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[libc] 优化nanosleep函数

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Meco Man 2022-01-06 12:22:11 -05:00 committed by Bernard Xiong
parent 8565fe2448
commit 29c19f7ffd
2 changed files with 15 additions and 29 deletions
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5
components/libc/compilers/common/sys/time.h
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@ -79,6 +79,10 @@ char* ctime(const time_t* tim_p);
time_t time(time_t* t); time_t time(time_t* t);
#endif #endif
#ifdef RT_USING_POSIX_DELAY
int nanosleep(const struct timespec *rqtp, struct timespec *rmtp);
#endif /* RT_USING_POSIX_DELAY */
#ifdef RT_USING_POSIX_CLOCK #ifdef RT_USING_POSIX_CLOCK
/* POSIX clock and timer */ /* POSIX clock and timer */
#define MILLISECOND_PER_SECOND 1000UL #define MILLISECOND_PER_SECOND 1000UL
@ -110,7 +114,6 @@ int clock_getres (clockid_t clockid, struct timespec *res);
int clock_gettime (clockid_t clockid, struct timespec *tp); int clock_gettime (clockid_t clockid, struct timespec *tp);
int clock_settime (clockid_t clockid, const struct timespec *tp); int clock_settime (clockid_t clockid, const struct timespec *tp);
int clock_nanosleep(clockid_t clockid, int flags, const struct timespec *rqtp, struct timespec *rmtp); int clock_nanosleep(clockid_t clockid, int flags, const struct timespec *rqtp, struct timespec *rmtp);
int nanosleep(const struct timespec *rqtp, struct timespec *rmtp);
int rt_timespec_to_tick(const struct timespec *time); int rt_timespec_to_tick(const struct timespec *time);
#endif /* RT_USING_POSIX_CLOCK */ #endif /* RT_USING_POSIX_CLOCK */

39
components/libc/compilers/common/time.c
View File

@ -488,8 +488,18 @@ RTM_EXPORT(settimeofday);
RTM_EXPORT(difftime); RTM_EXPORT(difftime);
RTM_EXPORT(strftime); RTM_EXPORT(strftime);
#ifdef RT_USING_POSIX_CLOCK #ifdef RT_USING_POSIX_DELAY
#include <delay.h> #include <delay.h>
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 #ifdef RT_USING_RTC
static volatile struct timeval _timevalue; static volatile struct timeval _timevalue;
static int _rt_clock_time_system_init() static int _rt_clock_time_system_init()
@ -670,33 +680,6 @@ int clock_settime(clockid_t clockid, const struct timespec *tp)
} }
RTM_EXPORT(clock_settime); RTM_EXPORT(clock_settime);
int nanosleep(const struct timespec *rqtp, struct timespec *rmtp)
{
uint32_t time_ms = rqtp->tv_sec * 1000;
uint32_t time_us = rqtp->tv_nsec / 1000;
time_ms += time_us / 1000 ;
time_us = time_us % 1000;
if (rt_thread_self() != RT_NULL)
{
rt_thread_mdelay(time_ms);
}
else /* scheduler has not run yet */
{
while(time_ms > 0)
{
udelay(1000u);
time_ms -= 1;
}
}
udelay(time_us);
return 0;
}
RTM_EXPORT(nanosleep);
int rt_timespec_to_tick(const struct timespec *time) int rt_timespec_to_tick(const struct timespec *time)
{ {
int tick; int tick;