| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 WTF_FastMalloc_h |
| #define WTF_FastMalloc_h |
| |
| #include <new> |
| #include <stdlib.h> |
| #include <wtf/StdLibExtras.h> |
| |
| namespace WTF { |
| |
| #if !defined(NDEBUG) |
| WTF_EXPORT_PRIVATE void fastSetMaxSingleAllocationSize(size_t); |
| #endif |
| |
| class TryMallocReturnValue { |
| public: |
| TryMallocReturnValue(void*); |
| TryMallocReturnValue(TryMallocReturnValue&&); |
| ~TryMallocReturnValue(); |
| template<typename T> bool getValue(T*&) WARN_UNUSED_RETURN; |
| private: |
| void operator=(TryMallocReturnValue&&) = delete; |
| mutable void* m_data; |
| }; |
| |
| WTF_EXPORT_PRIVATE bool isFastMallocEnabled(); |
| |
| // These functions call CRASH() if an allocation fails. |
| WTF_EXPORT_PRIVATE void* fastMalloc(size_t) RETURNS_NONNULL; |
| WTF_EXPORT_PRIVATE void* fastZeroedMalloc(size_t) RETURNS_NONNULL; |
| WTF_EXPORT_PRIVATE void* fastCalloc(size_t numElements, size_t elementSize) RETURNS_NONNULL; |
| WTF_EXPORT_PRIVATE void* fastRealloc(void*, size_t) RETURNS_NONNULL; |
| WTF_EXPORT_PRIVATE char* fastStrDup(const char*) RETURNS_NONNULL; |
| |
| WTF_EXPORT_PRIVATE TryMallocReturnValue tryFastMalloc(size_t); |
| TryMallocReturnValue tryFastZeroedMalloc(size_t); |
| WTF_EXPORT_PRIVATE TryMallocReturnValue tryFastCalloc(size_t numElements, size_t elementSize); |
| |
| WTF_EXPORT_PRIVATE void fastFree(void*); |
| |
| // Allocations from fastAlignedMalloc() must be freed using fastAlignedFree(). |
| WTF_EXPORT_PRIVATE void* fastAlignedMalloc(size_t alignment, size_t) RETURNS_NONNULL; |
| WTF_EXPORT_PRIVATE void* tryFastAlignedMalloc(size_t alignment, size_t); |
| WTF_EXPORT_PRIVATE void fastAlignedFree(void*); |
| |
| WTF_EXPORT_PRIVATE size_t fastMallocSize(const void*); |
| |
| // FIXME: This is non-helpful; fastMallocGoodSize will be removed soon. |
| WTF_EXPORT_PRIVATE size_t fastMallocGoodSize(size_t); |
| |
| WTF_EXPORT_PRIVATE void releaseFastMallocFreeMemory(); |
| WTF_EXPORT_PRIVATE void releaseFastMallocFreeMemoryForThisThread(); |
| |
| struct FastMallocStatistics { |
| size_t reservedVMBytes; |
| size_t committedVMBytes; |
| size_t freeListBytes; |
| }; |
| WTF_EXPORT_PRIVATE FastMallocStatistics fastMallocStatistics(); |
| |
| // This defines a type which holds an unsigned integer and is the same |
| // size as the minimally aligned memory allocation. |
| typedef unsigned long long AllocAlignmentInteger; |
| |
| inline TryMallocReturnValue::TryMallocReturnValue(void* data) |
| : m_data(data) |
| { |
| } |
| |
| inline TryMallocReturnValue::TryMallocReturnValue(TryMallocReturnValue&& source) |
| : m_data(source.m_data) |
| { |
| source.m_data = nullptr; |
| } |
| |
| inline TryMallocReturnValue::~TryMallocReturnValue() |
| { |
| ASSERT(!m_data); |
| } |
| |
| template<typename T> inline bool TryMallocReturnValue::getValue(T*& data) |
| { |
| data = static_cast<T*>(m_data); |
| m_data = nullptr; |
| return data; |
| } |
| |
| } // namespace WTF |
| |
| #if !defined(NDEBUG) |
| using WTF::fastSetMaxSingleAllocationSize; |
| #endif |
| |
| using WTF::isFastMallocEnabled; |
| using WTF::fastCalloc; |
| using WTF::fastFree; |
| using WTF::fastMalloc; |
| using WTF::fastMallocGoodSize; |
| using WTF::fastMallocSize; |
| using WTF::fastRealloc; |
| using WTF::fastStrDup; |
| using WTF::fastZeroedMalloc; |
| using WTF::tryFastAlignedMalloc; |
| using WTF::tryFastCalloc; |
| using WTF::tryFastMalloc; |
| using WTF::tryFastZeroedMalloc; |
| using WTF::fastAlignedMalloc; |
| using WTF::fastAlignedFree; |
| |
| #if COMPILER(GCC_OR_CLANG) && OS(DARWIN) |
| #define WTF_PRIVATE_INLINE __private_extern__ inline __attribute__((always_inline)) |
| #elif COMPILER(GCC_OR_CLANG) |
| #define WTF_PRIVATE_INLINE inline __attribute__((always_inline)) |
| #elif COMPILER(MSVC) |
| #define WTF_PRIVATE_INLINE __forceinline |
| #else |
| #define WTF_PRIVATE_INLINE inline |
| #endif |
| |
| #define WTF_MAKE_FAST_ALLOCATED \ |
| public: \ |
| void* operator new(size_t, void* p) { return p; } \ |
| void* operator new[](size_t, void* p) { return p; } \ |
| \ |
| void* operator new(size_t size) \ |
| { \ |
| return ::WTF::fastMalloc(size); \ |
| } \ |
| \ |
| void operator delete(void* p) \ |
| { \ |
| ::WTF::fastFree(p); \ |
| } \ |
| \ |
| void* operator new[](size_t size) \ |
| { \ |
| return ::WTF::fastMalloc(size); \ |
| } \ |
| \ |
| void operator delete[](void* p) \ |
| { \ |
| ::WTF::fastFree(p); \ |
| } \ |
| void* operator new(size_t, NotNullTag, void* location) \ |
| { \ |
| ASSERT(location); \ |
| return location; \ |
| } \ |
| private: \ |
| typedef int __thisIsHereToForceASemicolonAfterThisMacro |
| |
| #endif /* WTF_FastMalloc_h */ |