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63 lines
2.2 KiB
63 lines
2.2 KiB
/*
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* Copyright (C) 2018 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 ART_RUNTIME_WRITE_BARRIER_H_
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#define ART_RUNTIME_WRITE_BARRIER_H_
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#include "base/macros.h"
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namespace art {
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namespace gc {
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namespace accounting {
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class CardTable;
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} // namespace accounting
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} // namespace gc
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class WriteBarrier {
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public:
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enum NullCheck {
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kWithoutNullCheck,
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kWithNullCheck,
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};
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// Must be called if a reference field of an Object in the heap changes, and before any GC
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// safe-point. The call is not needed if null is stored in the field.
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template <NullCheck kNullCheck = kWithNullCheck>
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ALWAYS_INLINE static void ForFieldWrite(ObjPtr<mirror::Object> dst,
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MemberOffset offset ATTRIBUTE_UNUSED,
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ObjPtr<mirror::Object> new_value ATTRIBUTE_UNUSED)
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REQUIRES_SHARED(Locks::mutator_lock_);
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// Must be called if a reference field of an ObjectArray in the heap changes, and before any GC
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// safe-point. The call is not needed if null is stored in the field.
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ALWAYS_INLINE static void ForArrayWrite(ObjPtr<mirror::Object> dst,
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int start_offset ATTRIBUTE_UNUSED,
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size_t length ATTRIBUTE_UNUSED)
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REQUIRES_SHARED(Locks::mutator_lock_);
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// Write barrier for every reference field in an object.
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ALWAYS_INLINE static void ForEveryFieldWrite(ObjPtr<mirror::Object> obj)
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REQUIRES_SHARED(Locks::mutator_lock_);
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private:
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ALWAYS_INLINE static gc::accounting::CardTable* GetCardTable();
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};
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} // namespace art
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#endif // ART_RUNTIME_WRITE_BARRIER_H_
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