mariadb/cxx/db.cpp

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

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  The technology is licensed by the Massachusetts Institute of
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  Foundation of State University of New York at Stony Brook under
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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."

#include <assert.h>
#include <db.h>
#include <errno.h>
#include <db_cxx.h>

#define do_maybe_error(errno) 

Db::Db(DbEnv *env, u_int32_t flags)
    :      the_Env(env)
{
    assert(env); // modern versions of TokuDB require an env.
    the_db   = 0;

    is_private_env = (the_Env == 0);

    DB *tmp_db;
    int ret = db_create(&tmp_db, the_Env->get_DB_ENV(), flags & ~(DB_CXX_NO_EXCEPTIONS));
    if (ret!=0) {
	the_Env->maybe_throw_error(ret);
	// Otherwise cannot do much
	return;
    }
    the_db = tmp_db; 
    tmp_db->api_internal = this;
    if (is_private_env) {
	the_Env = new DbEnv(tmp_db->dbenv, flags & DB_CXX_NO_EXCEPTIONS);
    }
}

Db::~Db() {
    if (the_db) {
	close(0); // the user should have called close, but we do it here if not done.
	assert(the_db==0);
    }
    if (is_private_env && the_Env) {
	the_Env->close(0);
	delete the_Env;
    }
}

int Db::set_flags(u_int32_t flags) {
    int ret = the_db->set_flags(the_db, flags);
    return the_Env->maybe_throw_error(ret);
}

int Db::get_flags(u_int32_t *flags) {
    int ret = the_db->get_flags(the_db, flags);
    return the_Env->maybe_throw_error(ret);
}

int Db::close (u_int32_t flags) {
    if (!the_db) {
	return the_Env->maybe_throw_error(EINVAL);
    }
    the_db->api_internal = 0;


    int ret = the_db->close(the_db, flags);

    the_db = 0;

    int no_exceptions = the_Env->do_no_exceptions; // Get this out before possibly deleting the env
    
    if (is_private_env) {
	// The env was closed by the_db->close, we have to tell the DbEnv that the DB_ENV is gone, and delete it.
	the_Env->the_env = 0;
	delete the_Env;
	the_Env=0;
    }

    // Do we need to clean up "private environments"?
    // What about cursors?  They should be cleaned up already, but who did it?

    // This maybe_throw must be the static one because the env is gone.
    return DbEnv::maybe_throw_error(ret, NULL, no_exceptions);
}

int Db::open(DbTxn *txn, const char *filename, const char *subname, DBTYPE typ, u_int32_t flags, int mode) {
    int ret = the_db->open(the_db, txn->get_DB_TXN(), filename, subname, typ, flags, mode);
    return the_Env->maybe_throw_error(ret);
}

int Db::del(DbTxn *txn, Dbt *key, u_int32_t flags) {
    int ret = the_db->del(the_db, txn->get_DB_TXN(), key->get_DBT(), flags);
    return the_Env->maybe_throw_error(ret);
}

int Db::get(DbTxn *txn, Dbt *key, Dbt *data, u_int32_t flags) {
    int ret = the_db->get(the_db, txn->get_DB_TXN(), key->get_DBT(), data->get_DBT(), flags);
    return the_Env->maybe_throw_error(ret);
}

int Db::put(DbTxn *txn, Dbt *key, Dbt *data, u_int32_t flags) {
    int ret = the_db->put(the_db, txn->get_DB_TXN(), key->get_DBT(), data->get_DBT(), flags);
    return the_Env->maybe_throw_error(ret);
}

int Db::cursor(DbTxn *txn, Dbc **cursorp, u_int32_t flags) {
    int ret = the_db->cursor(the_db, txn->get_DB_TXN(), (DBC**)cursorp, flags);
    return the_Env->maybe_throw_error(ret);
}

int Db::set_pagesize(u_int32_t size) {
    int ret = the_db->set_pagesize(the_db, size);
    return the_Env->maybe_throw_error(ret);
}

int Db::remove(const char *file, const char *database, u_int32_t flags) {
    int ret = the_db->remove(the_db, file, database, flags);
    the_db = 0;
    return the_Env->maybe_throw_error(ret);
}

#if 0
extern "C" int toku_bt_compare_callback_c(DB *db_c, const DBT *a, const DBT *b) {
    Db *db_cxx=Db::get_Db(db_c);
    return db_cxx->do_bt_compare_callback_cxx(db_cxx, Dbt::get_const_Dbt(a), Dbt::get_const_Dbt(b));
}

int Db::do_bt_compare_callback_cxx(Db *db, const Dbt *a, const Dbt *b) {
    return the_Env->bt_compare_callback_cxx(db, a, b);
}

int Db::set_bt_compare(int (*bt_compare_callback)(Db *, const Dbt *, const Dbt *)) {
    bt_compare_callback_cxx = bt_compare_callback;
    int ret = the_db->set_bt_compare(the_db, toku_bt_compare_callback_c);
    return the_Env->maybe_throw_error(ret);
}

int Db::set_bt_compare(bt_compare_fcn_type bt_compare_fcn) {
    int ret = the_db->set_bt_compare(the_db, bt_compare_fcn);
    return the_Env->maybe_throw_error(ret);
}
#endif

int Db::fd(int *fdp) {
    int ret = the_db->fd(the_db, fdp);
    return the_Env->maybe_throw_error(ret);
}

extern "C" int toku_dup_compare_callback_c(DB *db_c, const DBT *a, const DBT *b) {
    Db *db_cxx=Db::get_Db(db_c);
    return db_cxx->dup_compare_callback_cxx(db_cxx, Dbt::get_const_Dbt(a), Dbt::get_const_Dbt(b));
}

void Db::set_errpfx(const char *errpfx) {
    the_Env->set_errpfx(errpfx);
}

void Db::set_error_stream(std::ostream *new_error_stream) {
    the_Env->set_error_stream(new_error_stream);
}