1 /*
2  * Copyright (C) 2007 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 /** JNI utils for nativehelper-internal use. */
18 
19 #pragma once
20 
21 #include <jni.h>
22 
23 #if defined(__cplusplus)
24 
25 #if !defined(DISALLOW_COPY_AND_ASSIGN)
26 // DISALLOW_COPY_AND_ASSIGN disallows the copy and operator= functions. It goes in the private:
27 // declarations in a class.
28 #define DISALLOW_COPY_AND_ASSIGN(TypeName) \
29   TypeName(const TypeName&) = delete;  \
30   void operator=(const TypeName&) = delete
31 #endif  // !defined(DISALLOW_COPY_AND_ASSIGN)
32 
33 // This seems a header-only include. Provide NPE throwing.
jniThrowNullPointerException(JNIEnv * env)34 static inline int jniThrowNullPointerException(JNIEnv* env) {
35     if (env->ExceptionCheck()) {
36         // Drop any pending exception.
37         env->ExceptionClear();
38     }
39 
40     jclass e_class = env->FindClass("java/lang/NullPointerException");
41     if (e_class == nullptr) {
42         return -1;
43     }
44 
45     if (env->ThrowNew(e_class, nullptr) != JNI_OK) {
46         env->DeleteLocalRef(e_class);
47         return -1;
48     }
49 
50     env->DeleteLocalRef(e_class);
51     return 0;
52 }
53 
54 #endif  // defined(__cplusplus)
55 
56