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| 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 | |
| 10 namespace base { | |
| 11 namespace android { | |
| 12 namespace { | |
| 13 | |
| 14 const int kDefaultLocalFrameCapacity = 16; | |
| 15 | |
| 16 } // namespace | |
| 17 | |
| 18 ScopedJavaLocalFrame::ScopedJavaLocalFrame(JNIEnv* env) : env_(env) { | |
| 19 int failed = env_->PushLocalFrame(kDefaultLocalFrameCapacity); | |
| 20 DCHECK(!failed); | |
| 21 } | |
| 22 | |
| 23 ScopedJavaLocalFrame::ScopedJavaLocalFrame(JNIEnv* env, int capacity) | |
| 24 : env_(env) { | |
| 25 int failed = env_->PushLocalFrame(capacity); | |
| 26 DCHECK(!failed); | |
| 27 } | |
| 28 | |
| 29 ScopedJavaLocalFrame::~ScopedJavaLocalFrame() { env_->PopLocalFrame(NULL); } | |
| 30 | |
| 31 JavaRef<jobject>::JavaRef() : obj_(NULL) {} | |
| 32 | |
| 33 JavaRef<jobject>::JavaRef(JNIEnv* env, jobject obj) : obj_(obj) { | |
| 34 if (obj) { | |
| 35 DCHECK(env && env->GetObjectRefType(obj) == JNILocalRefType); | |
| 36 } | |
| 37 } | |
| 38 | |
| 39 JavaRef<jobject>::~JavaRef() { | |
| 40 } | |
| 41 | |
| 42 JNIEnv* JavaRef<jobject>::SetNewLocalRef(JNIEnv* env, jobject obj) { | |
| 43 if (!env) { | |
| 44 env = AttachCurrentThread(); | |
| 45 } else { | |
| 46 DCHECK_EQ(env, AttachCurrentThread()); // Is |env| on correct thread. | |
| 47 } | |
| 48 if (obj) | |
| 49 obj = env->NewLocalRef(obj); | |
| 50 if (obj_) | |
| 51 env->DeleteLocalRef(obj_); | |
| 52 obj_ = obj; | |
| 53 return env; | |
| 54 } | |
| 55 | |
| 56 void JavaRef<jobject>::SetNewGlobalRef(JNIEnv* env, jobject obj) { | |
| 57 if (!env) { | |
| 58 env = AttachCurrentThread(); | |
| 59 } else { | |
| 60 DCHECK_EQ(env, AttachCurrentThread()); // Is |env| on correct thread. | |
| 61 } | |
| 62 if (obj) | |
| 63 obj = env->NewGlobalRef(obj); | |
| 64 if (obj_) | |
| 65 env->DeleteGlobalRef(obj_); | |
| 66 obj_ = obj; | |
| 67 } | |
| 68 | |
| 69 void JavaRef<jobject>::ResetLocalRef(JNIEnv* env) { | |
| 70 if (obj_) { | |
| 71 DCHECK_EQ(env, AttachCurrentThread()); // Is |env| on correct thread. | |
| 72 env->DeleteLocalRef(obj_); | |
| 73 obj_ = NULL; | |
| 74 } | |
| 75 } | |
| 76 | |
| 77 void JavaRef<jobject>::ResetGlobalRef() { | |
| 78 if (obj_) { | |
| 79 AttachCurrentThread()->DeleteGlobalRef(obj_); | |
| 80 obj_ = NULL; | |
| 81 } | |
| 82 } | |
| 83 | |
| 84 jobject JavaRef<jobject>::ReleaseInternal() { | |
| 85 jobject obj = obj_; | |
| 86 obj_ = NULL; | |
| 87 return obj; | |
| 88 } | |
| 89 | |
| 90 } // namespace android | |
| 91 } // namespace base | |
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