/* -*- mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*- */
// vim: ft=cpp:expandtab:ts=8:sw=4:softtabstop=4:
#ident "$Id$"
#ident "Copyright (c) 2007-2012 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."
// stress test for update broadcast.  10M 8-byte keys should be 2, maybe 3
// levels of treeness, makes sure flushes work

#include "test.h"

const int envflags = DB_INIT_MPOOL|DB_CREATE|DB_THREAD |DB_INIT_LOCK|DB_INIT_LOG|DB_INIT_TXN|DB_PRIVATE;

DB_ENV *env;

const unsigned int NUM_KEYS = 10000000;
const unsigned int MAGIC_EXTRA = 0x4ac0ffee;

static inline unsigned int _v(const unsigned int i) { return 10 - i; }
static inline unsigned int _e(const unsigned int i) { return i + 4; }
static inline unsigned int _u(const unsigned int v, const unsigned int e) { return v + 2 * e; }

static int update_fun(DB *UU(db),
                      const DBT *key,
                      const DBT *old_val, const DBT *extra,
                      void (*set_val)(const DBT *new_val,
                                      void *set_extra),
                      void *set_extra) {
    unsigned int *k, *ov, *e, v;
    assert(key->size == sizeof(*k));
    CAST_FROM_VOIDP(k, key->data);
    assert(old_val->size == sizeof(*ov));
    CAST_FROM_VOIDP(ov, old_val->data);
    assert(extra->size == sizeof(*e));
    CAST_FROM_VOIDP(e, extra->data);
    assert(*e == MAGIC_EXTRA);
    v = _u(*ov, _e(*k));

    {
        DBT newval;
        set_val(dbt_init(&newval, &v, sizeof(v)), set_extra);
    }

    return 0;
}

static int
int_cmp(DB *UU(db), const DBT *a, const DBT *b) {
    unsigned int *ap, *bp;
    assert(a->size == sizeof(*ap));
    CAST_FROM_VOIDP(ap, a->data);
    assert(b->size == sizeof(*bp));
    CAST_FROM_VOIDP(bp, b->data);
    return (*ap > *bp) - (*ap < *bp);
}

static void setup (void) {
    { int chk_r = system("rm -rf " ENVDIR); CKERR(chk_r); }
    { int chk_r = toku_os_mkdir(ENVDIR, S_IRWXU+S_IRWXG+S_IRWXO); CKERR(chk_r); }
    { int chk_r = db_env_create(&env, 0); CKERR(chk_r); }
    env->set_errfile(env, stderr);
    env->set_update(env, update_fun);
    { int chk_r = env->set_default_bt_compare(env, int_cmp); CKERR(chk_r); }
    { int chk_r = env->open(env, ENVDIR, envflags, S_IRWXU+S_IRWXG+S_IRWXO); CKERR(chk_r); }
}

static void cleanup (void) {
    { int chk_r = env->close(env, 0); CKERR(chk_r); }
}

static int do_inserts(DB_TXN *txn, DB *db) {
    int r = 0;
    DBT key, val;
    unsigned int i, v;
    DBT *keyp = dbt_init(&key, &i, sizeof(i));
    DBT *valp = dbt_init(&val, &v, sizeof(v));
    for (i = 0; i < NUM_KEYS; ++i) {
        v = _v(i);
        r = db->put(db, txn, keyp, valp, 0); CKERR(r);
    }
    return r;
}

static int do_updates(DB_TXN *txn, DB *db) {
    DBT extra;
    unsigned int e = MAGIC_EXTRA;
    DBT *extrap = dbt_init(&extra, &e, sizeof(e));
    int r = db->update_broadcast(db, txn, extrap, 0); CKERR(r);
    return r;
}

static void chk_updated(const unsigned int k, const unsigned int v) {
    assert(v == _u(_v(k), _e(k)));
}

static void chk_original(const unsigned int k, const unsigned int v) {
    assert(v == _v(k));
}

static int do_verify_results(DB_TXN *txn, DB *db, void (*check_val)(const unsigned int k, const unsigned int v)) {
    int r = 0;
    DBT key, val;
    unsigned int i, *vp;
    DBT *keyp = dbt_init(&key, &i, sizeof(i));
    DBT *valp = dbt_init(&val, NULL, 0);
    for (i = 0; i < NUM_KEYS; ++i) {
        r = db->get(db, txn, keyp, valp, 0); CKERR(r);
        assert(val.size == sizeof(*vp));
        CAST_FROM_VOIDP(vp, val.data);
        check_val(i, *vp);
    }
    return r;
}

int test_main(int argc, char * const argv[]) {
    parse_args(argc, argv);
    setup();

    DB *db;

    IN_TXN_COMMIT(env, NULL, txn_1, 0, {
            { int chk_r = db_create(&db, env, 0); CKERR(chk_r); }
            { int chk_r = db->open(db, txn_1, "foo.db", NULL, DB_BTREE, DB_CREATE, 0666); CKERR(chk_r); }

            { int chk_r = do_inserts(txn_1, db); CKERR(chk_r); }
        });

    IN_TXN_ABORT(env, NULL, txn_2, 0, {
            { int chk_r = do_updates(txn_2, db); CKERR(chk_r); }

            IN_TXN_COMMIT(env, txn_2, txn_21, 0, {
                    { int chk_r = do_verify_results(txn_21, db, chk_updated); CKERR(chk_r); }
                });
        });

    IN_TXN_COMMIT(env, NULL, txn_3, 0, {
            { int chk_r = do_verify_results(txn_3, db, chk_original); CKERR(chk_r); }
        });

    { int chk_r = db->close(db, 0); CKERR(chk_r); }

    cleanup();

    return 0;
}
