1 /*
2  * Copyright (C) 2014 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #include "java_lang_ref_FinalizerReference.h"
18 
19 #include "nativehelper/jni_macros.h"
20 
21 #include "gc/heap.h"
22 #include "gc/reference_processor.h"
23 #include "jni/jni_internal.h"
24 #include "mirror/object-inl.h"
25 #include "mirror/reference-inl.h"
26 #include "native_util.h"
27 #include "scoped_fast_native_object_access-inl.h"
28 
29 namespace art {
30 
FinalizerReference_makeCircularListIfUnenqueued(JNIEnv * env,jobject javaThis)31 static jboolean FinalizerReference_makeCircularListIfUnenqueued(JNIEnv* env, jobject javaThis) {
32   ScopedFastNativeObjectAccess soa(env);
33   const ObjPtr<mirror::FinalizerReference> ref = soa.Decode<mirror::FinalizerReference>(javaThis);
34   return Runtime::Current()->GetHeap()->GetReferenceProcessor()->MakeCircularListIfUnenqueued(ref);
35 }
36 
FinalizerReference_getReferent(JNIEnv * env,jobject javaThis)37 static jobject FinalizerReference_getReferent(JNIEnv* env, jobject javaThis) {
38   ScopedFastNativeObjectAccess soa(env);
39   const ObjPtr<mirror::Reference> ref = soa.Decode<mirror::Reference>(javaThis);
40   const ObjPtr<mirror::Object> referent =
41       Runtime::Current()->GetHeap()->GetReferenceProcessor()->GetReferent(soa.Self(), ref);
42   return soa.AddLocalReference<jobject>(referent);
43 }
44 
45 static JNINativeMethod gMethods[] = {
46   FAST_NATIVE_METHOD(FinalizerReference, makeCircularListIfUnenqueued, "()Z"),
47   FAST_NATIVE_METHOD(FinalizerReference, getReferent, "()Ljava/lang/Object;"),
48 };
49 
register_java_lang_ref_FinalizerReference(JNIEnv * env)50 void register_java_lang_ref_FinalizerReference(JNIEnv* env) {
51   REGISTER_NATIVE_METHODS("java/lang/ref/FinalizerReference");
52 }
53 
54 }  // namespace art
55