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 return base::android::ScopedJavaLocalRef<jobject>(env, real); 53 } 54 55 void JavaObjectWeakGlobalRef::Assign(const JavaObjectWeakGlobalRef& other) { 56 if (&other == this) 57 return; 58 59 JNIEnv* env = AttachCurrentThread(); 60 if (obj_) 61 env->DeleteWeakGlobalRef(obj_); 62 63 obj_ = other.obj_ ? env->NewWeakGlobalRef(other.obj_) : NULL; 64 } 65
