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/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ART_RUNTIME_GC_ACCOUNTING_HEAP_BITMAP_H_
#define ART_RUNTIME_GC_ACCOUNTING_HEAP_BITMAP_H_
#include "base/allocator.h"
#include "base/logging.h"
#include "space_bitmap.h"
namespace art {
namespace gc {
class Heap;
namespace collector {
class ConcurrentCopying;
} // namespace collector
namespace accounting {
class HeapBitmap {
public:
bool Test(const mirror::Object* obj) REQUIRES_SHARED(Locks::heap_bitmap_lock_);
void Clear(const mirror::Object* obj) REQUIRES(Locks::heap_bitmap_lock_);
template<typename LargeObjectSetVisitor>
bool Set(const mirror::Object* obj, const LargeObjectSetVisitor& visitor)
REQUIRES_SHARED(Locks::mutator_lock_)
REQUIRES(Locks::heap_bitmap_lock_) ALWAYS_INLINE;
template<typename LargeObjectSetVisitor>
bool AtomicTestAndSet(const mirror::Object* obj, const LargeObjectSetVisitor& visitor)
REQUIRES_SHARED(Locks::mutator_lock_)
REQUIRES(Locks::heap_bitmap_lock_) ALWAYS_INLINE;
ContinuousSpaceBitmap* GetContinuousSpaceBitmap(const mirror::Object* obj) const;
LargeObjectBitmap* GetLargeObjectBitmap(const mirror::Object* obj) const;
template <typename Visitor>
ALWAYS_INLINE void Visit(Visitor&& visitor)
REQUIRES(Locks::heap_bitmap_lock_)
REQUIRES_SHARED(Locks::mutator_lock_);
// Find and replace a bitmap pointer, this is used by for the bitmap swapping in the GC.
void ReplaceBitmap(ContinuousSpaceBitmap* old_bitmap, ContinuousSpaceBitmap* new_bitmap)
REQUIRES(Locks::heap_bitmap_lock_);
// Find and replace a object set pointer, this is used by for the bitmap swapping in the GC.
void ReplaceLargeObjectBitmap(LargeObjectBitmap* old_bitmap, LargeObjectBitmap* new_bitmap)
REQUIRES(Locks::heap_bitmap_lock_);
explicit HeapBitmap(Heap* heap) : heap_(heap) {}
private:
const Heap* const heap_;
void AddContinuousSpaceBitmap(ContinuousSpaceBitmap* bitmap);
void RemoveContinuousSpaceBitmap(ContinuousSpaceBitmap* bitmap);
void AddLargeObjectBitmap(LargeObjectBitmap* bitmap);
void RemoveLargeObjectBitmap(LargeObjectBitmap* bitmap);
// Bitmaps covering continuous spaces.
std::vector<ContinuousSpaceBitmap*,
TrackingAllocator<ContinuousSpaceBitmap*, kAllocatorTagHeapBitmap>>
continuous_space_bitmaps_;
// Sets covering discontinuous spaces.
std::vector<LargeObjectBitmap*,
TrackingAllocator<LargeObjectBitmap*, kAllocatorTagHeapBitmapLOS>>
large_object_bitmaps_;
friend class art::gc::Heap;
friend class art::gc::collector::ConcurrentCopying;
};
} // namespace accounting
} // namespace gc
} // namespace art
#endif // ART_RUNTIME_GC_ACCOUNTING_HEAP_BITMAP_H_