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Diffstat (limited to 'db/examples_c/ex_env.c')
| -rw-r--r-- | db/examples_c/ex_env.c | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/db/examples_c/ex_env.c b/db/examples_c/ex_env.c new file mode 100644 index 000000000..5490723a3 --- /dev/null +++ b/db/examples_c/ex_env.c @@ -0,0 +1,170 @@ +/*- + * See the file LICENSE for redistribution information. + * + * Copyright (c) 1996, 1997, 1998, 1999, 2000 + * Sleepycat Software. All rights reserved. + * + * $Id: ex_env.c,v 11.18 2000/10/27 20:32:00 dda Exp $ + */ + +#include "db_config.h" + +#ifndef NO_SYSTEM_INCLUDES +#include <sys/types.h> + +#include <stddef.h> +#include <stdio.h> +#include <stdlib.h> +#endif + +#include <db.h> + +#ifdef macintosh +#define DATABASE_HOME ":database" +#define CONFIG_DATA_DIR ":database" +#else +#ifdef DB_WIN32 +#define DATABASE_HOME "\\tmp\\database" +#define CONFIG_DATA_DIR "\\database\\files" +#else +#ifdef HAVE_VXWORKS +#define DATABASE_HOME "/ata0/vxtmp/database" +#define CONFIG_DATA_DIR "/vxtmp/vxtmp/database/files" +#else +#define DATABASE_HOME "/tmp/database" +#define CONFIG_DATA_DIR "/database/files" +#endif +#endif +#endif + +int db_setup __P((char *, char *, FILE *, char *)); +int db_teardown __P((char *, char *, FILE *, char *)); +#ifdef HAVE_VXWORKS +int ex_env __P((void)); +#define ERROR_RETURN ERROR +#define VXSHM_KEY 11 +#else +int main __P((void)); +#define ERROR_RETURN 1 +#endif + +/* + * An example of a program creating/configuring a Berkeley DB environment. + */ +int +#ifdef HAVE_VXWORKS +ex_env() +#else +main() +#endif +{ + int ret; + char *data_dir, *home; + char *progname = "ex_env"; /* Program name. */ + + /* + * All of the shared database files live in DATABASE_HOME, but + * data files will live in CONFIG_DATA_DIR. + */ + home = DATABASE_HOME; + data_dir = CONFIG_DATA_DIR; + + printf("Setup env\n"); + if ((ret = db_setup(home, data_dir, stderr, progname)) != 0) + return (ret); + + printf("Teardown env\n"); + if ((ret = db_teardown(home, data_dir, stderr, progname)) != 0) + return (ret); + + return (0); +} + +int +db_setup(home, data_dir, errfp, progname) + char *home, *data_dir, *progname; + FILE *errfp; +{ + DB_ENV *dbenv; + int ret; + + /* + * Create an environment object and initialize it for error + * reporting. + */ + if ((ret = db_env_create(&dbenv, 0)) != 0) { + fprintf(errfp, "%s: %s\n", progname, db_strerror(ret)); + return (ERROR_RETURN); + } + dbenv->set_errfile(dbenv, errfp); + dbenv->set_errpfx(dbenv, progname); + +#ifdef HAVE_VXWORKS + /* VxWorks needs to specify a base segment ID. */ + if ((ret = dbenv->set_shm_key(dbenv, VXSHM_KEY)) != 0) { + fprintf(errfp, "%s: %s\n", progname, db_strerror(ret)); + return (ERROR_RETURN); + } +#endif + + /* + * We want to specify the shared memory buffer pool cachesize, + * but everything else is the default. + */ + if ((ret = dbenv->set_cachesize(dbenv, 0, 64 * 1024, 0)) != 0) { + dbenv->err(dbenv, ret, "set_cachesize"); + dbenv->close(dbenv, 0); + return (ERROR_RETURN); + } + + /* Databases are in a subdirectory. */ + (void)dbenv->set_data_dir(dbenv, data_dir); + + /* Open the environment with full transactional support. */ + if ((ret = dbenv->open(dbenv, home, + DB_CREATE | DB_INIT_LOCK | DB_INIT_LOG | DB_INIT_MPOOL | DB_INIT_TXN, + 0)) != 0) { + dbenv->err(dbenv, ret, "environment open: %s", home); + dbenv->close(dbenv, 0); + return (ERROR_RETURN); + } + + /* Do something interesting... */ + + /* Close the handle. */ + if ((ret = dbenv->close(dbenv, 0)) != 0) { + fprintf(stderr, "DBENV->close: %s\n", db_strerror(ret)); + return (ERROR_RETURN); + } + return (0); +} + +int +db_teardown(home, data_dir, errfp, progname) + char *home, *data_dir, *progname; + FILE *errfp; +{ + DB_ENV *dbenv; + int ret; + + /* Remove the shared database regions. */ + if ((ret = db_env_create(&dbenv, 0)) != 0) { + fprintf(errfp, "%s: %s\n", progname, db_strerror(ret)); + return (ERROR_RETURN); + } + dbenv->set_errfile(dbenv, errfp); + dbenv->set_errpfx(dbenv, progname); +#ifdef HAVE_VXWORKS + if ((ret = dbenv->set_shm_key(dbenv, VXSHM_KEY)) != 0) { + fprintf(errfp, "%s: %s\n", progname, db_strerror(ret)); + return (ERROR_RETURN); + } +#endif + + (void)dbenv->set_data_dir(dbenv, data_dir); + if ((ret = dbenv->remove(dbenv, home, 0)) != 0) { + fprintf(stderr, "DBENV->remove: %s\n", db_strerror(ret)); + return (ERROR_RETURN); + } + return (0); +} |