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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 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_WEAK_REF_H_ | 5 #ifndef BASE_ANDROID_JNI_WEAK_REF_H_ |
6 #define BASE_ANDROID_JNI_WEAK_REF_H_ | 6 #define BASE_ANDROID_JNI_WEAK_REF_H_ |
7 | 7 |
8 #include <jni.h> | 8 #include <jni.h> |
9 | 9 |
10 #include "base/android/scoped_java_ref.h" | 10 #include "base/android/scoped_java_ref.h" |
11 #include "base/base_export.h" | 11 #include "base/base_export.h" |
12 | 12 |
13 // Manages WeakGlobalRef lifecycle. | 13 // Manages WeakGlobalRef lifecycle. |
14 // 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 |
15 // 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, |
16 // calls the destructor) they'll need to provide their own synchronization. | 16 // calls the destructor) they'll need to provide their own synchronization. |
17 class BASE_EXPORT JavaObjectWeakGlobalRef { | 17 class BASE_EXPORT JavaObjectWeakGlobalRef { |
18 public: | 18 public: |
19 JavaObjectWeakGlobalRef(); | 19 JavaObjectWeakGlobalRef(); |
20 JavaObjectWeakGlobalRef(const JavaObjectWeakGlobalRef& orig); | 20 JavaObjectWeakGlobalRef(const JavaObjectWeakGlobalRef& orig); |
21 JavaObjectWeakGlobalRef(JavaObjectWeakGlobalRef&& orig); | 21 JavaObjectWeakGlobalRef(JavaObjectWeakGlobalRef&& orig) noexcept; |
22 JavaObjectWeakGlobalRef(JNIEnv* env, jobject obj); | 22 JavaObjectWeakGlobalRef(JNIEnv* env, jobject obj); |
23 JavaObjectWeakGlobalRef(JNIEnv* env, | 23 JavaObjectWeakGlobalRef(JNIEnv* env, |
24 const base::android::JavaRef<jobject>& obj); | 24 const base::android::JavaRef<jobject>& obj); |
25 virtual ~JavaObjectWeakGlobalRef(); | 25 virtual ~JavaObjectWeakGlobalRef(); |
26 | 26 |
27 void operator=(const JavaObjectWeakGlobalRef& rhs); | 27 void operator=(const JavaObjectWeakGlobalRef& rhs); |
28 void operator=(JavaObjectWeakGlobalRef&& rhs); | 28 void operator=(JavaObjectWeakGlobalRef&& rhs); |
29 | 29 |
30 base::android::ScopedJavaLocalRef<jobject> get(JNIEnv* env) const; | 30 base::android::ScopedJavaLocalRef<jobject> get(JNIEnv* env) const; |
31 | 31 |
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42 | 42 |
43 jweak obj_; | 43 jweak obj_; |
44 }; | 44 }; |
45 | 45 |
46 // Get the real object stored in the weak reference returned as a | 46 // Get the real object stored in the weak reference returned as a |
47 // ScopedJavaLocalRef. | 47 // ScopedJavaLocalRef. |
48 BASE_EXPORT base::android::ScopedJavaLocalRef<jobject> GetRealObject( | 48 BASE_EXPORT base::android::ScopedJavaLocalRef<jobject> GetRealObject( |
49 JNIEnv* env, jweak obj); | 49 JNIEnv* env, jweak obj); |
50 | 50 |
51 #endif // BASE_ANDROID_JNI_WEAK_REF_H_ | 51 #endif // BASE_ANDROID_JNI_WEAK_REF_H_ |
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