inline_core.hpp

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#pragma once
 
#include <yaclib/config.hpp>
#include <yaclib/exe/job.hpp>
#include <yaclib/log.hpp>
 
#if YACLIB_SYMMETRIC_TRANSFER != 0
#  include <yaclib/coro/coro.hpp>
#endif
 
namespace yaclib::detail {
 
class InlineCore : public Job {
 public:
  [[nodiscard]] virtual InlineCore* Here(InlineCore& caller) noexcept = 0;
 
#if YACLIB_SYMMETRIC_TRANSFER != 0
  [[nodiscard]] virtual yaclib_std::coroutine_handle<> Next(InlineCore& caller) noexcept = 0;
#endif
};
 
template <bool SymmetricTransfer>
YACLIB_INLINE auto Step([[maybe_unused]] InlineCore& caller, InlineCore& callback) noexcept {
#if YACLIB_SYMMETRIC_TRANSFER != 0
  if constexpr (SymmetricTransfer) {
    return callback.Next(caller);
  } else
#endif
  {
    return &callback;
  }
}
 
template <bool SymmetricTransfer>
YACLIB_INLINE auto Noop() noexcept {
#if YACLIB_SYMMETRIC_TRANSFER != 0
  if constexpr (SymmetricTransfer) {
    return yaclib_std::coroutine_handle<>{yaclib_std::noop_coroutine()};
  } else
#endif
  {
    return static_cast<InlineCore*>(nullptr);
  }
}
 
YACLIB_INLINE void Loop(InlineCore* prev, InlineCore* curr) noexcept {
  while (curr != nullptr) {
    auto* next = curr->Here(*prev);
    prev = curr;
    curr = next;
  }
}
 
template <bool SymmetricTransfer>
#if YACLIB_SYMMETRIC_TRANSFER != 0
using Transfer = std::conditional_t<SymmetricTransfer, yaclib_std::coroutine_handle<>, InlineCore*>;
#else
using Transfer = InlineCore*;
#endif
 
}  // namespace yaclib::detail