150 lines
3.5 KiB
C++
150 lines
3.5 KiB
C++
/*
|
|
* Copyright (C) 2008 The Android Open Source Project
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
|
|
/*
|
|
* System clock functions.
|
|
*/
|
|
|
|
#ifdef HAVE_ANDROID_OS
|
|
#include <linux/ioctl.h>
|
|
#include <linux/rtc.h>
|
|
#include <utils/Atomic.h>
|
|
#include <linux/android_alarm.h>
|
|
#endif
|
|
|
|
#include <sys/time.h>
|
|
#include <limits.h>
|
|
#include <fcntl.h>
|
|
#include <errno.h>
|
|
#include <string.h>
|
|
|
|
#include <utils/SystemClock.h>
|
|
#include <utils/Timers.h>
|
|
|
|
#define LOG_TAG "SystemClock"
|
|
#include "utils/Log.h"
|
|
|
|
namespace android {
|
|
|
|
/*
|
|
* Set the current time. This only works when running as root.
|
|
*/
|
|
int setCurrentTimeMillis(int64_t millis)
|
|
{
|
|
#if WIN32
|
|
// not implemented
|
|
return -1;
|
|
#else
|
|
struct timeval tv;
|
|
#ifdef HAVE_ANDROID_OS
|
|
struct timespec ts;
|
|
int fd;
|
|
int res;
|
|
#endif
|
|
int ret = 0;
|
|
|
|
if (millis <= 0 || millis / 1000LL >= INT_MAX) {
|
|
return -1;
|
|
}
|
|
|
|
tv.tv_sec = (time_t) (millis / 1000LL);
|
|
tv.tv_usec = (suseconds_t) ((millis % 1000LL) * 1000LL);
|
|
|
|
ALOGD("Setting time of day to sec=%d\n", (int) tv.tv_sec);
|
|
|
|
#ifdef HAVE_ANDROID_OS
|
|
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) {
|
|
ALOGW("Unable to set rtc to %ld: %s\n", tv.tv_sec, strerror(errno));
|
|
ret = -1;
|
|
}
|
|
close(fd);
|
|
#else
|
|
if (settimeofday(&tv, NULL) != 0) {
|
|
ALOGW("Unable to set clock to %d.%d: %s\n",
|
|
(int) tv.tv_sec, (int) tv.tv_usec, strerror(errno));
|
|
ret = -1;
|
|
}
|
|
#endif
|
|
|
|
return ret;
|
|
#endif // WIN32
|
|
}
|
|
|
|
/*
|
|
* native public static long uptimeMillis();
|
|
*/
|
|
int64_t uptimeMillis()
|
|
{
|
|
int64_t when = systemTime(SYSTEM_TIME_MONOTONIC);
|
|
return (int64_t) nanoseconds_to_milliseconds(when);
|
|
}
|
|
|
|
/*
|
|
* native public static long elapsedRealtime();
|
|
*/
|
|
int64_t elapsedRealtime()
|
|
{
|
|
return nanoseconds_to_milliseconds(elapsedRealtimeNano());
|
|
}
|
|
|
|
/*
|
|
* native public static long elapsedRealtimeNano();
|
|
*/
|
|
int64_t elapsedRealtimeNano()
|
|
{
|
|
#ifdef HAVE_ANDROID_OS
|
|
struct timespec ts;
|
|
int result = clock_gettime(CLOCK_BOOTTIME, &ts);
|
|
if (result == 0) {
|
|
return seconds_to_nanoseconds(ts.tv_sec) + ts.tv_nsec;
|
|
}
|
|
|
|
// CLOCK_BOOTTIME doesn't exist, fallback to /dev/alarm
|
|
static int s_fd = -1;
|
|
|
|
if (s_fd == -1) {
|
|
int fd = open("/dev/alarm", O_RDONLY);
|
|
if (android_atomic_cmpxchg(-1, fd, &s_fd)) {
|
|
close(fd);
|
|
}
|
|
result = ioctl(s_fd,
|
|
ANDROID_ALARM_GET_TIME(ANDROID_ALARM_ELAPSED_REALTIME), &ts);
|
|
}
|
|
|
|
if (result == 0) {
|
|
return seconds_to_nanoseconds(ts.tv_sec) + ts.tv_nsec;
|
|
}
|
|
|
|
// XXX: there was an error, probably because the driver didn't
|
|
// exist ... this should return
|
|
// a real error, like an exception!
|
|
return systemTime(SYSTEM_TIME_MONOTONIC);
|
|
#else
|
|
return systemTime(SYSTEM_TIME_MONOTONIC);
|
|
#endif
|
|
}
|
|
|
|
}; // namespace android
|