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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_JNI_HELPER_H_ | 5 #ifndef BASE_ANDROID_JNI_HELPER_H_ |
6 #define BASE_ANDROID_JNI_HELPER_H_ | 6 #define BASE_ANDROID_JNI_HELPER_H_ |
7 | 7 |
8 #include <jni.h> | 8 #include <jni.h> |
9 | 9 |
| 10 #include "base/base_export.h" |
10 #include "base/android/scoped_java_ref.h" | 11 #include "base/android/scoped_java_ref.h" |
11 | 12 |
12 // Manages WeakGlobalRef lifecycle. | 13 // Manages WeakGlobalRef lifecycle. |
13 // This class is not thread-safe w.r.t. get() and reset(). Multiple threads may | 14 // This class is not thread-safe w.r.t. get() and reset(). Multiple threads may |
14 // safely use get() concurrently, but if the user calls reset() (or of course, | 15 // safely use get() concurrently, but if the user calls reset() (or of course, |
15 // calls the destructor) they'll need to provide their own synchronization. | 16 // calls the destructor) they'll need to provide their own synchronization. |
16 class JavaObjectWeakGlobalRef { | 17 class BASE_EXPORT JavaObjectWeakGlobalRef { |
17 public: | 18 public: |
18 JavaObjectWeakGlobalRef(); | 19 JavaObjectWeakGlobalRef(); |
19 JavaObjectWeakGlobalRef(const JavaObjectWeakGlobalRef& orig); | 20 JavaObjectWeakGlobalRef(const JavaObjectWeakGlobalRef& orig); |
20 JavaObjectWeakGlobalRef(JNIEnv* env, jobject obj); | 21 JavaObjectWeakGlobalRef(JNIEnv* env, jobject obj); |
21 virtual ~JavaObjectWeakGlobalRef(); | 22 virtual ~JavaObjectWeakGlobalRef(); |
22 | 23 |
23 void operator=(const JavaObjectWeakGlobalRef& rhs); | 24 void operator=(const JavaObjectWeakGlobalRef& rhs); |
24 | 25 |
25 base::android::ScopedJavaLocalRef<jobject> get(JNIEnv* env) const; | 26 base::android::ScopedJavaLocalRef<jobject> get(JNIEnv* env) const; |
26 | 27 |
27 void reset(); | 28 void reset(); |
28 | 29 |
29 private: | 30 private: |
30 void Assign(const JavaObjectWeakGlobalRef& rhs); | 31 void Assign(const JavaObjectWeakGlobalRef& rhs); |
31 | 32 |
32 jweak obj_; | 33 jweak obj_; |
33 }; | 34 }; |
34 | 35 |
35 // Get the real object stored in the weak reference returned as a | 36 // Get the real object stored in the weak reference returned as a |
36 // ScopedJavaLocalRef. | 37 // ScopedJavaLocalRef. |
37 base::android::ScopedJavaLocalRef<jobject> GetRealObject( | 38 BASE_EXPORT base::android::ScopedJavaLocalRef<jobject> GetRealObject( |
38 JNIEnv* env, jweak obj); | 39 JNIEnv* env, jweak obj); |
39 | 40 |
40 #endif // BASE_ANDROID_JNI_HELPER_H_ | 41 #endif // BASE_ANDROID_JNI_HELPER_H_ |
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