path: root/storage/tokudb/ft-index/src/tests/blocking-first.cc

/* -*- mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*- */
// vim: ft=cpp:expandtab:ts=8:sw=4:softtabstop=4:
#ident "$Id$"
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  TokuDB, Tokutek Fractal Tree Indexing Library.
  Copyright (C) 2007-2013 Tokutek, Inc.

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  This program is distributed in the hope that it will be useful, but
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  The technology is licensed by the Massachusetts Institute of
  Technology, Rutgers State University of New Jersey, and the Research
  Foundation of State University of New York at Stony Brook under
  United States of America Serial No. 11/760379 and to the patents
  and/or patent applications resulting from it.

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  This software is covered by US Patent No. 8,185,551.
  This software is covered by US Patent No. 8,489,638.

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*/

#ident "Copyright (c) 2007-2013 Tokutek Inc.  All rights reserved."
#ident "The technology is licensed by the Massachusetts Institute of Technology, Rutgers State University of New Jersey, and the Research Foundation of State University of New York at Stony Brook under United States of America Serial No. 11/760379 and to the patents and/or patent applications resulting from it."
// verify that cursor first with a write lock suspends the conflicting threads.

#include "test.h"
#include "toku_pthread.h"

static void populate(DB_ENV *db_env, DB *db, uint64_t nrows) {
    int r;

    DB_TXN *txn = NULL;
    r = db_env->txn_begin(db_env, NULL, &txn, 0); assert(r == 0);

    for (uint64_t i = 0; i < nrows; i++) {

        uint64_t k = htonl(i);
        uint64_t v = i;
        DBT key = { .data = &k, .size = sizeof k };
        DBT val = { .data = &v, .size = sizeof v };
        r = db->put(db, txn, &key, &val, 0); assert(r == 0);
    }

    r = txn->commit(txn, 0); assert(r == 0);
}

struct my_callback_context {
    DBT key;
    DBT val;
};

#if TOKUDB
static int blocking_first_callback(DBT const *a UU(), DBT const *b UU(), void *e UU()) {
    DBT const *found_key = a;
    DBT const *found_val = b;
    struct my_callback_context *context = (struct my_callback_context *) e;
    copy_dbt(&context->key, found_key);
    copy_dbt(&context->val, found_val);
    return 0;
}
#endif

static void blocking_first(DB_ENV *db_env, DB *db, uint64_t nrows, long sleeptime) {
    int r;

    struct my_callback_context context;
    dbt_init_realloc(&context.key);
    dbt_init_realloc(&context.val);

    for (uint64_t i = 0; i < nrows; i++) {
        DB_TXN *txn = NULL;
        r = db_env->txn_begin(db_env, NULL, &txn, 0); assert(r == 0);

        DBC *cursor = NULL;
        r = db->cursor(db, txn, &cursor, 0); assert(r == 0); // get a write lock on -inf ... 0
#if TOKUDB
        r = cursor->c_getf_first(cursor, DB_RMW, blocking_first_callback, &context); assert(r == 0);
#else
        r = cursor->c_get(cursor, &context.key, &context.val, DB_FIRST + DB_RMW); assert(r == 0);
#endif
        usleep(sleeptime);

        r = cursor->c_close(cursor); assert(r == 0);

        r = txn->commit(txn, 0); assert(r == 0);
        if (verbose)
            printf("%lu %" PRIu64 "\n", (unsigned long) toku_pthread_self(), i);
    }

    toku_free(context.key.data);
    toku_free(context.val.data);
}

struct blocking_first_args {
    DB_ENV *db_env;
    DB *db;
    uint64_t nrows;
    long sleeptime;
};

static void *blocking_first_thread(void *arg) {
    struct blocking_first_args *a = (struct blocking_first_args *) arg;
    blocking_first(a->db_env, a->db, a->nrows, a->sleeptime);
    return arg;
}

static void run_test(DB_ENV *db_env, DB *db, int nthreads, uint64_t nrows, long sleeptime) {
    int r;
    toku_pthread_t tids[nthreads];
    struct blocking_first_args a = { db_env, db, nrows, sleeptime };
    for (int i = 0; i < nthreads-1; i++) {
        r = toku_pthread_create(&tids[i], NULL, blocking_first_thread, &a); assert(r == 0);
    }
    blocking_first(db_env, db, nrows, sleeptime);
    for (int i = 0; i < nthreads-1; i++) {
        void *ret;
        r = toku_pthread_join(tids[i], &ret); assert(r == 0);
    }
}

int test_main(int argc, char * const argv[]) {
    uint64_t cachesize = 0;
    uint32_t pagesize = 0;
    uint64_t nrows = 10;
    int nthreads = 2;
    long sleeptime = 100000;
    const char *db_env_dir = TOKU_TEST_FILENAME;
    const char *db_filename = "test.db";
    int db_env_open_flags = DB_CREATE | DB_PRIVATE | DB_INIT_MPOOL | DB_INIT_TXN | DB_INIT_LOCK | DB_INIT_LOG | DB_THREAD;

    // parse_args(argc, argv);
    for (int i = 1; i < argc; i++) {
        if (strcmp(argv[i], "-v") == 0 || strcmp(argv[i], "--verbose") == 0) {
            verbose++;
            continue;
        }
        if (strcmp(argv[i], "-q") == 0 || strcmp(argv[i], "--quiet") == 0) {
            if (verbose > 0)
                verbose--;
            continue;
        }
        if (strcmp(argv[i], "--nrows") == 0 && i+1 < argc) {
            nrows = atoll(argv[++i]);
            continue;
        }
        if (strcmp(argv[i], "--nthreads") == 0 && i+1 < argc) {
            nthreads = atoi(argv[++i]);
            continue;
        }
        if (strcmp(argv[i], "--sleeptime") == 0 && i+1 < argc) {
            sleeptime = atol(argv[++i]);
            continue;
        }
        assert(0);
    }

    // setup env
    int r;
    char rm_cmd[strlen(db_env_dir) + strlen("rm -rf ") + 1];
    snprintf(rm_cmd, sizeof(rm_cmd), "rm -rf %s", db_env_dir);
    r = system(rm_cmd); assert(r == 0);

    r = toku_os_mkdir(db_env_dir, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH); assert(r == 0);

    DB_ENV *db_env = NULL;
    r = db_env_create(&db_env, 0); assert(r == 0);
    if (cachesize) {
        const uint64_t gig = 1 << 30;
        r = db_env->set_cachesize(db_env, cachesize / gig, cachesize % gig, 1); assert(r == 0);
    }
    r = db_env->open(db_env, db_env_dir, db_env_open_flags, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH); assert(r == 0);
#if TOKUDB
    r = db_env->set_lock_timeout(db_env, 30 * 1000, nullptr); assert(r == 0);
#endif

    // create the db
    DB *db = NULL;
    r = db_create(&db, db_env, 0); assert(r == 0);
    if (pagesize) {
        r = db->set_pagesize(db, pagesize); assert(r == 0);
    }
    r = db->open(db, NULL, db_filename, NULL, DB_BTREE, DB_CREATE|DB_AUTO_COMMIT|DB_THREAD, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH); assert(r == 0);

    // populate the db
    populate(db_env, db, nrows);

    run_test(db_env, db, nthreads, nrows, sleeptime);

    // close env
    r = db->close(db, 0); assert(r == 0); db = NULL;
    r = db_env->close(db_env, 0); assert(r == 0); db_env = NULL;

    return 0;
}