80 lines
2.0 KiB
C++
80 lines
2.0 KiB
C++
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// Copyright 2014 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "base/android/jni_weak_ref.h"
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#include <utility>
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#include "base/android/jni_android.h"
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#include "base/logging.h"
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using base::android::AttachCurrentThread;
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JavaObjectWeakGlobalRef::JavaObjectWeakGlobalRef() : obj_(nullptr) {}
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JavaObjectWeakGlobalRef::JavaObjectWeakGlobalRef(
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const JavaObjectWeakGlobalRef& orig)
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: obj_(nullptr) {
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Assign(orig);
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}
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JavaObjectWeakGlobalRef::JavaObjectWeakGlobalRef(
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JavaObjectWeakGlobalRef&& orig) noexcept
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: obj_(orig.obj_) {
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orig.obj_ = nullptr;
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}
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JavaObjectWeakGlobalRef::JavaObjectWeakGlobalRef(JNIEnv* env, jobject obj)
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: obj_(env->NewWeakGlobalRef(obj)) {
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}
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JavaObjectWeakGlobalRef::JavaObjectWeakGlobalRef(
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JNIEnv* env,
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const base::android::JavaRef<jobject>& obj)
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: obj_(env->NewWeakGlobalRef(obj.obj())) {
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}
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JavaObjectWeakGlobalRef::~JavaObjectWeakGlobalRef() {
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reset();
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}
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void JavaObjectWeakGlobalRef::operator=(const JavaObjectWeakGlobalRef& rhs) {
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Assign(rhs);
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}
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void JavaObjectWeakGlobalRef::operator=(JavaObjectWeakGlobalRef&& rhs) {
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std::swap(obj_, rhs.obj_);
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}
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void JavaObjectWeakGlobalRef::reset() {
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if (obj_) {
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AttachCurrentThread()->DeleteWeakGlobalRef(obj_);
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obj_ = nullptr;
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}
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}
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base::android::ScopedJavaLocalRef<jobject>
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JavaObjectWeakGlobalRef::get(JNIEnv* env) const {
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return GetRealObject(env, obj_);
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}
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base::android::ScopedJavaLocalRef<jobject> GetRealObject(
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JNIEnv* env, jweak obj) {
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jobject real = nullptr;
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if (obj)
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real = env->NewLocalRef(obj);
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return base::android::ScopedJavaLocalRef<jobject>(env, real);
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}
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void JavaObjectWeakGlobalRef::Assign(const JavaObjectWeakGlobalRef& other) {
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if (&other == this)
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return;
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JNIEnv* env = AttachCurrentThread();
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if (obj_)
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env->DeleteWeakGlobalRef(obj_);
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obj_ = other.obj_ ? env->NewWeakGlobalRef(other.obj_) : nullptr;
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}
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