-        }
-        return now.tv_sec;
-    }
-    else
-    {
-        rt_set_errno(EFAULT);
-        return ((time_t)-1);
-    }
-}
-RTM_EXPORT(time);
-
-RT_WEAK clock_t clock(void)
-{
-    return rt_tick_get();
-}
-RTM_EXPORT(clock);
-
-int stime(const time_t *t)
-{
-    struct timeval tv;
-
-    if (!t)
-    {
-        rt_set_errno(EFAULT);
-        return -1;
-    }
-
-    tv.tv_sec = *t;
-    if (set_timeval(&tv) == RT_EOK)
-    {
-        return 0;
-    }
-    else
-    {
-        rt_set_errno(EFAULT);
-        return -1;
-    }
-}
-RTM_EXPORT(stime);
-
-time_t timegm(struct tm * const t)
-{
-    time_t day;
-    time_t i;
-    time_t years = (time_t)t->tm_year - 70;
-
-    if (t->tm_sec > 60)         /* seconds after the minute - [0, 60] including leap second */
-    {
-        t->tm_min += t->tm_sec / 60;
-        t->tm_sec %= 60;
-    }
-    if (t->tm_min >= 60)        /* minutes after the hour - [0, 59] */
-    {
-        t->tm_hour += t->tm_min / 60;
-        t->tm_min %= 60;
-    }
-    if (t->tm_hour >= 24)       /* hours since midnight - [0, 23] */
-    {
-        t->tm_mday += t->tm_hour / 24;
-        t->tm_hour %= 24;
-    }
-    if (t->tm_mon >= 12)        /* months since January - [0, 11] */
-    {
-        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;
-}
-RTM_EXPORT(timegm);
-
-int gettimeofday(struct timeval *tv, struct timezone *tz)
-{
-    /* The use of the timezone structure is obsolete;
-     * the tz argument should normally be specified as NULL.
-     * The tz_dsttime field has never been used under Linux.
-     * Thus, the following is purely of historic interest.
-     */
-    if(tz != RT_NULL)
-    {
-        tz->tz_dsttime = DST_NONE;
-        tz->tz_minuteswest = -(tz_get() * 60);
-    }
-
-    if (tv != RT_NULL && get_timeval(tv) == RT_EOK)
-    {
-        return 0;
-    }
-    else
-    {
-        rt_set_errno(EFAULT);
-        return -1;
-    }
-}
-RTM_EXPORT(gettimeofday);
-
-int settimeofday(const struct timeval *tv, const struct timezone *tz)
-{
-    /* The use of the timezone structure is obsolete;
-     * the tz argument should normally be specified as NULL.
-     * The tz_dsttime field has never been used under Linux.
-     * Thus, the following is purely of historic interest.
-     */
-    if (tv != RT_NULL
-        && tv->tv_usec >= 0
-        && set_timeval((struct timeval *)tv) == RT_EOK)
-    {
-        return 0;
-    }
-    else
-    {
-        rt_set_errno(EINVAL);
-        return -1;
-    }
-}
-RTM_EXPORT(settimeofday);
-
-#ifdef RT_USING_POSIX_DELAY
-int nanosleep(const struct timespec *rqtp, struct timespec *rmtp)
-{
-    sleep(rqtp->tv_sec);
-    ndelay(rqtp->tv_nsec);
-    return 0;
-}
-RTM_EXPORT(nanosleep);
-#endif /* RT_USING_POSIX_DELAY */
-
-#ifdef RT_USING_POSIX_CLOCK
-#ifdef RT_USING_RTC
-static volatile struct timeval _timevalue;
-static int _rt_clock_time_system_init(void)
-{
-    rt_base_t level;
-    time_t time = 0;
-    rt_tick_t tick;
-    rt_device_t device;
-
-    device = rt_device_find("rtc");
-    if (device != RT_NULL)
-    {
-        /* get realtime seconds */
-        if(rt_device_control(device, RT_DEVICE_CTRL_RTC_GET_TIME, &time) == RT_EOK)
-        {
-            level = rt_hw_interrupt_disable();
-            tick = rt_tick_get(); /* get tick */
-            _timevalue.tv_usec = (tick%RT_TICK_PER_SECOND) * MICROSECOND_PER_TICK;
-            _timevalue.tv_sec = time - tick/RT_TICK_PER_SECOND - 1;
-            rt_hw_interrupt_enable(level);
-            return 0;
-        }
-    }
-
-    level = rt_hw_interrupt_disable();
-    _timevalue.tv_usec = 0;
-    _timevalue.tv_sec = 0;
-    rt_hw_interrupt_enable(level);
-
-    return -1;
-}
-INIT_COMPONENT_EXPORT(_rt_clock_time_system_init);
-#endif /* RT_USING_RTC */
-
-int clock_getres(clockid_t clockid, struct timespec *res)
-{
-#ifndef RT_USING_RTC
-    LOG_W(_WARNING_NO_RTC);
-    return -1;
-#else
-    int ret = 0;
-
-    if (res == RT_NULL)
-    {
-        rt_set_errno(EINVAL);
-        return -1;
-    }
-
-    switch (clockid)
-    {
-    case CLOCK_REALTIME:
-        res->tv_sec = 0;
-        res->tv_nsec = NANOSECOND_PER_SECOND/RT_TICK_PER_SECOND;
-        break;
-
-#ifdef RT_USING_CPUTIME
-    case CLOCK_CPUTIME_ID:
-        res->tv_sec  = 0;
-        res->tv_nsec = clock_cpu_getres();
-        break;
-#endif
-
-    default:
-        ret = -1;
-        rt_set_errno(EINVAL);
-        break;
-    }
-
-    return ret;
-#endif /* RT_USING_RTC */
-}
-RTM_EXPORT(clock_getres);
-
-int clock_gettime(clockid_t clockid, struct timespec *tp)
-{
-#ifndef RT_USING_RTC
-    LOG_W(_WARNING_NO_RTC);
-    return -1;
-#else
-    int ret = 0;
-
-    if (tp == RT_NULL)
-    {
-        rt_set_errno(EINVAL);
-        return -1;
-    }
-
-    switch (clockid)
-    {
-    case CLOCK_REALTIME:
-        {
-            int tick;
-            rt_base_t level;
-
-            level = rt_hw_interrupt_disable();
-            tick = rt_tick_get(); /* get tick */
-            tp->tv_sec  = _timevalue.tv_sec + tick / RT_TICK_PER_SECOND;
-            tp->tv_nsec = (_timevalue.tv_usec + (tick % RT_TICK_PER_SECOND) * MICROSECOND_PER_TICK) * 1000;
-            rt_hw_interrupt_enable(level);
-        }
-        break;
-
-#ifdef RT_USING_CPUTIME
-    case CLOCK_CPUTIME_ID:
-        {
-            float unit = 0;
-            long long cpu_tick;
-
-            unit = clock_cpu_getres();
-            cpu_tick = clock_cpu_gettime();
-
-            tp->tv_sec  = ((long long)(cpu_tick * unit)) / NANOSECOND_PER_SECOND;
-            tp->tv_nsec = ((long long)(cpu_tick * unit)) % NANOSECOND_PER_SECOND;
-        }
-        break;
-#endif
-    default:
-        rt_set_errno(EINVAL);
-        ret = -1;
-    }
-
-    return ret;
-#endif /* RT_USING_RTC */
-}
-RTM_EXPORT(clock_gettime);
-
-int clock_nanosleep(clockid_t clockid, int flags, const struct timespec *rqtp, struct timespec *rmtp)
-{
-    if ((clockid != CLOCK_REALTIME) || (rqtp == RT_NULL))
-    {
-        rt_set_errno(EINVAL);
-        return -1;
-    }
-
-    return nanosleep(rqtp, rmtp);
-}
-
-int clock_settime(clockid_t clockid, const struct timespec *tp)
-{
-#ifndef RT_USING_RTC
-    LOG_W(_WARNING_NO_RTC);
-    return -1;
-#else
-    rt_base_t level;
-    int second;
-    rt_tick_t tick;
-    rt_device_t device;
-
-    if ((clockid != CLOCK_REALTIME) || (tp == RT_NULL))
-    {
-        rt_set_errno(EINVAL);
-        return -1;
-    }
-
-    /* get second */
-    second = tp->tv_sec;
-
-    level = rt_hw_interrupt_disable();
-    tick = rt_tick_get(); /* get tick */
-    /* update timevalue */
-    _timevalue.tv_usec = MICROSECOND_PER_SECOND - (tick % RT_TICK_PER_SECOND) * MICROSECOND_PER_TICK;
-    _timevalue.tv_sec = second - tick/RT_TICK_PER_SECOND - 1;
-    rt_hw_interrupt_enable(level);
-
-    /* update for RTC device */
-    device = rt_device_find("rtc");
-    if (device != RT_NULL)
-    {
-        /* set realtime seconds */
-        if(rt_device_control(device, RT_DEVICE_CTRL_RTC_SET_TIME, &second) == RT_EOK)
-        {
-            return 0;
-        }
-    }
-
-    return -1;
-#endif /* RT_USING_RTC */
-}
-RTM_EXPORT(clock_settime);
-
-int rt_timespec_to_tick(const struct timespec *time)
-{
-    int tick;
-    int nsecond, second;
-    struct timespec tp = {0};
-
-    RT_ASSERT(time != RT_NULL);
-
-    tick = RT_WAITING_FOREVER;
-    if (time != NULL)
-    {
-        /* get current tp */
-        clock_gettime(CLOCK_REALTIME, &tp);
-
-        if ((time->tv_nsec - tp.tv_nsec) < 0)
-        {
-            nsecond = NANOSECOND_PER_SECOND - (tp.tv_nsec - time->tv_nsec);
-            second  = time->tv_sec - tp.tv_sec - 1;
-        }
-        else
-        {
-            nsecond = time->tv_nsec - tp.tv_nsec;
-            second  = time->tv_sec - tp.tv_sec;
-        }
-
-        tick = second * RT_TICK_PER_SECOND + nsecond * RT_TICK_PER_SECOND / NANOSECOND_PER_SECOND;
-        if (tick < 0) tick = 0;
-    }
-
-    return tick;
-}
-RTM_EXPORT(rt_timespec_to_tick);
-
-#endif /* RT_USING_POSIX_CLOCK */
-
-#ifdef RT_USING_POSIX_TIMER
-
-#define ACTIVE 1
-#define NOT_ACTIVE 0
-
-struct timer_obj
-{
-    struct rt_timer timer;
-    void (*sigev_notify_function)(union sigval val);
-    union sigval val;
-    struct timespec interval;              /* Reload value */
-    rt_uint32_t reload;                    /* Reload value in ms */
-    rt_uint32_t status;
-};
-
-static void rtthread_timer_wrapper(void *timerobj)
-{
-    struct timer_obj *timer;
-
-    timer = (struct timer_obj *)timerobj;
-
-    if (timer->reload == 0U)
-    {
-        timer->status = NOT_ACTIVE;
-    }
-
-    if(timer->sigev_notify_function != RT_NULL)
-    {
-        (timer->sigev_notify_function)(timer->val);
-    }
-}
-
-/**
- * @brief Create a per-process timer.
- *
- * This API does not accept SIGEV_THREAD as valid signal event notification
- * type.
- *
- * See IEEE 1003.1
- */
-int timer_create(clockid_t clockid, struct sigevent *evp, timer_t *timerid)
-{
-    static int num = 0;
-    struct timer_obj *timer;
-    char timername[RT_NAME_MAX] = {0};
-
-    if (clockid != CLOCK_MONOTONIC || evp == NULL ||
-        (evp->sigev_notify != SIGEV_NONE &&
-         evp->sigev_notify != SIGEV_SIGNAL))
-    {
-        rt_set_errno(EINVAL);
-        return -RT_ERROR;
-    }
-
-    timer = rt_malloc(sizeof(struct timer_obj));
-    if(timer == RT_NULL)
-    {
-        rt_set_errno(ENOMEM);
-        return -RT_ENOMEM;
-    }
-
-    RT_ASSERT(evp->sigev_notify_function != RT_NULL);
-    rt_snprintf(timername, RT_NAME_MAX, "psx_tm%02d", num++);
-    num %= 100;
-    timer->sigev_notify_function = evp->sigev_notify_function;
-    timer->val = evp->sigev_value;
-    timer->interval.tv_sec = 0;
-    timer->interval.tv_nsec = 0;
-    timer->reload = 0U;
-    timer->status = NOT_ACTIVE;
-
-    if (evp->sigev_notify == SIGEV_NONE)
-    {
-        rt_timer_init(&timer->timer, timername, RT_NULL, RT_NULL, 0, RT_TIMER_FLAG_ONE_SHOT | RT_TIMER_FLAG_SOFT_TIMER);
-    }
-    else
-    {
-        rt_timer_init(&timer->timer, timername, rtthread_timer_wrapper, timer, 0, RT_TIMER_FLAG_ONE_SHOT | RT_TIMER_FLAG_SOFT_TIMER);
-    }
-
-    *timerid = (timer_t)timer;
-
-    return RT_EOK;
-}
-RTM_EXPORT(timer_create);
-
-/**
- * @brief Delete a per-process timer.
- *
- * See IEEE 1003.1
- */
-int timer_delete(timer_t timerid)
-{
-    struct timer_obj *timer = (struct timer_obj *)timerid;
-
-    if (timer == RT_NULL)
-    {
-        rt_set_errno(EINVAL);
-        return -RT_ERROR;
-    }
-
-    if (timer->status == ACTIVE)
-    {
-        timer->status = NOT_ACTIVE;
-        rt_timer_stop(&timer->timer);
-    }
-
-    rt_free(timer);
-
-    return RT_EOK;
-}
-RTM_EXPORT(timer_delete);
-
-/**
- *
- *  Return the overrun count for the last timer expiration.
- *  It is subefficient to create a new structure to get overrun count.
- **/
-int timer_getoverrun(timer_t timerid)
-{
-    rt_set_errno(ENOSYS);
-    return -RT_ERROR;
-}
-
-/**
- * @brief Get amount of time left for expiration on a per-process timer.
- *
- * See IEEE 1003.1
- */
-int timer_gettime(timer_t timerid, struct itimerspec *its)
-{
-    struct timer_obj *timer = (struct timer_obj *)timerid;
-    rt_tick_t remaining;
-    rt_uint32_t seconds, nanoseconds;
-
-    if (timer == NULL)
-    {
-        rt_set_errno(EINVAL);
-        return -RT_ERROR;
-    }
-
-    if (its == NULL)
-    {
-        rt_set_errno(EFAULT);
-        return -RT_ERROR;
-    }
-
-    if (timer->status == ACTIVE)
-    {
-        rt_tick_t remain_tick;
-
-        rt_timer_control(&timer->timer, RT_TIMER_CTRL_GET_REMAIN_TIME, &remain_tick);
-
-        /* 'remain_tick' is minimum-unit in the RT-Thread' timer,
-         * so the seconds, nanoseconds will be calculated by 'remain_tick'.
-         */
-        remaining = remain_tick - rt_tick_get();
-
-        /* calculate 'second' */
-        seconds = remaining / RT_TICK_PER_SECOND;
-
-        /* calculate 'nanosecond';  To avoid lost of accuracy, because "RT_TICK_PER_SECOND" maybe 100, 1000, 1024 and so on.
-         *
-         *        remain_tick                  millisecond                                 remain_tick * MILLISECOND_PER_SECOND
-         *  ------------------------- = --------------------------  --->  millisecond = -------------------------------------------
-         *    RT_TICK_PER_SECOND          MILLISECOND_PER_SECOND                                RT_TICK_PER_SECOND
-         *
-         *                    remain_tick * MILLISECOND_PER_SECOND                          remain_tick * MILLISECOND_PER_SECOND * MICROSECOND_PER_SECOND
-         *   millisecond = ----------------------------------------  ---> nanosecond = -------------------------------------------------------------------
-         *                         RT_TICK_PER_SECOND                                                           RT_TICK_PER_SECOND
-         *
-         */
-        nanoseconds = (((remaining % RT_TICK_PER_SECOND) * MILLISECOND_PER_SECOND) * MICROSECOND_PER_SECOND) / RT_TICK_PER_SECOND ;
-
-        its->it_value.tv_sec = (rt_int32_t)seconds;
-        its->it_value.tv_nsec = (rt_int32_t)nanoseconds;
-    }
-    else
-    {
-        /* Timer is disarmed */
-        its->it_value.tv_sec = 0;
-        its->it_value.tv_nsec = 0;
-    }
-
-    /* The interval last set by timer_settime() */
-    its->it_interval = timer->interval;
-    return RT_EOK;
-}
-RTM_EXPORT(timer_gettime);
-
-/**
- * @brief Sets expiration time of per-process timer.
- *
- * See IEEE 1003.1
- */
-int timer_settime(timer_t timerid, int flags, const struct itimerspec *value,
-                  struct itimerspec *ovalue)
-{
-    struct timer_obj *timer = (struct timer_obj *)timerid;
-
-    if (timer == NULL ||
-        value->it_interval.tv_nsec < 0 ||
-        value->it_interval.tv_nsec >= NANOSECOND_PER_SECOND ||
-        value->it_value.tv_nsec < 0 ||
-        value->it_value.tv_nsec >= NANOSECOND_PER_SECOND)
-    {
-        rt_set_errno(EINVAL);
-        return -RT_ERROR;
-    }
-
-    if (value == NULL || ovalue == NULL)
-    {
-        rt_set_errno(EFAULT);
-        return -RT_ERROR;
-    }
-
-    /*  Save time to expire and old reload value. */
-    if (ovalue != NULL)
-    {
-        timer_gettime(timerid, ovalue);
-    }
-
-    /* Stop the timer if the value is 0 */
-    if ((value->it_value.tv_sec == 0) && (value->it_value.tv_nsec == 0))
-    {
-        if (timer->status == ACTIVE)
-        {
-            rt_timer_stop(&timer->timer);
-        }
-
-        timer->status = NOT_ACTIVE;
-        return RT_EOK;
-    }
-
-    /* calculate timer period(tick);  To avoid lost of accuracy, because "RT_TICK_PER_SECOND" maybe 100, 1000, 1024 and so on.
-        *
-        *          tick                        nanosecond                          nanosecond * RT_TICK_PER_SECOND
-        *  ------------------------- = --------------------------  --->  tick = -------------------------------------
-        *    RT_TICK_PER_SECOND           NANOSECOND_PER_SECOND                         NANOSECOND_PER_SECOND
-        *
-        */
-    timer->reload = (value->it_interval.tv_sec * RT_TICK_PER_SECOND) + (value->it_interval.tv_nsec * RT_TICK_PER_SECOND) / NANOSECOND_PER_SECOND;
-    timer->interval.tv_sec = value->it_interval.tv_sec;
-    timer->interval.tv_nsec = value->it_interval.tv_nsec;
-
-    if (timer->status == ACTIVE)
-    {
-        rt_timer_stop(&timer->timer);
-    }
-
-    timer->status = ACTIVE;
-    rt_timer_control(&timer->timer, RT_TIMER_CTRL_SET_TIME, (void *)timer->reload);
-    rt_timer_control(&timer->timer, RT_TIMER_CTRL_SET_PERIODIC, RT_NULL);
-    rt_timer_start(&timer->timer);
-
-    return RT_EOK;
-}
-RTM_EXPORT(timer_settime);
-#endif /* RT_USING_POSIX_TIMER */
-
-
-/* timezone */
-#ifndef RT_LIBC_DEFAULT_TIMEZONE
-#define RT_LIBC_DEFAULT_TIMEZONE    8
-#endif
-
-static volatile int8_t _current_timezone = RT_LIBC_DEFAULT_TIMEZONE;
-
-void tz_set(int8_t tz)
-{
-    rt_base_t level;
-    level = rt_hw_interrupt_disable();
-    _current_timezone = tz;
-    rt_hw_interrupt_enable(level);
-}
-
-int8_t tz_get(void)
-{
-    return _current_timezone;
-}
-
-int8_t tz_is_dst(void)
-{
-    return 0;
-}