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/*
* Copyright (C) 2005-2009, 2015 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#ifndef WTF_FastMalloc_h
#define WTF_FastMalloc_h
#include <new>
#include <stdlib.h>
#include <wtf/StdLibExtras.h>
namespace WTF {
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;
};
// These functions call CRASH() if an allocation fails.
WTF_EXPORT_PRIVATE void* fastMalloc(size_t);
WTF_EXPORT_PRIVATE void* fastZeroedMalloc(size_t);
WTF_EXPORT_PRIVATE void* fastCalloc(size_t numElements, size_t elementSize);
WTF_EXPORT_PRIVATE void* fastRealloc(void*, size_t);
WTF_EXPORT_PRIVATE char* fastStrDup(const char*);
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);
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
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::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 */
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