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am c978799c: Merge "Add /dev/rtc backend to SystemClock"

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* commit 'c978799c4a7cc8339d560bb47a029861230fa2a6':
  Add /dev/rtc backend to SystemClock
This commit is contained in:
Greg Hackmann
2013-12-17 10:15:37 -08:00
committed by Android Git Automerger
parent 060ae1db7b c978799c4a
commit 0b64fa7e4b
1 changed files with 70 additions and 14 deletions
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84
core/jni/android_os_SystemClock.cpp
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@@ -43,16 +43,77 @@
namespace android {
static int setCurrentTimeMillisAlarmDriver(struct timeval *tv)
{
struct timespec ts;
int fd;
int res;
fd = open("/dev/alarm", O_RDWR);
if(fd < 0) {
ALOGV("Unable to open alarm driver: %s\n", strerror(errno));
return -1;
}
ts.tv_sec = tv->tv_sec;
ts.tv_nsec = tv->tv_usec * 1000;
res = ioctl(fd, ANDROID_ALARM_SET_RTC, &ts);
if (res < 0)
ALOGV("ANDROID_ALARM_SET_RTC ioctl failed: %s\n", strerror(errno));
close(fd);
return res;
}
static int setCurrentTimeMillisRtc(struct timeval *tv)
{
struct rtc_time rtc;
struct tm tm, *gmtime_res;
int fd;
int res;
fd = open("/dev/rtc0", O_RDWR);
if (fd < 0) {
ALOGV("Unable to open RTC driver: %s\n", strerror(errno));
return -1;
}
res = settimeofday(tv, NULL);
if (res < 0) {
ALOGV("settimeofday() failed: %s\n", strerror(errno));
goto done;
}
gmtime_res = gmtime_r(&tv->tv_sec, &tm);
if (!gmtime_res) {
ALOGV("gmtime_r() failed: %s\n", strerror(errno));
res = -1;
goto done;
}
memset(&rtc, 0, sizeof(rtc));
rtc.tm_sec = tm.tm_sec;
rtc.tm_min = tm.tm_min;
rtc.tm_hour = tm.tm_hour;
rtc.tm_mday = tm.tm_mday;
rtc.tm_mon = tm.tm_mon;
rtc.tm_year = tm.tm_year;
rtc.tm_wday = tm.tm_wday;
rtc.tm_yday = tm.tm_yday;
rtc.tm_isdst = tm.tm_isdst;
res = ioctl(fd, RTC_SET_TIME, &rtc);
if (res < 0)
ALOGV("RTC_SET_TIME ioctl failed: %s\n", strerror(errno));
done:
close(fd);
return res;
}
/*
* Set the current time. This only works when running as root.
*/
static int setCurrentTimeMillis(int64_t millis)
{
struct timeval tv;
struct timespec ts;
int fd;
int res;
int ret = 0;
int ret;
if (millis <= 0 || millis / 1000LL >= INT_MAX) {
return -1;
@@ -63,19 +124,14 @@ static int setCurrentTimeMillis(int64_t millis)
ALOGD("Setting time of day to sec=%d\n", (int) tv.tv_sec);
fd = open("/dev/alarm", O_RDWR);
if(fd < 0) {
ALOGW("Unable to open alarm driver: %s\n", strerror(errno));
return -1;
}
ts.tv_sec = tv.tv_sec;
ts.tv_nsec = tv.tv_usec * 1000;
res = ioctl(fd, ANDROID_ALARM_SET_RTC, &ts);
if(res < 0) {
ret = setCurrentTimeMillisAlarmDriver(&tv);
if (ret < 0)
ret = setCurrentTimeMillisRtc(&tv);
if(ret < 0) {
ALOGW("Unable to set rtc to %ld: %s\n", tv.tv_sec, strerror(errno));
ret = -1;
}
close(fd);
return ret;
}