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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_SRC_HEAP_BITMAP_H_
#define ART_SRC_HEAP_BITMAP_H_
#include "space_bitmap.h"
namespace art {
class Heap;
class SpaceBitmap;
class HeapBitmap {
public:
bool Test(const Object* obj)
SHARED_LOCKS_REQUIRED(Locks::heap_bitmap_lock_) {
SpaceBitmap* bitmap = GetSpaceBitmap(obj);
if (LIKELY(bitmap != NULL)) {
return bitmap->Test(obj);
} else {
return large_objects_->Test(obj);
}
}
void Clear(const Object* obj)
EXCLUSIVE_LOCKS_REQUIRED(Locks::heap_bitmap_lock_) {
SpaceBitmap* bitmap = GetSpaceBitmap(obj);
if (LIKELY(bitmap != NULL)) {
return bitmap->Clear(obj);
} else {
return large_objects_->Clear(obj);
}
}
void Set(const Object* obj)
EXCLUSIVE_LOCKS_REQUIRED(Locks::heap_bitmap_lock_) {
SpaceBitmap* bitmap = GetSpaceBitmap(obj);
if (LIKELY(bitmap != NULL)) {
bitmap->Set(obj);
} else {
large_objects_->Set(obj);
}
}
SpaceBitmap* GetSpaceBitmap(const Object* obj) {
// TODO: C++0x auto
for (Bitmaps::iterator it = bitmaps_.begin(); it != bitmaps_.end(); ++it) {
if ((*it)->HasAddress(obj)) {
return *it;
}
}
return NULL;
}
void Walk(SpaceBitmap::Callback* callback, void* arg)
SHARED_LOCKS_REQUIRED(Locks::heap_bitmap_lock_);
template <typename Visitor>
void Visit(const Visitor& visitor)
EXCLUSIVE_LOCKS_REQUIRED(Locks::heap_bitmap_lock_) {
// TODO: C++0x auto
for (Bitmaps::iterator it = bitmaps_.begin(); it != bitmaps_.end(); ++it) {
SpaceBitmap* bitmap = *it;
bitmap->VisitMarkedRange(bitmap->HeapBegin(), bitmap->HeapLimit(), visitor,
IdentityFunctor());
}
large_objects_->Visit(visitor);
}
// Find and replace a bitmap pointer, this is used by for the bitmap swapping in the GC.
void ReplaceBitmap(SpaceBitmap* old_bitmap, SpaceBitmap* new_bitmap)
EXCLUSIVE_LOCKS_REQUIRED(Locks::heap_bitmap_lock_);
HeapBitmap(Heap* heap);
inline SpaceSetMap* GetLargeObjects() const {
return large_objects_;
}
void SetLargeObjects(SpaceSetMap* large_objects);
private:
const Heap* const heap_;
void AddSpaceBitmap(SpaceBitmap* bitmap);
typedef std::vector<SpaceBitmap*> Bitmaps;
Bitmaps bitmaps_;
// Large object sets.
SpaceSetMap* large_objects_;
friend class Heap;
};
} // namespace art
#endif // ART_SRC_HEAP_BITMAP_H_
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