James Robinson | 646469d | 2014-10-03 15:33:28 -0700 | [diff] [blame] | 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 |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #include "base/android/jni_weak_ref.h" |
| 6 | |
| 7 | #include "base/android/jni_android.h" |
| 8 | #include "base/logging.h" |
| 9 | |
| 10 | using base::android::AttachCurrentThread; |
| 11 | |
| 12 | JavaObjectWeakGlobalRef::JavaObjectWeakGlobalRef() |
| 13 | : obj_(NULL) { |
| 14 | } |
| 15 | |
| 16 | JavaObjectWeakGlobalRef::JavaObjectWeakGlobalRef( |
| 17 | const JavaObjectWeakGlobalRef& orig) |
| 18 | : obj_(NULL) { |
| 19 | Assign(orig); |
| 20 | } |
| 21 | |
| 22 | JavaObjectWeakGlobalRef::JavaObjectWeakGlobalRef(JNIEnv* env, jobject obj) |
| 23 | : obj_(env->NewWeakGlobalRef(obj)) { |
| 24 | DCHECK(obj_); |
| 25 | } |
| 26 | |
| 27 | JavaObjectWeakGlobalRef::~JavaObjectWeakGlobalRef() { |
| 28 | reset(); |
| 29 | } |
| 30 | |
| 31 | void JavaObjectWeakGlobalRef::operator=(const JavaObjectWeakGlobalRef& rhs) { |
| 32 | Assign(rhs); |
| 33 | } |
| 34 | |
| 35 | void JavaObjectWeakGlobalRef::reset() { |
| 36 | if (obj_) { |
| 37 | AttachCurrentThread()->DeleteWeakGlobalRef(obj_); |
| 38 | obj_ = NULL; |
| 39 | } |
| 40 | } |
| 41 | |
| 42 | base::android::ScopedJavaLocalRef<jobject> |
| 43 | JavaObjectWeakGlobalRef::get(JNIEnv* env) const { |
| 44 | return GetRealObject(env, obj_); |
| 45 | } |
| 46 | |
| 47 | base::android::ScopedJavaLocalRef<jobject> GetRealObject( |
| 48 | JNIEnv* env, jweak obj) { |
| 49 | jobject real = NULL; |
| 50 | if (obj) { |
| 51 | real = env->NewLocalRef(obj); |
| 52 | if (!real) |
| 53 | DLOG(ERROR) << "The real object has been deleted!"; |
| 54 | } |
| 55 | return base::android::ScopedJavaLocalRef<jobject>(env, real); |
| 56 | } |
| 57 | |
| 58 | void JavaObjectWeakGlobalRef::Assign(const JavaObjectWeakGlobalRef& other) { |
| 59 | if (&other == this) |
| 60 | return; |
| 61 | |
| 62 | JNIEnv* env = AttachCurrentThread(); |
| 63 | if (obj_) |
| 64 | env->DeleteWeakGlobalRef(obj_); |
| 65 | |
| 66 | obj_ = other.obj_ ? env->NewWeakGlobalRef(other.obj_) : NULL; |
| 67 | } |