| /* |
| * Copyright (C) 2016 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. |
| */ |
| |
| #include <jni.h> |
| |
| #define NELEM(x) ((int) (sizeof(x) / sizeof((x)[0]))) |
| |
| static void jintarrayArgumentNoop(JNIEnv*, jclass, jintArray, jint) { |
| } |
| |
| static jint jintarrayGetLength(JNIEnv* env, jclass, jintArray jarray) { |
| const jsize len = env->GetArrayLength(jarray); |
| return static_cast<jint>(len); |
| } |
| |
| static jint jintarrayCriticalAccess(JNIEnv* env, jclass, jintArray jarray, jint index) { |
| const jsize len = env->GetArrayLength(jarray); |
| if (index < 0 || index >= len) { |
| return -1; |
| } |
| jint* data = (jint*) env->GetPrimitiveArrayCritical(jarray, 0); |
| jint ret = data[index]; |
| env->ReleasePrimitiveArrayCritical(jarray, data, 0); |
| return ret; |
| } |
| |
| static jint jintarrayBasicAccess(JNIEnv* env, jclass, jintArray jarray, jint index) { |
| const jsize len = env->GetArrayLength(jarray); |
| if (index < 0 || index >= len) { |
| return -1; |
| } |
| jint* data = env->GetIntArrayElements(jarray, 0); |
| jint ret = data[index]; |
| env->ReleaseIntArrayElements(jarray, data, 0); |
| return ret; |
| } |
| |
| static const JNINativeMethod sMethods[] = { |
| {"jintarrayArgumentNoop", "([II)V", (void *) jintarrayArgumentNoop}, |
| {"jintarrayGetLength", "([I)I", (void *) jintarrayGetLength}, |
| {"jintarrayCriticalAccess", "([II)I", (void *) jintarrayCriticalAccess}, |
| {"jintarrayBasicAccess", "([II)I", (void *) jintarrayBasicAccess}, |
| }; |
| |
| static int registerNativeMethods(JNIEnv* env, const char* className, |
| const JNINativeMethod* gMethods, int numMethods) { |
| jclass clazz = env->FindClass(className); |
| if (clazz == NULL) { |
| return JNI_FALSE; |
| } |
| if (env->RegisterNatives(clazz, gMethods, numMethods) < 0) { |
| return JNI_FALSE; |
| } |
| return JNI_TRUE; |
| } |
| |
| jint JNI_OnLoad(JavaVM* jvm, void*) { |
| JNIEnv *env = NULL; |
| if (jvm->GetEnv((void**) &env, JNI_VERSION_1_6)) { |
| return JNI_ERR; |
| } |
| |
| if (registerNativeMethods(env, "android/perftests/SystemPerfTest", |
| sMethods, NELEM(sMethods)) == -1) { |
| return JNI_ERR; |
| } |
| |
| return JNI_VERSION_1_6; |
| } |