am 69ad42a3: am 1877f7dc: am 0b64fa7e: am c978799c: Merge "Add /dev/rtc backend to SystemClock"

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;

    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;

}