blob: 22883cbbcfcab5d4d1f6a559a6e38968cbd43d21 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
|
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef BASE_ANDROID_JNI_HELPER_H_
#define BASE_ANDROID_JNI_HELPER_H_
#include <jni.h>
#include "base/android/scoped_java_ref.h"
// Manages WeakGlobalRef lifecycle.
// This class is not thread-safe w.r.t. get() and reset(). Multiple threads may
// safely use get() concurrently, but if the user calls reset() (or of course,
// calls the destructor) they'll need to provide their own synchronization.
class JavaObjectWeakGlobalRef {
public:
JavaObjectWeakGlobalRef();
JavaObjectWeakGlobalRef(const JavaObjectWeakGlobalRef& orig);
JavaObjectWeakGlobalRef(JNIEnv* env, jobject obj);
virtual ~JavaObjectWeakGlobalRef();
void operator=(const JavaObjectWeakGlobalRef& rhs);
base::android::ScopedJavaLocalRef<jobject> get(JNIEnv* env) const;
void reset();
private:
void Assign(const JavaObjectWeakGlobalRef& rhs);
jweak obj_;
};
// Get the real object stored in the weak reference returned as a
// ScopedJavaLocalRef.
base::android::ScopedJavaLocalRef<jobject> GetRealObject(
JNIEnv* env, jweak obj);
#endif // BASE_ANDROID_JNI_HELPER_H_
|
