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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef BASE_ANDROID_SCOPED_JAVA_REF_H_ | 5 #ifndef BASE_ANDROID_SCOPED_JAVA_REF_H_ |
6 #define BASE_ANDROID_SCOPED_JAVA_REF_H_ | 6 #define BASE_ANDROID_SCOPED_JAVA_REF_H_ |
7 | 7 |
8 #include <jni.h> | 8 #include <jni.h> |
9 #include <stddef.h> | 9 #include <stddef.h> |
10 | 10 |
11 #include "base/base_export.h" | 11 #include "base/base_export.h" |
12 #include "base/basictypes.h" | 12 #include "base/basictypes.h" |
| 13 #include "base/logging.h" |
13 | 14 |
14 namespace base { | 15 namespace base { |
15 namespace android { | 16 namespace android { |
16 | 17 |
17 // Creates a new local reference frame, in which at least a given number of | 18 // Creates a new local reference frame, in which at least a given number of |
18 // local references can be created. Note that local references already created | 19 // local references can be created. Note that local references already created |
19 // in previous local frames are still valid in the current local frame. | 20 // in previous local frames are still valid in the current local frame. |
20 class BASE_EXPORT ScopedJavaLocalFrame { | 21 class BASE_EXPORT ScopedJavaLocalFrame { |
21 public: | 22 public: |
22 explicit ScopedJavaLocalFrame(JNIEnv* env); | 23 explicit ScopedJavaLocalFrame(JNIEnv* env); |
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38 // other JavaRef<> template types. This allows you to e.g. pass | 39 // other JavaRef<> template types. This allows you to e.g. pass |
39 // ScopedJavaLocalRef<jstring> into a function taking const JavaRef<jobject>& | 40 // ScopedJavaLocalRef<jstring> into a function taking const JavaRef<jobject>& |
40 template<> | 41 template<> |
41 class BASE_EXPORT JavaRef<jobject> { | 42 class BASE_EXPORT JavaRef<jobject> { |
42 public: | 43 public: |
43 jobject obj() const { return obj_; } | 44 jobject obj() const { return obj_; } |
44 | 45 |
45 bool is_null() const { return obj_ == NULL; } | 46 bool is_null() const { return obj_ == NULL; } |
46 | 47 |
47 protected: | 48 protected: |
48 // Initializes a NULL reference. | 49 // Initializes a NULL reference. Don't add anything else here; it's inlined. |
49 JavaRef(); | 50 JavaRef() : obj_(NULL) {} |
50 | 51 |
51 // Takes ownership of the |obj| reference passed; requires it to be a local | 52 // Takes ownership of the |obj| reference passed; requires it to be a local |
52 // reference type. | 53 // reference type. |
| 54 #if DCHECK_IS_ON() |
| 55 // Implementation contains a DCHECK; implement out-of-line when DCHECK_IS_ON. |
53 JavaRef(JNIEnv* env, jobject obj); | 56 JavaRef(JNIEnv* env, jobject obj); |
| 57 #else |
| 58 // Don't add anything else here; it's inlined. |
| 59 JavaRef(JNIEnv* env, jobject obj) : obj_(obj) {} |
| 60 #endif |
54 | 61 |
55 ~JavaRef(); | 62 // Don't add anything else here; it's inlined. |
| 63 ~JavaRef() {} |
56 | 64 |
57 // The following are implementation detail convenience methods, for | 65 // The following are implementation detail convenience methods, for |
58 // use by the sub-classes. | 66 // use by the sub-classes. |
59 JNIEnv* SetNewLocalRef(JNIEnv* env, jobject obj); | 67 JNIEnv* SetNewLocalRef(JNIEnv* env, jobject obj); |
60 void SetNewGlobalRef(JNIEnv* env, jobject obj); | 68 void SetNewGlobalRef(JNIEnv* env, jobject obj); |
61 void ResetLocalRef(JNIEnv* env); | 69 void ResetLocalRef(JNIEnv* env); |
62 void ResetGlobalRef(); | 70 void ResetGlobalRef(); |
63 jobject ReleaseInternal(); | 71 jobject ReleaseInternal(); |
64 | 72 |
65 private: | 73 private: |
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208 // global reference when it is done with it. | 216 // global reference when it is done with it. |
209 T Release() { | 217 T Release() { |
210 return static_cast<T>(this->ReleaseInternal()); | 218 return static_cast<T>(this->ReleaseInternal()); |
211 } | 219 } |
212 }; | 220 }; |
213 | 221 |
214 } // namespace android | 222 } // namespace android |
215 } // namespace base | 223 } // namespace base |
216 | 224 |
217 #endif // BASE_ANDROID_SCOPED_JAVA_REF_H_ | 225 #endif // BASE_ANDROID_SCOPED_JAVA_REF_H_ |
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