| /* |
| * Copyright (C) 2017-2018 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. |
| */ |
| |
| #pragma once |
| |
| #include "PerThread.h" |
| #include <cstddef> |
| |
| namespace bmalloc { |
| |
| class IsoTLSEntry; |
| template<typename Config> class IsoAllocator; |
| template<typename Config> class IsoDeallocator; |
| |
| namespace api { |
| template<typename Type> struct IsoHeap; |
| } |
| |
| class IsoTLS { |
| public: |
| template<typename Type> |
| static void* allocate(api::IsoHeap<Type>&, bool abortOnFailure); |
| |
| template<typename Type> |
| static void deallocate(api::IsoHeap<Type>&, void* p); |
| |
| template<typename Type> |
| static void ensureHeap(api::IsoHeap<Type>&); |
| |
| static void scavenge(); |
| |
| template<typename Type> |
| static void scavenge(api::IsoHeap<Type>&); |
| |
| private: |
| IsoTLS(); |
| |
| template<typename Config, typename Type> |
| static void* allocateImpl(api::IsoHeap<Type>&, bool abortOnFailure); |
| |
| template<typename Config> |
| void* allocateFast(unsigned offset, bool abortOnFailure); |
| |
| template<typename Config, typename Type> |
| static void* allocateSlow(api::IsoHeap<Type>&, bool abortOnFailure); |
| |
| template<typename Config, typename Type> |
| static void deallocateImpl(api::IsoHeap<Type>&, void* p); |
| |
| template<typename Config, typename Type> |
| void deallocateFast(api::IsoHeap<Type>&, unsigned offset, void* p); |
| |
| template<typename Config, typename Type> |
| static void deallocateSlow(api::IsoHeap<Type>&, void* p); |
| |
| static IsoTLS* get(); |
| static void set(IsoTLS*); |
| |
| template<typename Type> |
| static IsoTLS* ensureHeapAndEntries(api::IsoHeap<Type>&); |
| |
| BEXPORT static IsoTLS* ensureEntries(unsigned offset); |
| |
| static void destructor(void* arg); // FIXME implement this |
| |
| static size_t sizeForCapacity(unsigned capacity); |
| static unsigned capacityForSize(size_t size); |
| |
| size_t size(); |
| |
| template<typename Func> |
| void forEachEntry(const Func&); |
| |
| enum class MallocFallbackState : uint8_t { |
| Undecided, |
| FallBackToMalloc, |
| DoNotFallBack |
| }; |
| |
| BEXPORT static MallocFallbackState s_mallocFallbackState; |
| |
| BEXPORT static void determineMallocFallbackState(); |
| |
| IsoTLSEntry* m_lastEntry { nullptr }; |
| unsigned m_extent { 0 }; |
| unsigned m_capacity { 0 }; |
| char m_data[1]; |
| |
| #if HAVE_PTHREAD_MACHDEP_H |
| static constexpr pthread_key_t tlsKey = __PTK_FRAMEWORK_JAVASCRIPTCORE_KEY1; |
| #else |
| BEXPORT static bool s_didInitialize; |
| BEXPORT static pthread_key_t s_tlsKey; |
| #endif |
| }; |
| |
| } // namespace bmalloc |
| |