ep_pool.hpp

#pragma once
 
#include <cstddef>
#include <cstdint>
 
#include "ep.hpp"
 
namespace LibXR::USB
{
 
class EndpointPool
{
 public:
  explicit EndpointPool(size_t endpoint_num);
 
  EndpointPool(const EndpointPool&) = delete;
  EndpointPool& operator=(const EndpointPool&) = delete;
 
  ErrorCode Put(Endpoint* ep);
 
  ErrorCode Get(Endpoint*& ep_info, Endpoint::Direction direction,
                Endpoint::EPNumber ep_num);
 
  ErrorCode Release(Endpoint* ep_info);
 
  ErrorCode FindEndpoint(uint8_t ep_addr, Endpoint*& ans);
 
  Endpoint* GetEndpoint0Out();
 
  Endpoint* GetEndpoint0In();
 
  void SetEndpoint0(Endpoint* ep0_in, Endpoint* ep0_out);
 
 private:
  static constexpr size_t DIR_COUNT = 2;
  static constexpr size_t SLOT_COUNT =
      static_cast<size_t>(Endpoint::EPNumber::EP_MAX_NUM);
 
  enum class SlotUse : uint8_t
  {
    AVAILABLE,  
    IN_USE      
  };
 
  static size_t DirIndex(Endpoint::Direction dir)
  {
    return (dir == Endpoint::Direction::IN) ? 1U : 0U;
  }
 
  Endpoint* slots_[SLOT_COUNT][DIR_COUNT] = {};  
  SlotUse use_[SLOT_COUNT][DIR_COUNT] = {};      
 
  Endpoint* ep0_in_ = nullptr;   
  Endpoint* ep0_out_ = nullptr;  
};
 
}  // namespace LibXR::USB