// Copyright 2022, NVIDIA CORPORATION & AFFILIATES. All rights reserved.

//

// Redistribution and use in source and binary forms, with or without

// modification, are permitted provided that the following conditions

// are met:

// * Redistributions of source code must retain the above copyright

// notice, this list of conditions and the following disclaimer.

// * Redistributions in binary form must reproduce the above copyright

// notice, this list of conditions and the following disclaimer in the

// documentation and/or other materials provided with the distribution.

// * Neither the name of NVIDIA CORPORATION nor the names of its

// contributors may be used to endorse or promote products derived

// from this software without specific prior written permission.

//

// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY

// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR

// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY

// OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#pragma once

#include <unordered_map>

#include "pb_string.h"

#include "shm_manager.h"

namespace triton { namespace backend { namespace python {

struct PairShm {

bi::managed_external_buffer::handle_t key;

bi::managed_external_buffer::handle_t value;

};

struct DictShm {

uint32_t length;

// `values` point to the location where there are `length` of Pair objects.

bi::managed_external_buffer::handle_t values;

};

class PbMap {

public:

static std::unique_ptr<PbMap> Create(

std::unique_ptr<SharedMemoryManager>& shm_pool,

std::unordered_map<std::string, std::string>& map);

static std::unique_ptr<PbMap> LoadFromSharedMemory(

std::unique_ptr<SharedMemoryManager>& shm_pool,

bi::managed_external_buffer::handle_t handle);

const std::unordered_map<std::string, std::string>& UnorderedMap();

bi::managed_external_buffer::handle_t ShmHandle();

private:

PbMap(

std::vector<std::unique_ptr<PbString>>& strings,

AllocatedSharedMemory<DictShm>& dict_shm,

AllocatedSharedMemory<PairShm>& pair_shms,

std::unordered_map<std::string, std::string>& map);

std::vector<std::unique_ptr<PbString>> strings_;

AllocatedSharedMemory<DictShm> dict_shm_;

AllocatedSharedMemory<PairShm> pair_shms_;

bi::managed_external_buffer::handle_t dict_handle_;

std::unordered_map<std::string, std::string> map_;

};

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