1// Copyright (c) 2012 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/scoped_java_ref.h" 6 7#include "base/android/jni_android.h" 8#include "base/logging.h" 9 10namespace base { 11namespace android { 12namespace { 13 14const int kDefaultLocalFrameCapacity = 16; 15 16} // namespace 17 18ScopedJavaLocalFrame::ScopedJavaLocalFrame(JNIEnv* env) : env_(env) { 19 int failed = env_->PushLocalFrame(kDefaultLocalFrameCapacity); 20 DCHECK(!failed); 21} 22 23ScopedJavaLocalFrame::ScopedJavaLocalFrame(JNIEnv* env, int capacity) 24 : env_(env) { 25 int failed = env_->PushLocalFrame(capacity); 26 DCHECK(!failed); 27} 28 29ScopedJavaLocalFrame::~ScopedJavaLocalFrame() { 30 env_->PopLocalFrame(nullptr); 31} 32 33#if DCHECK_IS_ON() 34// This constructor is inlined when DCHECKs are disabled; don't add anything 35// else here. 36JavaRef<jobject>::JavaRef(JNIEnv* env, jobject obj) : obj_(obj) { 37 if (obj) { 38 DCHECK(env && env->GetObjectRefType(obj) == JNILocalRefType); 39 } 40} 41#endif 42 43JNIEnv* JavaRef<jobject>::SetNewLocalRef(JNIEnv* env, jobject obj) { 44 if (!env) { 45 env = AttachCurrentThread(); 46 } else { 47 DCHECK_EQ(env, AttachCurrentThread()); // Is |env| on correct thread. 48 } 49 if (obj) 50 obj = env->NewLocalRef(obj); 51 if (obj_) 52 env->DeleteLocalRef(obj_); 53 obj_ = obj; 54 return env; 55} 56 57void JavaRef<jobject>::SetNewGlobalRef(JNIEnv* env, jobject obj) { 58 if (!env) { 59 env = AttachCurrentThread(); 60 } else { 61 DCHECK_EQ(env, AttachCurrentThread()); // Is |env| on correct thread. 62 } 63 if (obj) 64 obj = env->NewGlobalRef(obj); 65 if (obj_) 66 env->DeleteGlobalRef(obj_); 67 obj_ = obj; 68} 69 70void JavaRef<jobject>::ResetLocalRef(JNIEnv* env) { 71 if (obj_) { 72 DCHECK_EQ(env, AttachCurrentThread()); // Is |env| on correct thread. 73 env->DeleteLocalRef(obj_); 74 obj_ = nullptr; 75 } 76} 77 78void JavaRef<jobject>::ResetGlobalRef() { 79 if (obj_) { 80 AttachCurrentThread()->DeleteGlobalRef(obj_); 81 obj_ = nullptr; 82 } 83} 84 85jobject JavaRef<jobject>::ReleaseInternal() { 86 jobject obj = obj_; 87 obj_ = NULL; 88 return obj; 89} 90 91} // namespace android 92} // namespace base 93