stack.hpp

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#pragma once
 
#include <yaclib/fault/detail/fiber/stack_allocator.hpp>
 
#include <cstddef>
 
namespace yaclib::detail::fiber {
 
/**
 * Manages stack memory
 */
class Stack final {
 public:
  explicit Stack(IStackAllocator& allocator) : _allocation{allocator.Allocate()}, _allocator{&allocator} {
  }
 
  Stack(Stack&& that) noexcept = default;
 
  Stack& operator=(Stack&& other) noexcept {
    auto& new_allocation = other.GetAllocation();
    _allocator->Release(_allocation);
    _allocation = other.GetAllocation();
    _allocator = &other.GetAllocator();
    new_allocation.size = 0;
    new_allocation.start = nullptr;
    return *this;
  }
 
  [[nodiscard]] Allocation& GetAllocation() noexcept {
    return _allocation;
  }
 
  [[nodiscard]] IStackAllocator& GetAllocator() const noexcept {
    return *_allocator;
  }
 
  ~Stack() {
    _allocator->Release(_allocation);
  }
 
 private:
  Allocation _allocation;
  IStackAllocator* _allocator;
};
 
}  // namespace yaclib::detail::fiber