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/*
* Copyright (C) 2014-2017 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 Cache_h
#define Cache_h
#include "Allocator.h"
#include "BExport.h"
#include "Deallocator.h"
#include "HeapKind.h"
#include "PerThread.h"
namespace bmalloc {
// Per-thread allocation / deallocation cache, backed by a per-process Heap.
class Cache {
public:
static void* tryAllocate(HeapKind, size_t);
static void* allocate(HeapKind, size_t);
static void* tryAllocate(HeapKind, size_t alignment, size_t);
static void* allocate(HeapKind, size_t alignment, size_t);
static void deallocate(HeapKind, void*);
static void* reallocate(HeapKind, void*, size_t);
static void scavenge(HeapKind);
Cache(HeapKind);
Allocator& allocator() { return m_allocator; }
Deallocator& deallocator() { return m_deallocator; }
private:
BEXPORT static void* tryAllocateSlowCaseNullCache(HeapKind, size_t);
BEXPORT static void* allocateSlowCaseNullCache(HeapKind, size_t);
BEXPORT static void* allocateSlowCaseNullCache(HeapKind, size_t alignment, size_t);
BEXPORT static void deallocateSlowCaseNullCache(HeapKind, void*);
BEXPORT static void* reallocateSlowCaseNullCache(HeapKind, void*, size_t);
Deallocator m_deallocator;
Allocator m_allocator;
};
inline void* Cache::tryAllocate(HeapKind heapKind, size_t size)
{
PerHeapKind<Cache>* caches = PerThread<PerHeapKind<Cache>>::getFastCase();
if (!caches)
return tryAllocateSlowCaseNullCache(heapKind, size);
return caches->at(heapKind).allocator().tryAllocate(size);
}
inline void* Cache::allocate(HeapKind heapKind, size_t size)
{
PerHeapKind<Cache>* caches = PerThread<PerHeapKind<Cache>>::getFastCase();
if (!caches)
return allocateSlowCaseNullCache(heapKind, size);
return caches->at(heapKind).allocator().allocate(size);
}
inline void* Cache::tryAllocate(HeapKind heapKind, size_t alignment, size_t size)
{
PerHeapKind<Cache>* caches = PerThread<PerHeapKind<Cache>>::getFastCase();
if (!caches)
return allocateSlowCaseNullCache(heapKind, alignment, size);
return caches->at(heapKind).allocator().tryAllocate(alignment, size);
}
inline void* Cache::allocate(HeapKind heapKind, size_t alignment, size_t size)
{
PerHeapKind<Cache>* caches = PerThread<PerHeapKind<Cache>>::getFastCase();
if (!caches)
return allocateSlowCaseNullCache(heapKind, alignment, size);
return caches->at(heapKind).allocator().allocate(alignment, size);
}
inline void Cache::deallocate(HeapKind heapKind, void* object)
{
PerHeapKind<Cache>* caches = PerThread<PerHeapKind<Cache>>::getFastCase();
if (!caches)
return deallocateSlowCaseNullCache(heapKind, object);
return caches->at(heapKind).deallocator().deallocate(object);
}
inline void* Cache::reallocate(HeapKind heapKind, void* object, size_t newSize)
{
PerHeapKind<Cache>* caches = PerThread<PerHeapKind<Cache>>::getFastCase();
if (!caches)
return reallocateSlowCaseNullCache(heapKind, object, newSize);
return caches->at(heapKind).allocator().reallocate(object, newSize);
}
} // namespace bmalloc
#endif // Cache_h