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- // 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.
- #include "base/android/scoped_java_ref.h"
- #include "base/android/jni_android.h"
- #include "base/check_op.h"
- namespace base {
- namespace android {
- namespace {
- const int kDefaultLocalFrameCapacity = 16;
- } // namespace
- ScopedJavaLocalFrame::ScopedJavaLocalFrame(JNIEnv* env) : env_(env) {
- int failed = env_->PushLocalFrame(kDefaultLocalFrameCapacity);
- DCHECK(!failed);
- }
- ScopedJavaLocalFrame::ScopedJavaLocalFrame(JNIEnv* env, int capacity)
- : env_(env) {
- int failed = env_->PushLocalFrame(capacity);
- DCHECK(!failed);
- }
- ScopedJavaLocalFrame::~ScopedJavaLocalFrame() {
- env_->PopLocalFrame(nullptr);
- }
- #if DCHECK_IS_ON()
- // This constructor is inlined when DCHECKs are disabled; don't add anything
- // else here.
- JavaRef<jobject>::JavaRef(JNIEnv* env, jobject obj) : obj_(obj) {
- if (obj) {
- DCHECK(env && env->GetObjectRefType(obj) == JNILocalRefType);
- }
- }
- #endif
- JNIEnv* JavaRef<jobject>::SetNewLocalRef(JNIEnv* env, jobject obj) {
- if (!env) {
- env = AttachCurrentThread();
- } else {
- DCHECK_EQ(env, AttachCurrentThread()); // Is |env| on correct thread.
- }
- if (obj)
- obj = env->NewLocalRef(obj);
- if (obj_)
- env->DeleteLocalRef(obj_);
- obj_ = obj;
- return env;
- }
- void JavaRef<jobject>::SetNewGlobalRef(JNIEnv* env, jobject obj) {
- if (!env) {
- env = AttachCurrentThread();
- } else {
- DCHECK_EQ(env, AttachCurrentThread()); // Is |env| on correct thread.
- }
- if (obj)
- obj = env->NewGlobalRef(obj);
- if (obj_)
- env->DeleteGlobalRef(obj_);
- obj_ = obj;
- }
- void JavaRef<jobject>::ResetLocalRef(JNIEnv* env) {
- if (obj_) {
- DCHECK_EQ(env, AttachCurrentThread()); // Is |env| on correct thread.
- env->DeleteLocalRef(obj_);
- obj_ = nullptr;
- }
- }
- void JavaRef<jobject>::ResetGlobalRef() {
- if (obj_) {
- AttachCurrentThread()->DeleteGlobalRef(obj_);
- obj_ = nullptr;
- }
- }
- jobject JavaRef<jobject>::ReleaseInternal() {
- jobject obj = obj_;
- obj_ = nullptr;
- return obj;
- }
- } // namespace android
- } // namespace base
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