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/small_block_base.h" 20 21 namespace pw::allocator { 22 23 /// A block implementation with only 4 bytes of overhead. 24 /// 25 /// Like its base class, this block is allocatable with a fixed alignment. This 26 /// class's code size is slightly larger than that of `SmallBlock`, and it can 27 /// address only 2^18 - 4 bytes of memory. 28 class TinyBlock : public SmallBlockBase<TinyBlock, uint16_t, 2> { 29 private: 30 friend SmallBlockBase<TinyBlock, uint16_t, 2>; TinyBlock(size_t outer_size)31 constexpr explicit TinyBlock(size_t outer_size) 32 : SmallBlockBase(outer_size) {} 33 }; 34 35 } // namespace pw::allocator 36