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fix _gettimeofday_r issue. 

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1325 bbd45198-f89e-11dd-88c7-29a3b14d5316
This commit is contained in:
bernard.xiong 2011-03-10 10:30:51 +00:00
parent 107dc2378a
commit 79696e8649
1 changed files with 88 additions and 0 deletions
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88
components/libc/newlib/syscalls.c
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@ -170,6 +170,70 @@ _write_r(struct _reent *ptr, int fd, const void *buf, size_t nbytes)
return rc;
}
#ifndef RT_USING_PTHREADS
#ifndef MILLISECOND_PER_SECOND
#define MILLISECOND_PER_SECOND 1000UL
#endif
#ifndef MICROSECOND_PER_SECOND
#define MICROSECOND_PER_SECOND 1000000UL
#endif
#ifndef NANOSECOND_PER_SECOND
#define NANOSECOND_PER_SECOND 1000000000UL
#endif
#define MILLISECOND_PER_TICK (MILLISECOND_PER_SECOND / RT_TICK_PER_SECOND)
#define MICROSECOND_PER_TICK (MICROSECOND_PER_SECOND / RT_TICK_PER_SECOND)
#define NANOSECOND_PER_TICK (NANOSECOND_PER_SECOND / RT_TICK_PER_SECOND)
struct timeval _timevalue = {0};
static void libc_system_time_init()
{
time_t time;
rt_tick_t tick;
rt_device_t device;
time = 0;
device = rt_device_find("rtc");
if (device != RT_NULL)
{
/* get realtime seconds */
rt_device_control(device, RT_DEVICE_CTRL_RTC_GET_TIME, &time);
}
/* get tick */
tick = rt_tick_get();
_timevalue.tv_usec = MICROSECOND_PER_SECOND - (tick%RT_TICK_PER_SECOND) * MICROSECOND_PER_TICK;
_timevalue.tv_sec = time - tick/RT_TICK_PER_SECOND - 1;
}
int libc_get_time(struct timespec *time)
{
rt_tick_t tick;
static rt_bool_t inited = 0;
RT_ASSERT(time != RT_NULL);
/* initialize system time */
if (inited == 0)
{
libc_system_time_init();
inited = 1;
}
/* get tick */
tick = rt_tick_get();
time->tv_sec = _timevalue.tv_sec + tick / RT_TICK_PER_SECOND;
time->tv_nsec = (_timevalue.tv_usec + (tick % RT_TICK_PER_SECOND) * NANOSECOND_PER_TICK) * 1000;
return 0;
}
int
_gettimeofday_r(struct _reent *ptr, struct timeval *__tp, void *__tzp)
{
@ -190,6 +254,30 @@ _gettimeofday_r(struct _reent *ptr, struct timeval *__tp, void *__tzp)
ptr->_errno = ENOTSUP;
return -1;
}
#else
/* POSIX thread provides clock_gettime function */
#include <time.h>
int
_gettimeofday_r(struct _reent *ptr, struct timeval *__tp, void *__tzp)
{
struct timespec tp;
if (clock_gettime(CLOCK_REALTIME, &tp) == 0)
{
if (__tp != RT_NULL)
{
__tp->tv_sec = tp.tv_sec;
__tp->tv_usec = tp.tv_nsec * 1000UL;
}
return tp.tv_sec;
}
/* return "not supported" */
ptr->_errno = ENOTSUP;
return -1;
}
#endif
/* Memory routine */
void *