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Minor changes on sys_time

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A get/set flag determines whether to read or write time.
This commit is contained in:
Bahadir Balban
2008-04-18 01:03:39 +01:00
parent a87914910c
commit 5563cc1c6b
3 changed files with 47 additions and 16 deletions
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41
src/generic/time.c
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@@ -76,28 +76,39 @@ void update_system_time(void)
int sys_time(struct syscall_args *args)
{
struct time_info *ti = (struct time_info *)args->r0;
int set = (int)args->r1;
int retries = 20;
if (check_access((unsigned long)ti, sizeof(*ti), MAP_USR_RW_FLAGS) < 0)
return -EINVAL;
while(retries > 0) {
systime.reader = 1;
memcpy(ti, &systime, sizeof(*ti));
retries--;
/* Get time */
if (!set) {
while(retries > 0) {
systime.reader = 1;
memcpy(ti, &systime, sizeof(*ti));
retries--;
if (systime.reader)
break;
if (systime.reader)
break;
}
/*
* No need to reset reader since it will be reset
* on next timer. If no retries return busy.
*/
if (!retries)
return -EBUSY;
else
return 0;
/* Set */
} else {
/*
* Setting the time not supported yet.
*/
return -ENOSYS;
}
/*
* No need to reset reader since it will be reset
* on next timer. If no retries return busy.
*/
if (!retries)
return -EBUSY;
else
return 0;
}
void update_process_times(void)