af1cf07134
HAVE_ANDROID_OS was defined as "1" for targets, but never defined as "0" for non-targets. Changing them to #ifdef should be safe and matches all the other uses of HAVE_ANDROID_OS throughout the system. Change-Id: I82257325a8ae5e4e4371ddfc4dbf51cea8ea0abb
140 lines
3.3 KiB
C++
140 lines
3.3 KiB
C++
/*
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* Copyright (C) 2008 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*
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* System clock functions.
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*/
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#ifdef HAVE_ANDROID_OS
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#include <linux/ioctl.h>
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#include <linux/rtc.h>
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#include <utils/Atomic.h>
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#include <linux/android_alarm.h>
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#endif
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#include <sys/time.h>
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#include <limits.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <string.h>
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#include <utils/SystemClock.h>
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#include <utils/Timers.h>
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#define LOG_TAG "SystemClock"
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#include "utils/Log.h"
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namespace android {
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/*
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* Set the current time. This only works when running as root.
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*/
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int setCurrentTimeMillis(int64_t millis)
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{
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#if WIN32
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// not implemented
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return -1;
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#else
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struct timeval tv;
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#ifdef HAVE_ANDROID_OS
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struct timespec ts;
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int fd;
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int res;
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#endif
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int ret = 0;
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if (millis <= 0 || millis / 1000LL >= INT_MAX) {
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return -1;
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}
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tv.tv_sec = (time_t) (millis / 1000LL);
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tv.tv_usec = (suseconds_t) ((millis % 1000LL) * 1000LL);
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LOGD("Setting time of day to sec=%d\n", (int) tv.tv_sec);
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#ifdef HAVE_ANDROID_OS
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fd = open("/dev/alarm", O_RDWR);
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if(fd < 0) {
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LOGW("Unable to open alarm driver: %s\n", strerror(errno));
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return -1;
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}
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ts.tv_sec = tv.tv_sec;
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ts.tv_nsec = tv.tv_usec * 1000;
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res = ioctl(fd, ANDROID_ALARM_SET_RTC, &ts);
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if(res < 0) {
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LOGW("Unable to set rtc to %ld: %s\n", tv.tv_sec, strerror(errno));
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ret = -1;
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}
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close(fd);
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#else
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if (settimeofday(&tv, NULL) != 0) {
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LOGW("Unable to set clock to %d.%d: %s\n",
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(int) tv.tv_sec, (int) tv.tv_usec, strerror(errno));
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ret = -1;
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}
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#endif
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return ret;
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#endif // WIN32
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}
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/*
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* native public static long uptimeMillis();
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*/
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int64_t uptimeMillis()
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{
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int64_t when = systemTime(SYSTEM_TIME_MONOTONIC);
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return (int64_t) nanoseconds_to_milliseconds(when);
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}
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/*
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* native public static long elapsedRealtime();
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*/
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int64_t elapsedRealtime()
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{
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#ifdef HAVE_ANDROID_OS
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static int s_fd = -1;
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if (s_fd == -1) {
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int fd = open("/dev/alarm", O_RDONLY);
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if (android_atomic_cmpxchg(-1, fd, &s_fd)) {
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close(fd);
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}
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}
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struct timespec ts;
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int result = ioctl(s_fd,
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ANDROID_ALARM_GET_TIME(ANDROID_ALARM_ELAPSED_REALTIME), &ts);
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if (result == 0) {
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int64_t when = seconds_to_nanoseconds(ts.tv_sec) + ts.tv_nsec;
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return (int64_t) nanoseconds_to_milliseconds(when);
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} else {
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// XXX: there was an error, probably because the driver didn't
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// exist ... this should return
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// a real error, like an exception!
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int64_t when = systemTime(SYSTEM_TIME_MONOTONIC);
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return (int64_t) nanoseconds_to_milliseconds(when);
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}
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#else
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int64_t when = systemTime(SYSTEM_TIME_MONOTONIC);
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return (int64_t) nanoseconds_to_milliseconds(when);
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#endif
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}
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}; // namespace android
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