1 /*
2 * Copyright (C) 2014 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 #define LOG_TAG "SplitApp"
18
19 #include <android/log.h>
20 #include <stdio.h>
21
22 #include "jni.h"
23
24 #define LOGE(...) __android_log_print(ANDROID_LOG_ERROR,LOG_TAG,__VA_ARGS__)
25 #define LOGI(...) __android_log_print(ANDROID_LOG_INFO,LOG_TAG,__VA_ARGS__)
26
27
add(JNIEnv * env,jobject thiz,jint a,jint b)28 static jint add(JNIEnv *env, jobject thiz, jint a, jint b) {
29 int result = a + b;
30 LOGI("%d + %d = %d", a, b, result);
31 return result;
32 }
33
arch(JNIEnv * env,jobject thiz)34 static jstring arch(JNIEnv *env, jobject thiz) {
35 return env->NewStringUTF(__ANDROID_ARCH__);
36 }
37
38 static const char *classPathName = "com/android/cts/splitapp/Native";
39
40 static JNINativeMethod methods[] = {
41 {"add", "(II)I", (void*)add },
42 {"arch", "()Ljava/lang/String;", (void*)arch },
43 };
44
registerNativeMethods(JNIEnv * env,const char * className,JNINativeMethod * gMethods,int numMethods)45 static int registerNativeMethods(JNIEnv* env, const char* className, JNINativeMethod* gMethods, int numMethods) {
46 jclass clazz;
47
48 clazz = env->FindClass(className);
49 if (clazz == NULL) {
50 LOGE("Native registration unable to find class '%s'", className);
51 return JNI_FALSE;
52 }
53 if (env->RegisterNatives(clazz, gMethods, numMethods) < 0) {
54 LOGE("RegisterNatives failed for '%s'", className);
55 return JNI_FALSE;
56 }
57
58 return JNI_TRUE;
59 }
60
registerNatives(JNIEnv * env)61 static int registerNatives(JNIEnv* env) {
62 if (!registerNativeMethods(env, classPathName, methods, sizeof(methods) / sizeof(methods[0]))) {
63 return JNI_FALSE;
64 }
65
66 return JNI_TRUE;
67 }
68
69 typedef union {
70 JNIEnv* env;
71 void* venv;
72 } UnionJNIEnvToVoid;
73
JNI_OnLoad(JavaVM * vm,void * reserved)74 jint JNI_OnLoad(JavaVM* vm, void* reserved) {
75 UnionJNIEnvToVoid uenv;
76 uenv.venv = NULL;
77 jint result = -1;
78 JNIEnv* env = NULL;
79
80 LOGI("JNI_OnLoad");
81
82 if (vm->GetEnv(&uenv.venv, JNI_VERSION_1_4) != JNI_OK) {
83 LOGE("ERROR: GetEnv failed");
84 goto bail;
85 }
86 env = uenv.env;
87
88 if (registerNatives(env) != JNI_TRUE) {
89 LOGE("ERROR: registerNatives failed");
90 goto bail;
91 }
92
93 result = JNI_VERSION_1_4;
94
95 bail:
96 return result;
97 }
98