1 // Copyright 2025 The Pigweed Authors 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); you may not 4 // use this file except in compliance with the License. You may obtain a copy of 5 // the License at 6 // 7 // https://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 11 // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 12 // License for the specific language governing permissions and limitations under 13 // the License. 14 #pragma once 15 16 #include <cstddef> 17 #include <cstdint> 18 19 #include "pw_allocator/block/alignable.h" 20 #include "pw_allocator/block/small_block_base.h" 21 22 namespace pw::allocator { 23 24 /// An alignable version of `SmallBlock`. 25 class SmallAlignableBlock 26 : public SmallBlockBase<SmallAlignableBlock, uint32_t, 0>, 27 public AlignableBlock<SmallAlignableBlock> { 28 private: 29 friend SmallBlockBase<SmallAlignableBlock, uint32_t, 0>; SmallAlignableBlock(size_t outer_size)30 constexpr explicit SmallAlignableBlock(size_t outer_size) 31 : SmallBlockBase(outer_size) {} 32 33 using Allocatable = AllocatableBlock<SmallAlignableBlock>; 34 friend Allocatable; 35 36 // `Alignable` overrides. 37 using Alignable = AlignableBlock<SmallAlignableBlock>; 38 friend Alignable; 39 DoCanAlloc(Layout layout)40 constexpr StatusWithSize DoCanAlloc(Layout layout) const { 41 return Alignable::DoCanAlloc(layout); 42 } 43 DoAllocFirst(SmallAlignableBlock * && block,Layout layout)44 static constexpr BlockResult<SmallAlignableBlock> DoAllocFirst( 45 SmallAlignableBlock*&& block, Layout layout) { 46 return Alignable::DoAllocFirst(std::move(block), layout); 47 } 48 DoAllocLast(SmallAlignableBlock * && block,Layout layout)49 static constexpr BlockResult<SmallAlignableBlock> DoAllocLast( 50 SmallAlignableBlock*&& block, Layout layout) { 51 return Alignable::DoAllocLast(std::move(block), layout); 52 } 53 }; 54 55 } // namespace pw::allocator 56