log_method.c

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/*-
 * See the file LICENSE for redistribution information.
 *
 * Copyright (c) 1999, 2000
 *      Sleepycat Software.  All rights reserved.
 */
#include "config.h"

#ifndef lint
static const char revid[] = "$Id: log__method_8c-source.html,v 1.1 2008/06/08 10:20:24 sebdiaz Exp $";
#endif /* not lint */

#ifndef NO_SYSTEM_INCLUDES
#include <sys/types.h>

#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#endif

#ifdef  HAVE_RPC
#include "db_server.h"
#endif

#include "db_int.h"
#include "log.h"

#ifdef HAVE_RPC
#include "gen_client_ext.h"
#include "rpc_client_ext.h"
#endif

static int __log_set_lg_max __P((DB_ENV *, u_int32_t));
static int __log_set_lg_bsize __P((DB_ENV *, u_int32_t));
static int __log_set_lg_dir __P((DB_ENV *, const char *));

/*
 * CDB___log_dbenv_create --
 *      Log specific initialization of the DB_ENV structure.
 *
 * PUBLIC: void CDB___log_dbenv_create __P((DB_ENV *));
 */
void
CDB___log_dbenv_create(dbenv)
        DB_ENV *dbenv;
{
        dbenv->lg_bsize = LG_BSIZE_DEFAULT;
        dbenv->set_lg_bsize = __log_set_lg_bsize;

        dbenv->lg_max = LG_MAX_DEFAULT;
        dbenv->set_lg_max = __log_set_lg_max;

        dbenv->set_lg_dir = __log_set_lg_dir;
#ifdef  HAVE_RPC
        /*
         * If we have a client, overwrite what we just setup to
         * point to client functions.
         */
        if (F_ISSET(dbenv, DB_ENV_RPCCLIENT)) {
                dbenv->set_lg_bsize = __dbcl_set_lg_bsize;
                dbenv->set_lg_max = __dbcl_set_lg_max;
                dbenv->set_lg_dir = __dbcl_set_lg_dir;
        }
#endif
}

/*
 * __log_set_lg_bsize --
 *      Set the log buffer size.
 */
static int
__log_set_lg_bsize(dbenv, lg_bsize)
        DB_ENV *dbenv;
        u_int32_t lg_bsize;
{
        ENV_ILLEGAL_AFTER_OPEN(dbenv, "set_lg_bsize");

                                        /* Let's not be silly. */
        if (lg_bsize > dbenv->lg_max / 4) {
                CDB___db_err(dbenv, "log buffer size must be <= log file size / 4");
                return (EINVAL);
        }

        dbenv->lg_bsize = lg_bsize;
        return (0);
}

/*
 * __log_set_lg_max --
 *      Set the maximum log file size.
 */
static int
__log_set_lg_max(dbenv, lg_max)
        DB_ENV *dbenv;
        u_int32_t lg_max;
{
        ENV_ILLEGAL_AFTER_OPEN(dbenv, "set_lg_max");

                                        /* Let's not be silly. */
        if (lg_max < dbenv->lg_bsize * 4) {
                CDB___db_err(dbenv, "log file size must be >= log buffer size * 4");
                return (EINVAL);
        }

        dbenv->lg_max = lg_max;
        return (0);
}

/*
 * __log_set_lg_dir --
 *      Set the log file directory.
 */
static int
__log_set_lg_dir(dbenv, dir)
        DB_ENV *dbenv;
        const char *dir;
{
        if (dbenv->db_log_dir != NULL)
                CDB___os_freestr(dbenv->db_log_dir);
        return (CDB___os_strdup(dbenv, dir, &dbenv->db_log_dir));
}

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