corundum 0.4.1

Persistent Programming Library
Documentation 
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// SPDX-License-Identifier: BSD-3-Clause
/* Copyright 2019-2020, Intel Corporation */

/*
 * simplekv.cpp -- implementation of simple kv which uses vector to hold
 * values, string as a key and array to hold buckets
 */

#include <libpmemobj++/make_persistent_atomic.hpp>
#include <libpmemobj++/pool.hpp>
#include <stdexcept>

#include "simplekv.hpp"

using kv_type = simple_kv<int, 10>;

struct root {
    pmem::obj::persistent_ptr<kv_type> kv;
};

void
show_usage(char *argv[])
{
    std::cerr << "usage: " << argv[0]
          << " file-name [get key|put key value]" << std::endl;
}

int
main(int argc, char *argv[])
{
    if (argc < 3) {
        show_usage(argv);
        return 1;
    }

    const char *path = argv[1];

    pmem::obj::pool<root> pop;

    try {
        pop = pmem::obj::pool<root>::open(path, "simplekv");
        auto r = pop.root();

        if (r->kv == nullptr) {
            pmem::obj::transaction::run(pop, [&] {
                r->kv = pmem::obj::make_persistent<kv_type>();
            });
        }

        if (std::string(argv[2]) == "get" && argc == 4)
            std::cout << r->kv->get(argv[3]) << std::endl;
        else if (std::string(argv[2]) == "put" && argc == 5)
            r->kv->put(argv[3], std::stoi(argv[4]));
        else if (std::string(argv[2]) == "burst" && std::string(argv[3]) == "get" && argc == 5) {
            int m = std::stoi(argv[4]);
            for(int i=0; i < m; i++) {
                char key[32] = {0};
                sprintf(key, "key%d", i);
                r->kv->get(key);
            }
        } else if (std::string(argv[2]) == "burst" && std::string(argv[3]) == "put" && argc == 5) {
            int m = std::stoi(argv[4]);
            for(int i=0; i < m; i++) {
                char key[32] = {0};
                sprintf(key, "key%d", i);
                r->kv->put(key, i);
            }
        } else {
            show_usage(argv);
            pop.close();
            return 1;
        }
    } catch (pmem::pool_error &e) {
        std::cerr << e.what() << std::endl;
        std::cerr
            << "To create pool run: pmempool create obj --layout=simplekv -s 100M path_to_pool"
            << std::endl;
    } catch (std::exception &e) {
        std::cerr << e.what() << std::endl;
    }

    try {
        pop.close();
    } catch (const std::logic_error &e) {
        std::cerr << e.what() << std::endl;
    }
    return 0;
}