| /* |
| * Copyright (C) 2014-2018 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef Deallocator_h |
| #define Deallocator_h |
| |
| #include "BExport.h" |
| #include "FixedVector.h" |
| #include "SmallPage.h" |
| #include <mutex> |
| |
| namespace bmalloc { |
| |
| class Heap; |
| class Mutex; |
| |
| // Per-cache object deallocator. |
| |
| class Deallocator { |
| public: |
| Deallocator(Heap&); |
| ~Deallocator(); |
| |
| void deallocate(void*); |
| void scavenge(); |
| |
| void processObjectLog(std::unique_lock<Mutex>&); |
| |
| LineCache& lineCache(std::unique_lock<Mutex>&) { return m_lineCache; } |
| |
| private: |
| bool deallocateFastCase(void*); |
| BEXPORT void deallocateSlowCase(void*); |
| |
| Heap& m_heap; |
| FixedVector<void*, deallocatorLogCapacity> m_objectLog; |
| LineCache m_lineCache; // The Heap removes items from this cache. |
| }; |
| |
| inline bool Deallocator::deallocateFastCase(void* object) |
| { |
| BASSERT(mightBeLarge(nullptr)); |
| if (mightBeLarge(object)) |
| return false; |
| |
| if (m_objectLog.size() == m_objectLog.capacity()) |
| return false; |
| |
| m_objectLog.push(object); |
| return true; |
| } |
| |
| inline void Deallocator::deallocate(void* object) |
| { |
| if (!deallocateFastCase(object)) |
| deallocateSlowCase(object); |
| } |
| |
| } // namespace bmalloc |
| |
| #endif // Deallocator_h |