srsRAN_4G/lib/include/srsran/adt/pool/pool_utils.h

/**
 *
 * \section COPYRIGHT
 *
 * Copyright 2013-2021 Software Radio Systems Limited
 *
 * By using this file, you agree to the terms and conditions set
 * forth in the LICENSE file which can be found at the top level of
 * the distribution.
 *
 */

#ifndef SRSRAN_POOL_UTILS_H
#define SRSRAN_POOL_UTILS_H

#include "../move_callback.h"
#include <memory>

namespace srsran {

namespace detail {

template <typename T>
struct inplace_default_ctor_operator {
  void operator()(void* ptr) { new (ptr) T(); }
};

struct noop_operator {
  template <typename T>
  void operator()(T&& t) const
  {
    // do nothing
  }
};

} // namespace detail

/// check if alignment is power of 2
constexpr bool is_valid_alignment(std::size_t alignment)
{
  return alignment && (alignment & (alignment - 1)) == 0u;
}

inline bool is_aligned(void* ptr, std::size_t alignment)
{
  return (reinterpret_cast<std::uintptr_t>(ptr) & (alignment - 1)) == 0;
}

constexpr std::uintptr_t align_next(std::uintptr_t pos, size_t alignment)
{
  return (pos + (alignment - 1)) & ~(alignment - 1);
}
inline void* align_to(void* pos, size_t alignment)
{
  return reinterpret_cast<void*>(align_next(reinterpret_cast<std::uintptr_t>(pos), alignment));
}
inline void* offset_byte_ptr(void* pos, size_t offset)
{
  return static_cast<void*>(static_cast<uint8_t*>(pos) + offset);
}

} // namespace srsran

#endif // SRSRAN_POOL_UTILS_H