86722be9ca
- Add align parameter - Templated Alloc() implicitly aligns type correctly - Rewind may leak padding that was added due to alignment
67 lines
1.6 KiB
C++
67 lines
1.6 KiB
C++
/**
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******************************************************************************
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* Xenia : Xbox 360 Emulator Research Project *
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******************************************************************************
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* Copyright 2021 Ben Vanik. All rights reserved. *
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* Released under the BSD license - see LICENSE in the root for more details. *
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******************************************************************************
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*/
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#ifndef XENIA_BASE_ARENA_H_
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#define XENIA_BASE_ARENA_H_
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#include <cstddef>
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#include <cstdint>
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#include <vector>
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namespace xe {
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class Arena {
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public:
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explicit Arena(size_t chunk_size = 4 * 1024 * 1024);
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~Arena();
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void Reset();
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void DebugFill();
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void* Alloc(size_t size, size_t align);
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template <typename T>
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T* Alloc() {
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return reinterpret_cast<T*>(Alloc(sizeof(T), alignof(T)));
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}
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// When rewinding aligned allocations, any padding that was applied during
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// allocation will be leaked
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void Rewind(size_t size);
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void* CloneContents();
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template <typename T>
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void CloneContents(std::vector<T>* buffer) {
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buffer->resize(CalculateSize() / sizeof(T));
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CloneContents(buffer->data(), buffer->size() * sizeof(T));
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}
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private:
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class Chunk {
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public:
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explicit Chunk(size_t chunk_size);
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~Chunk();
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Chunk* next;
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size_t capacity;
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uint8_t* buffer;
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size_t offset;
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};
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size_t CalculateSize();
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void CloneContents(void* buffer, size_t buffer_length);
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size_t chunk_size_;
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Chunk* head_chunk_;
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Chunk* active_chunk_;
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};
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} // namespace xe
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#endif // XENIA_BASE_ARENA_H_
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