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/*
* 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.
*/
#include "JNIHelp.h"
#include "jni.h"
#include "android_runtime/AndroidRuntime.h"
#include "utils/SystemClock.h"
#include <sys/time.h>
#include <time.h>
namespace android {
/*
* native public static void setCurrentTimeMillis(long millis)
*
* Set the current time. This only works when running as root.
*/
static jboolean android_os_SystemClock_setCurrentTimeMillis(JNIEnv* env,
jobject clazz, jlong millis)
{
return (setCurrentTimeMillis(millis) == 0);
}
/*
* native public static long uptimeMillis();
*/
static jlong android_os_SystemClock_uptimeMillis(JNIEnv* env,
jobject clazz)
{
return (jlong)uptimeMillis();
}
/*
* native public static long elapsedRealtime();
*/
static jlong android_os_SystemClock_elapsedRealtime(JNIEnv* env,
jobject clazz)
{
return (jlong)elapsedRealtime();
}
/*
* native public static long currentThreadTimeMillis();
*/
static jlong android_os_SystemClock_currentThreadTimeMillis(JNIEnv* env,
jobject clazz)
{
#if defined(HAVE_POSIX_CLOCKS)
struct timespec tm;
clock_gettime(CLOCK_THREAD_CPUTIME_ID, &tm);
return tm.tv_sec * 1000LL + tm.tv_nsec / 1000000;
#else
struct timeval tv;
gettimeofday(&tv, NULL);
return tv.tv_sec * 1000LL + tv.tv_usec / 1000;
#endif
}
/*
* JNI registration.
*/
static JNINativeMethod gMethods[] = {
/* name, signature, funcPtr */
{ "setCurrentTimeMillis", "(J)Z",
(void*) android_os_SystemClock_setCurrentTimeMillis },
{ "uptimeMillis", "()J",
(void*) android_os_SystemClock_uptimeMillis },
{ "elapsedRealtime", "()J",
(void*) android_os_SystemClock_elapsedRealtime },
{ "currentThreadTimeMillis", "()J",
(void*) android_os_SystemClock_currentThreadTimeMillis },
};
int register_android_os_SystemClock(JNIEnv* env)
{
return AndroidRuntime::registerNativeMethods(env,
"android/os/SystemClock", gMethods, NELEM(gMethods));
}
}; // namespace android
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