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Changed time representation to posix style struct timeval/ gettimeofday.

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This commit is contained in:
Bahadir Balban
2008-04-18 13:58:37 +01:00
parent 5563cc1c6b
commit cff7a505e8
5 changed files with 40 additions and 40 deletions
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37
src/generic/time.c
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@@ -29,20 +29,23 @@ static inline void increase_jiffies(void)
}
/* Represents time since epoch */
/* Internal representation of time since epoch */
struct time_info {
int reader;
u32 thz; /* Ticks in this hertz so far */
u32 sec;
u32 min;
u32 hour;
u64 day;
u64 sec; /* Seconds so far */
};
/* Used by posix systems */
struct timeval {
int tv_sec;
int tv_usec;
};
static struct time_info systime = { 0 };
/*
* A terribly basic (probably erroneous)
* A very basic (probably erroneous)
* rule-of-thumb time calculation.
*/
void update_system_time(void)
@@ -54,41 +57,31 @@ void update_system_time(void)
/* Increase just like jiffies, but reset every HZ */
systime.thz++;
/* On every HZ increase seconds */
if (systime.thz == HZ) {
systime.thz = 0;
systime.sec++;
}
if (systime.sec == 60) {
systime.sec = 0;
systime.min++;
}
if (systime.min == 60) {
systime.min = 0;
systime.hour++;
}
if (systime.hour == 24) {
systime.hour = 0;
systime.day++;
}
}
/* Read system time */
int sys_time(struct syscall_args *args)
{
struct time_info *ti = (struct time_info *)args->r0;
struct timeval *tv = (struct timeval *)args->r0;
int set = (int)args->r1;
int retries = 20;
if (check_access((unsigned long)ti, sizeof(*ti), MAP_USR_RW_FLAGS) < 0)
if (check_access((unsigned long)tv, sizeof(*tv), MAP_USR_RW_FLAGS) < 0)
return -EINVAL;
/* Get time */
if (!set) {
while(retries > 0) {
systime.reader = 1;
memcpy(ti, &systime, sizeof(*ti));
retries--;
tv->tv_sec = systime.sec;
tv->tv_usec = 1000000 * systime.thz / HZ;
retries--;
if (systime.reader)
break;
}