mimir/include/heap.h

//
//  heap.h
//  Kraken Engine / Mimir
//
//  Copyright 2026 Kearwood Gilbert. All rights reserved.
//
//  Redistribution and use in source and binary forms, with or without modification, are
//  permitted provided that the following conditions are met:
//
//  1. Redistributions of source code must retain the above copyright notice, this list of
//  conditions and the following disclaimer.
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//  2. Redistributions in binary form must reproduce the above copyright notice, this list
//  of conditions and the following disclaimer in the documentation and/or other materials
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//
//  THIS SOFTWARE IS PROVIDED BY KEARWOOD GILBERT ''AS IS'' AND ANY EXPRESS OR IMPLIED
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//

#pragma once

#include <cstddef>

#include "region.h"

namespace mimir {

// Heap implementation based on Two-Level Segregated Fit (TLSF) memory allocation
class Heap
{
public:
  Heap();
  ~Heap();

  bool init(size_t maxSize = 1ULL << 32);

  // Allocate `size` bytes
  std::byte* alloc(size_t size);

  // Allocate `size` bytes, aligned to 16 bytes and padded to next 16-byte offset.
  std::byte* allocA16(size_t size);

  // Allocate `size` bytes, aligned to 64 bytes and padded to next 64-byte offset.
  std::byte* allocA64(size_t size);

  // Free the allocation at `address`
  void free(std::byte* address);

private:
  Region m_region;
};

} // namespace mimir