John Reck | b2264c2 | 2016-11-21 15:23:34 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2016 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #include <jni.h> |
| 18 | |
| 19 | #define NELEM(x) ((int) (sizeof(x) / sizeof((x)[0]))) |
| 20 | |
| 21 | static void jintarrayArgumentNoop(JNIEnv*, jclass, jintArray, jint) { |
| 22 | } |
| 23 | |
| 24 | static jint jintarrayGetLength(JNIEnv* env, jclass, jintArray jarray) { |
| 25 | const jsize len = env->GetArrayLength(jarray); |
| 26 | return static_cast<jint>(len); |
| 27 | } |
| 28 | |
| 29 | static jint jintarrayCriticalAccess(JNIEnv* env, jclass, jintArray jarray, jint index) { |
| 30 | const jsize len = env->GetArrayLength(jarray); |
| 31 | if (index < 0 || index >= len) { |
| 32 | return -1; |
| 33 | } |
| 34 | jint* data = (jint*) env->GetPrimitiveArrayCritical(jarray, 0); |
| 35 | jint ret = data[index]; |
| 36 | env->ReleasePrimitiveArrayCritical(jarray, data, 0); |
| 37 | return ret; |
| 38 | } |
| 39 | |
| 40 | static jint jintarrayBasicAccess(JNIEnv* env, jclass, jintArray jarray, jint index) { |
| 41 | const jsize len = env->GetArrayLength(jarray); |
| 42 | if (index < 0 || index >= len) { |
| 43 | return -1; |
| 44 | } |
| 45 | jint* data = env->GetIntArrayElements(jarray, 0); |
| 46 | jint ret = data[index]; |
| 47 | env->ReleaseIntArrayElements(jarray, data, 0); |
| 48 | return ret; |
| 49 | } |
| 50 | |
| 51 | static const JNINativeMethod sMethods[] = { |
| 52 | {"jintarrayArgumentNoop", "([II)V", (void *) jintarrayArgumentNoop}, |
| 53 | {"jintarrayGetLength", "([I)I", (void *) jintarrayGetLength}, |
| 54 | {"jintarrayCriticalAccess", "([II)I", (void *) jintarrayCriticalAccess}, |
| 55 | {"jintarrayBasicAccess", "([II)I", (void *) jintarrayBasicAccess}, |
| 56 | }; |
| 57 | |
| 58 | static int registerNativeMethods(JNIEnv* env, const char* className, |
| 59 | const JNINativeMethod* gMethods, int numMethods) { |
| 60 | jclass clazz = env->FindClass(className); |
| 61 | if (clazz == NULL) { |
| 62 | return JNI_FALSE; |
| 63 | } |
| 64 | if (env->RegisterNatives(clazz, gMethods, numMethods) < 0) { |
| 65 | return JNI_FALSE; |
| 66 | } |
| 67 | return JNI_TRUE; |
| 68 | } |
| 69 | |
| 70 | jint JNI_OnLoad(JavaVM* jvm, void*) { |
| 71 | JNIEnv *env = NULL; |
| 72 | if (jvm->GetEnv((void**) &env, JNI_VERSION_1_6)) { |
| 73 | return JNI_ERR; |
| 74 | } |
| 75 | |
Colin Cross | 52f6ba9 | 2017-02-26 08:55:26 -0800 | [diff] [blame] | 76 | if (registerNativeMethods(env, "android/perftests/SystemPerfTest", |
John Reck | b2264c2 | 2016-11-21 15:23:34 -0800 | [diff] [blame] | 77 | sMethods, NELEM(sMethods)) == -1) { |
| 78 | return JNI_ERR; |
| 79 | } |
| 80 | |
| 81 | return JNI_VERSION_1_6; |
| 82 | } |