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_Reference.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
Reference_getReferent(JNIEnv * env,jobject javaThis)31 static jobject Reference_getReferent(JNIEnv* env, jobject javaThis) {
32 ScopedFastNativeObjectAccess soa(env);
33 const ObjPtr<mirror::Reference> ref = soa.Decode<mirror::Reference>(javaThis);
34 const ObjPtr<mirror::Object> referent =
35 Runtime::Current()->GetHeap()->GetReferenceProcessor()->GetReferent(soa.Self(), ref);
36 return soa.AddLocalReference<jobject>(referent);
37 }
38
Reference_clearReferent(JNIEnv * env,jobject javaThis)39 static void Reference_clearReferent(JNIEnv* env, jobject javaThis) {
40 ScopedFastNativeObjectAccess soa(env);
41 const ObjPtr<mirror::Reference> ref = soa.Decode<mirror::Reference>(javaThis);
42 Runtime::Current()->GetHeap()->GetReferenceProcessor()->ClearReferent(ref);
43 }
44
45 static JNINativeMethod gMethods[] = {
46 FAST_NATIVE_METHOD(Reference, getReferent, "()Ljava/lang/Object;"),
47 FAST_NATIVE_METHOD(Reference, clearReferent, "()V"),
48 };
49
register_java_lang_ref_Reference(JNIEnv * env)50 void register_java_lang_ref_Reference(JNIEnv* env) {
51 REGISTER_NATIVE_METHODS("java/lang/ref/Reference");
52 }
53
54 } // namespace art
55