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