blob: 9c71141f2d5a4d93ce84ab10be6f4e1773fa0921 [file] [log] [blame]
/*
* 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.
*/
#define LOG_TAG "SystemClock"
#include <utils/SystemClock.h>
#include <string.h>
#include <errno.h>
#include <time.h>
#include <cutils/compiler.h>
#include <utils/Timers.h>
#include <utils/Log.h>
namespace android {
/*
* native public static long uptimeMillis();
*/
int64_t uptimeMillis()
{
return nanoseconds_to_milliseconds(uptimeNanos());
}
/*
* public static native long uptimeNanos();
*/
int64_t uptimeNanos()
{
return systemTime(SYSTEM_TIME_MONOTONIC);
}
/*
* native public static long elapsedRealtime();
*/
int64_t elapsedRealtime()
{
return nanoseconds_to_milliseconds(elapsedRealtimeNano());
}
/*
* native public static long elapsedRealtimeNano();
*/
int64_t elapsedRealtimeNano()
{
#if defined(__linux__)
struct timespec ts;
int err = clock_gettime(CLOCK_BOOTTIME, &ts);
if (CC_UNLIKELY(err)) {
// This should never happen, but just in case ...
ALOGE("clock_gettime(CLOCK_BOOTTIME) failed: %s", strerror(errno));
return 0;
}
return seconds_to_nanoseconds(ts.tv_sec) + ts.tv_nsec;
#else
return systemTime(SYSTEM_TIME_MONOTONIC);
#endif
}
}; // namespace android