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#pragma once

#include <functional>

#include <queue>

#include "infer_response.h"

#include "pb_preferred_memory.h"

namespace triton { namespace backend { namespace python {

struct ResponseAllocatorUserp {

ResponseAllocatorUserp(

void* shm_pool, const PreferredMemory& preferred_memory)

: shm_pool(shm_pool), preferred_memory(preferred_memory)

{

}

void* shm_pool;

PreferredMemory preferred_memory;

};

class InferPayload : public std::enable_shared_from_this<InferPayload> {

public:

InferPayload(

const bool is_decouple,

std::function<void(std::unique_ptr<InferResponse>)> callback);

/// GetPtr should be only called when the InferPayload object is constructed

/// using a shared pointer. Calling this function in any other circumstance

/// is undefined behaviour until C++17.

std::shared_ptr<InferPayload> GetPtr() { return shared_from_this(); }

void SetValue(std::unique_ptr<InferResponse> infer_response);

void SetFuture(std::future<std::unique_ptr<InferResponse>>& response_future);

bool IsDecoupled();

bool IsPromiseSet();

void Callback(std::unique_ptr<InferResponse> infer_response);

void SetResponseAllocUserp(

const ResponseAllocatorUserp& response_alloc_userp);

std::shared_ptr<ResponseAllocatorUserp> ResponseAllocUserp();

private:

std::unique_ptr<std::promise<std::unique_ptr<InferResponse>>> promise_;

bool is_decoupled_;

std::mutex mutex_;

bool is_promise_set_;

std::function<void(std::unique_ptr<InferResponse>)> callback_;

std::shared_ptr<ResponseAllocatorUserp> response_alloc_userp_;

};

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