| /* |
| * Copyright © 2021 The Fuchsia Authors |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice (including the next |
| * paragraph) shall be included in all copies or substantial portions of the |
| * Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS |
| * IN THE SOFTWARE. |
| * |
| */ |
| |
| #ifndef SIMPLE_ALLOCATOR_H |
| #define SIMPLE_ALLOCATOR_H |
| |
| #include <list> |
| |
| #include "address_space_allocator.h" |
| |
| class SimpleAllocator final : public AddressSpaceAllocator { |
| public: |
| static std::unique_ptr<SimpleAllocator> Create(uint64_t base, size_t size); |
| |
| bool Alloc(size_t size, uint8_t align_pow2, uint64_t* addr_out) override; |
| bool Free(uint64_t addr) override; |
| bool GetSize(uint64_t addr, size_t* size_out) override; |
| |
| private: |
| SimpleAllocator(uint64_t base, size_t size); |
| |
| struct Region { |
| Region(uint64_t base, size_t size); |
| uint64_t base; |
| size_t size; |
| }; |
| |
| bool CheckGap(SimpleAllocator::Region* prev, SimpleAllocator::Region* next, uint64_t align, |
| size_t size, uint64_t* addr_out, bool* continue_search_out); |
| |
| private: |
| std::list<SimpleAllocator::Region>::iterator FindRegion(uint64_t addr); |
| |
| std::list<SimpleAllocator::Region> regions_; |
| }; |
| |
| #endif // SIMPLE_ALLOCATOR_H |