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62 lines
1.6 KiB
62 lines
1.6 KiB
/* |
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* Copyright (C) 2010 The Android Open Source Project |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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#ifndef SCOPED_LOCAL_REF_H_included |
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#define SCOPED_LOCAL_REF_H_included |
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#include "jni.h" |
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#include <stddef.h> |
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#include "JNIHelp.h" // for DISALLOW_COPY_AND_ASSIGN. |
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// A smart pointer that deletes a JNI local reference when it goes out of scope. |
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template<typename T> |
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class ScopedLocalRef { |
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public: |
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ScopedLocalRef(JNIEnv* env, T localRef) : mEnv(env), mLocalRef(localRef) { |
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} |
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~ScopedLocalRef() { |
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reset(); |
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} |
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void reset(T ptr = NULL) { |
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if (ptr != mLocalRef) { |
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if (mLocalRef != NULL) { |
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mEnv->DeleteLocalRef(mLocalRef); |
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} |
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mLocalRef = ptr; |
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} |
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} |
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T release() __attribute__((warn_unused_result)) { |
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T localRef = mLocalRef; |
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mLocalRef = NULL; |
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return localRef; |
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} |
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T get() const { |
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return mLocalRef; |
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} |
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private: |
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JNIEnv* const mEnv; |
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T mLocalRef; |
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DISALLOW_COPY_AND_ASSIGN(ScopedLocalRef); |
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}; |
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#endif // SCOPED_LOCAL_REF_H_included
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