auto import from //depot/cupcake/@135843
diff --git a/core/jni/android_os_SystemClock.cpp b/core/jni/android_os_SystemClock.cpp
new file mode 100644
index 0000000..ffd0c1e
--- /dev/null
+++ b/core/jni/android_os_SystemClock.cpp
@@ -0,0 +1,103 @@
+/*
+ * 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
+