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#pragma once

#include <boost/interprocess/sync/interprocess_condition.hpp>

#include <boost/interprocess/sync/interprocess_mutex.hpp>

#include "shm_manager.h"

namespace triton { namespace backend { namespace python {

namespace bi = boost::interprocess;

typedef enum PYTHONSTUB_commandtype_enum {

PYTHONSTUB_ExecuteRequest,

PYTHONSTUB_ExecuteResponse,

PYTHONSTUB_InitializeRequest,

PYTHONSTUB_InitializeResponse,

PYTHONSTUB_FinalizeRequest,

PYTHONSTUB_FinalizeResponse,

PYTHONSTUB_LoadGPUBuffers,

PYTHONSTUB_InferExecRequest,

PYTHONSTUB_InferStreamExecRequest,

PYTHONSTUB_InferExecResponse,

PYTHONSTUB_ResponseSend,

PYTHONSTUB_ResponseClose,

PYTHONSTUB_AutoCompleteRequest,

PYTHONSTUB_AutoCompleteResponse,

PYTHONSTUB_LogRequest,

PYTHONSTUB_CleanupRequest

} PYTHONSTUB_CommandType;

///

/// Shared memory representation of IPCMessage

///

/// \param command determines the IPC command that is going to be passed.

/// \param args determines the shared memory handle for the input parameters.

/// \param inline_response determines whether this is a response of another IPC

/// message. If this parameter is set, it must provide the handle of the

/// corresponding request in \param response_handle.

/// \param response_handle determines the request handle.

/// \param response_mutex stores the handle for the mutex for the response

/// object.

/// \param response_cond stores the handle for the condition variable

/// for the response object.

struct IPCMessageShm {

PYTHONSTUB_CommandType command;

bi::managed_external_buffer::handle_t args;

bool inline_response = false;

bi::managed_external_buffer::handle_t response_handle;

bi::managed_external_buffer::handle_t response_mutex;

bi::managed_external_buffer::handle_t response_cond;

};

class IPCMessage {

public:

static std::unique_ptr<IPCMessage> Create(

const std::unique_ptr<SharedMemoryManager>& shm_pool,

bool inline_response);

static std::unique_ptr<IPCMessage> LoadFromSharedMemory(

std::unique_ptr<SharedMemoryManager>& shm_pool,

bi::managed_external_buffer::handle_t message_handle);

PYTHONSTUB_CommandType& Command();

bool& InlineResponse();

bi::managed_external_buffer::handle_t& ResponseHandle();

bi::interprocess_condition* ResponseCondition();

bi::interprocess_mutex* ResponseMutex();

bi::managed_external_buffer::handle_t& Args();

bi::managed_external_buffer::handle_t ShmHandle();

private:

AllocatedSharedMemory<IPCMessageShm> ipc_message_shm_;

IPCMessageShm* ipc_message_shm_ptr_;

AllocatedSharedMemory<bi::interprocess_mutex> response_mutex_shm_;

bi::interprocess_mutex* response_mutex_shm_ptr_;

AllocatedSharedMemory<bi::interprocess_condition> response_cond_shm_;

bi::interprocess_condition* response_cond_shm_ptr_;

bi::managed_external_buffer::handle_t ipc_message_handle_;

/// Create/load a IPCMessage shm object.

/// \param ipc_message_shm IPCMessage representation in shared memory.

/// \param response_mutex_shm response mutex.

/// \param response_condition_shm response condition.

IPCMessage(

AllocatedSharedMemory<IPCMessageShm>& ipc_message_shm,

AllocatedSharedMemory<bi::interprocess_mutex>& response_mutex_shm,

AllocatedSharedMemory<bi::interprocess_condition>& response_cond_shm);

};

}}}; // namespace triton::backend::python