2 * Copyright (C) 2014 Apple Inc. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 #include "BumpAllocator.h"
30 #include "FixedVector.h"
31 #include "MediumAllocator.h"
33 #include "SmallLine.h"
40 // Per-cache object allocator.
44 Allocator(Deallocator&);
47 void* allocate(size_t);
48 bool allocateFastCase(size_t, void*&);
49 void* allocateSlowCase(size_t);
54 void* allocateFastCase(BumpAllocator&);
56 void* allocateMedium(size_t);
57 void* allocateLarge(size_t);
58 void* allocateXLarge(size_t);
60 Deallocator& m_deallocator;
62 std::array<BumpAllocator, smallMax / alignment> m_smallAllocators;
63 std::array<BumpAllocator, mediumMax / alignment> m_mediumAllocators;
66 inline bool Allocator::allocateFastCase(size_t size, void*& object)
71 BumpAllocator& allocator = m_smallAllocators[smallSizeClassFor(size)];
72 if (!allocator.canAllocate())
75 object = allocator.allocate();
79 inline void* Allocator::allocate(size_t size)
82 if (!allocateFastCase(size, object))
83 return allocateSlowCase(size);
87 } // namespace bmalloc