本文整理汇总了C++中DB_ENV::set_data_dir方法的典型用法代码示例。如果您正苦于以下问题：C++ DB_ENV::set_data_dir方法的具体用法？C++ DB_ENV::set_data_dir怎么用？C++ DB_ENV::set_data_dir使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类DB_ENV的用法示例。
在下文中一共展示了DB_ENV::set_data_dir方法的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: return
DB_ENV *db_setup(char *home)
{
DB_ENV *dbenv;
int ret;
/* * Create an environment and initialize it for additional error * reporting. */
if ((ret = db_env_create(&dbenv, 0)) != 0) {
return (NULL);
}
ci_debug_printf(5,"Environment created OK.\n");
// dbenv->set_data_dir(dbenv, "");
dbenv->set_data_dir(dbenv, home);
ci_debug_printf(5,"Data dir set to %s.\n", home);
/*
dbenv->set_shm_key(dbenv, 888888L);
ci_debug_printf(5,"Shared memory set.\n");
*/
/* * Specify the shared memory buffer pool cachesize: 5MB. * Databases are in a subdirectory of the environment home. */
// if ((ret = dbenv->set_cachesize(dbenv, 0, 5 * 1024 * 1024, 0)) != 0) {
// dbenv->err(dbenv, ret, "set_cachesize");
// goto err;
// }
/* Open the environment */
if ((ret = dbenv->open(dbenv, home, DB_CREATE | DB_INIT_LOCK | DB_INIT_MPOOL|DB_THREAD /*| DB_SYSTEM_MEM*/, 0)) != 0){
ci_debug_printf(1, "Environment open failed: %s\n", db_strerror(ret));
dbenv->close(dbenv, 0);
return NULL;
}
ci_debug_printf(5,"DB setup OK.\n");
return (dbenv);
}示例2: sizeof
/*
* This should be done before the program is open for business.
* As such, it does not need to be reentrant.
*/
int
open_db_env(char *topdir)
{
DB_ENV *tmpenv = NULL;
int st;
struct stat64 sbuf;
char logdir[MAXPATHLEN+1];
char tmpdir[MAXPATHLEN+1];
char *dirarr[3];
int i;
if (topdir == NULL) {
return (-1);
}
snprintf(logdir, sizeof (tmpdir), "%s/.logs", topdir);
snprintf(tmpdir, sizeof (tmpdir), "%s/.tmp", topdir);
dirarr[0] = topdir;
dirarr[1] = logdir;
dirarr[2] = tmpdir;
/* first, set up the environment */
st = db_env_create(&tmpenv, 0);
if (st != 0) {
return (st);
}
/* make sure the directories exist */
for (i = 0; i < 3; i++) {
st = stat64(dirarr[i], &sbuf);
if ((st != 0) && (errno == ENOENT)) {
st = mkdirp(dirarr[i], 0744);
if (st == 0) {
st = stat64(dirarr[i], &sbuf);
}
}
if ((st == 0) && (!S_ISDIR(sbuf.st_mode))) {
st = -1;
break;
}
}
if (st != 0) {
return (st);
}
st = tmpenv->set_data_dir(tmpenv, topdir);
if (st != 0) {
return (st);
}
st = tmpenv->set_lg_dir(tmpenv, logdir);
if (st != 0) {
return (st);
}
st = tmpenv->set_tmp_dir(tmpenv, tmpdir);
if (st != 0) {
return (st);
}
st = tmpenv->set_flags(tmpenv, env_fl, 1);
if (st != 0) {
return (st);
}
/* overall database cache size */
st = tmpenv->set_cachesize(tmpenv, 0, (60 * MEGA), 1);
st = tmpenv->set_shm_key(tmpenv, FSM_SHM_MASTER_KEY);
if (st != 0) {
return (st);
}
/* log buffer in memory */
st = tmpenv->set_lg_bsize(tmpenv, (30 * MEGA));
if (st != 0) {
return (st);
}
/* set up additional error logging */
tmpenv->set_errcall(tmpenv, fsmdb_log_err);
/* Increase the number of locks available */
tmpenv->set_lk_max_locks(tmpenv, 10000);
tmpenv->set_lk_max_lockers(tmpenv, 10000);
tmpenv->set_lk_max_objects(tmpenv, 10000);
/* Increase the number of concurrent transactions available */
/* Note: Default in 4.4-20 is '20'. In later versions it's 100 */
tmpenv->set_tx_max(tmpenv, 100);
st = tmpenv->open(tmpenv, topdir, env_ofl, 0644);
if (st != 0) {
/* check for a major failure */
//.........这里部分代码省略.........
示例3: main
///////////////////
// //
// Main Function //
// //
///////////////////
int main(int argc, char *argv[]) {
/* Declare local vars */ /***********************************/
DB_ENV *dbenv; /* pointer to database environment */
DB *dbp1; /* pointer to 1st database */
DB *dbp2; /* pointer to 2nd database */
DBT key1, data1; /* Database key and data variables */
DBT key2, data2; /* Database key and data variables */
int ret; /* return code/message */
/* Creates the DB environment */
if ((ret = db_env_create(&dbenv, 0)) != 0) {
fprintf(stderr, "%s: %s\n", argv[0], db_strerror(ret));
return(1);
};
dbenv->set_errfile(dbenv, stderr);
dbenv->set_errpfx(dbenv, argv[0]);
/* Set shared memory buffer pool cachesize: 5MB. */
/* Databases are in a subdirectory of the environment home. */
if ((ret = dbenv->set_cachesize(dbenv, 0, 5 * 1024 * 1024, 0)) != 0) {
dbenv->err(dbenv, ret, "set_cachesize");
dbenv->close(dbenv, 0);
return(1);
};
if ((ret = dbenv->set_data_dir(dbenv, MY_DBENV_DIR_DATA)) != 0) {
dbenv->err(dbenv, ret, "set_data_dir: %s", MY_DBENV_DIR_DATA);
dbenv->close(dbenv, 0);
return(1);
};
/* Open the environment with full transactional support. */
dbenv->open(
dbenv,
MY_DBENV_DIR_HOME,
DB_CREATE
| DB_INIT_LOG
| DB_INIT_LOCK
| DB_INIT_MPOOL
| DB_INIT_TXN,
0
);
if (ret != 0) {
dbenv->err(dbenv, ret, "environment open: %s", MY_DBENV_DIR_HOME);
dbenv->close(dbenv, 0);
return(1);
};
/* Create first Database handle */
if ((ret = db_create(&dbp1, dbenv, 0)) != 0) {
dbenv->err(dbenv, ret, "database create");
dbenv->close(dbenv, 0);
return(1);
};
/* Opens first database */
if ((ret = dbp1->open(dbp1, NULL, MY_DB1_FILE, NULL, DB_BTREE, DB_CREATE, 0640)) != 0) {
dbenv->err(dbenv, ret, "DB->open: %s", MY_DB1_FILE);
dbp1->close(dbp1, 0);
dbenv->close(dbenv, 0);
return (ret);
};
/* Create second Database handle */
if ((ret = db_create(&dbp2, dbenv, 0)) != 0) {
dbenv->err(dbenv, ret, "database create");
dbp1->close(dbp1, 0);
dbenv->close(dbenv, 0);
return(1);
};
/* Opens second database */
if ((ret = dbp2->open(dbp2, NULL, MY_DB2_FILE, NULL, DB_BTREE, DB_CREATE, 0640)) != 0) {
dbenv->err(dbenv, ret, "DB->open: %s", MY_DB2_FILE);
dbp1->close(dbp1, 0);
dbp2->close(dbp1, 0);
dbenv->close(dbenv, 0);
return (ret);
};
/* Clears variables to avoid garbage */
memset(&key1, 0, sizeof(key1));
memset(&data1, 0, sizeof(data1));
memset(&key2, 0, sizeof(key2));
memset(&data2, 0, sizeof(data2));
/* Preps data to be added to first database */
key1.data = "fruit";
key1.size = sizeof("fruit");
data1.data = "apple";
data1.size = sizeof("apple");
/* pushes data into first database */
if ((ret = dbp1->put(dbp1, NULL, &key1, &data1, 0)) == 0) {
//.........这里部分代码省略.........