cxx_env.cpp

这是linux下运行的mysql软件包,可用于linux 下安装 php + mysql + apach 的网络配置

	DB_ENV *env = unwrap(this);
	int ret;
	DB_MPOOLFILE *mpf;

	if (env == NULL)
		ret = EINVAL;
	else
		ret = env->memp_fcreate(env, &mpf, flags);

	if (DB_RETOK_STD(ret)) {
		*dbmfp = new DbMpoolFile();
		(*dbmfp)->imp_ = wrap(mpf);
	} else
		DB_ERROR("DbMpoolFile::f_create", ret, ON_ERROR_UNKNOWN);

	return (ret);
}

DBENV_METHOD(memp_register,
    (int ftype, pgin_fcn_type pgin_fcn, pgout_fcn_type pgout_fcn),
    (dbenv, ftype, pgin_fcn, pgout_fcn))

// memory pool methods
DBENV_METHOD(memp_stat,
    (DB_MPOOL_STAT **gsp, DB_MPOOL_FSTAT ***fsp, u_int32_t flags),
    (dbenv, gsp, fsp, flags))

DBENV_METHOD(memp_sync, (DbLsn *sn), (dbenv, sn))

DBENV_METHOD(memp_trickle, (int pct, int *nwrotep), (dbenv, pct, nwrotep))

// If an error occurred during the constructor, report it now.
// Otherwise, call the underlying DB->open method.
//
int DbEnv::open(const char *db_home, u_int32_t flags, int mode)
{
	int ret;
	DB_ENV *env = unwrap(this);

	if (construct_error_ != 0)
		ret = construct_error_;
	else
		ret = env->open(env, db_home, flags, mode);

	if (!DB_RETOK_STD(ret))
		DB_ERROR("DbEnv::open", ret, error_policy());

	return (ret);
}

int DbEnv::remove(const char *db_home, u_int32_t flags)
{
	int ret;
	DB_ENV *env = unwrap(this);

	// after a remove (no matter if success or failure),
	// the underlying DB_ENV object must not be accessed,
	// so we clean up in advance.
	//
	cleanup();

	if ((ret = env->remove(env, db_home, flags)) != 0)
		DB_ERROR("DbEnv::remove", ret, error_policy());

	return (ret);
}

// Report an error associated with the DbEnv.
// error_policy is one of:
//   ON_ERROR_THROW     throw an error
//   ON_ERROR_RETURN    do nothing here, the caller will return an error
//   ON_ERROR_UNKNOWN   defer the policy to policy saved in DbEnv::DbEnv
//
void DbEnv::runtime_error(const char *caller, int error, int error_policy)
{
	if (error_policy == ON_ERROR_UNKNOWN)
		error_policy = last_known_error_policy;
	if (error_policy == ON_ERROR_THROW) {
		// Creating and throwing the object in two separate
		// statements seems to be necessary for HP compilers.
		switch (error) {
		case DB_LOCK_DEADLOCK:
			{
				DbDeadlockException dl_except(caller);
				throw dl_except;
			}
			break;
		case DB_RUNRECOVERY:
			{
				DbRunRecoveryException rr_except(caller);
				throw rr_except;
			}
			break;
		default:
			{
				DbException except(caller, error);
				throw except;
			}
			break;
		}
	}
}

// Like DbEnv::runtime_error, but issue a DbMemoryException
// based on the fact that this Dbt is not large enough.
void DbEnv::runtime_error_dbt(const char *caller, Dbt *dbt, int error_policy)
{
	if (error_policy == ON_ERROR_UNKNOWN)
		error_policy = last_known_error_policy;
	if (error_policy == ON_ERROR_THROW) {
		// Creating and throwing the object in two separate
		// statements seems to be necessary for HP compilers.
		DbMemoryException except(caller, dbt);
		throw except;
	}
}

// Like DbEnv::runtime_error, but issue a DbLockNotGrantedException,
// or a regular runtime error.
// call regular runtime_error if it
void DbEnv::runtime_error_lock_get(const char *caller, int error,
    db_lockop_t op, db_lockmode_t mode, const Dbt *obj,
    DbLock lock, int index, int error_policy)
{
	if (error != DB_LOCK_NOTGRANTED) {
		runtime_error(caller, error, error_policy);
		return;
	}

	if (error_policy == ON_ERROR_UNKNOWN)
		error_policy = last_known_error_policy;
	if (error_policy == ON_ERROR_THROW) {
		// Creating and throwing the object in two separate
		// statements seems to be necessary for HP compilers.
		DbLockNotGrantedException except(caller, op, mode,
		    obj, lock, index);
		throw except;
	}
}

// static method
char *DbEnv::strerror(int error)
{
	return (db_strerror(error));
}

void DbEnv::_stream_error_function(const char *prefix, char *message)
{
	// HP compilers need the extra casts, we don't know why.
	if (error_stream_) {
		if (prefix) {
			(*error_stream_) << prefix << (const char *)": ";
		}
		if (message) {
			(*error_stream_) << (const char *)message;
		}
		(*error_stream_) << (const char *)"\n";
	}
}

// set methods

DBENV_METHOD_VOID(set_errfile, (FILE *errfile), (dbenv, errfile))
DBENV_METHOD_VOID(set_errpfx, (const char *errpfx), (dbenv, errpfx))

// We keep these alphabetical by field name,
// for comparison with Java's list.
//
DBENV_METHOD(set_data_dir, (const char *dir), (dbenv, dir))
DBENV_METHOD(set_encrypt, (const char *passwd, int flags),
    (dbenv, passwd, flags))
DBENV_METHOD(set_lg_bsize, (u_int32_t bsize), (dbenv, bsize))
DBENV_METHOD(set_lg_dir, (const char *dir), (dbenv, dir))
DBENV_METHOD(set_lg_max, (u_int32_t max), (dbenv, max))
DBENV_METHOD(set_lg_regionmax, (u_int32_t regionmax), (dbenv, regionmax))
DBENV_METHOD(set_lk_detect, (u_int32_t detect), (dbenv, detect))
DBENV_METHOD(set_lk_max, (u_int32_t max), (dbenv, max))
DBENV_METHOD(set_lk_max_lockers, (u_int32_t max_lockers), (dbenv, max_lockers))
DBENV_METHOD(set_lk_max_locks, (u_int32_t max_locks), (dbenv, max_locks))
DBENV_METHOD(set_lk_max_objects, (u_int32_t max_objects), (dbenv, max_objects))
DBENV_METHOD(set_mp_mmapsize, (size_t mmapsize), (dbenv, mmapsize))
DBENV_METHOD(set_tmp_dir, (const char *tmp_dir), (dbenv, tmp_dir))
DBENV_METHOD(set_tx_max, (u_int32_t tx_max), (dbenv, tx_max))

DBENV_METHOD_QUIET(set_alloc,
    (db_malloc_fcn_type malloc_fcn, db_realloc_fcn_type realloc_fcn,
    db_free_fcn_type free_fcn),
    (dbenv, malloc_fcn, realloc_fcn, free_fcn))

void DbEnv::set_app_private(void *value)
{
	unwrap(this)->app_private = value;
}

DBENV_METHOD(set_cachesize,
    (u_int32_t gbytes, u_int32_t bytes, int ncache),
    (dbenv, gbytes, bytes, ncache))

void DbEnv::set_errcall(void (*arg)(const char *, char *))
{
	DB_ENV *dbenv = unwrap(this);

	// XXX
	// We are casting from a function ptr declared with C++
	// linkage to one (same arg types) declared with C
	// linkage.  It's hard to imagine a pair of C/C++
	// compilers from the same vendor for which this
	// won't work.  Unfortunately, we can't use a
	// intercept function like the others since the
	// function does not have a (DbEnv*) as one of
	// the args.  If this causes trouble, we can pull
	// the same trick we use in Java, namely stuffing
	// a (DbEnv*) pointer into the prefix.  We're
	// avoiding this for the moment because it obfuscates.
	//
	(*(dbenv->set_errcall))(dbenv, (db_errcall_fcn_type)arg);
}

// Note: This actually behaves a bit like a static function,
// since DB_ENV.db_errcall has no information about which
// db_env triggered the call.  A user that has multiple DB_ENVs
// will simply not be able to have different streams for each one.
//
void DbEnv::set_error_stream(__DB_OSTREAMCLASS *stream)
{
	DB_ENV *dbenv = unwrap(this);

	error_stream_ = stream;
	dbenv->set_errcall(dbenv, (stream == 0) ? 0 :
			   _stream_error_function_c);
}

int DbEnv::set_feedback(void (*arg)(DbEnv *, int, int))
{
	DB_ENV *dbenv = unwrap(this);

	feedback_callback_ = arg;

	return ((*(dbenv->set_feedback))(dbenv, _feedback_intercept_c));
}

DBENV_METHOD(set_flags, (u_int32_t flags, int onoff), (dbenv, flags, onoff))
DBENV_METHOD(set_lk_conflicts, (u_int8_t *lk_conflicts, int lk_max),
    (dbenv, lk_conflicts, lk_max))

int DbEnv::set_paniccall(void (*arg)(DbEnv *, int))
{
	DB_ENV *dbenv = unwrap(this);

	paniccall_callback_ = arg;

	return ((*(dbenv->set_paniccall))(dbenv, _paniccall_intercept_c));
}

DBENV_METHOD(set_rpc_server,
    (void *cl, char *host, long tsec, long ssec, u_int32_t flags),
    (dbenv, cl, host, tsec, ssec, flags))
DBENV_METHOD(set_shm_key, (long shm_key), (dbenv, shm_key))
// Note: this changes from last_known_error_policy to error_policy()
DBENV_METHOD(set_tas_spins, (u_int32_t arg), (dbenv, arg))

int DbEnv::set_app_dispatch
    (int (*arg)(DbEnv *, Dbt *, DbLsn *, db_recops))
{
	DB_ENV *dbenv = unwrap(this);
	int ret;

	app_dispatch_callback_ = arg;
	if ((ret = (*(dbenv->set_app_dispatch))(dbenv,
	    _app_dispatch_intercept_c)) != 0)
		DB_ERROR("DbEnv::set_app_dispatch", ret, error_policy());

	return (ret);
}

DBENV_METHOD(set_tx_timestamp, (time_t *timestamp), (dbenv, timestamp))
DBENV_METHOD(set_verbose, (u_int32_t which, int onoff), (dbenv, which, onoff))

int DbEnv::txn_begin(DbTxn *pid, DbTxn **tid, u_int32_t flags)
{
	DB_ENV *env = unwrap(this);
	DB_TXN *txn;
	int ret;

	ret = env->txn_begin(env, unwrap(pid), &txn, flags);
	if (DB_RETOK_STD(ret))
		*tid = new DbTxn(txn);
	else
		DB_ERROR("DbEnv::txn_begin", ret, error_policy());

	return (ret);
}

DBENV_METHOD(txn_checkpoint, (u_int32_t kbyte, u_int32_t min, u_int32_t flags),
    (dbenv, kbyte, min, flags))

int DbEnv::txn_recover(DbPreplist *preplist, long count,
    long *retp, u_int32_t flags)
{
	DB_ENV *dbenv = unwrap(this);
	DB_PREPLIST *c_preplist;
	long i;
	int ret;

	/*
	 * We need to allocate some local storage for the
	 * returned preplist, and that requires us to do
	 * our own argument validation.
	 */
	if (count <= 0)
		ret = EINVAL;
	else
		ret = __os_malloc(dbenv, sizeof(DB_PREPLIST) * count,
		    &c_preplist);

	if (ret != 0) {
		DB_ERROR("DbEnv::txn_recover", ret, error_policy());
		return (ret);
	}

	if ((ret =
	    dbenv->txn_recover(dbenv, c_preplist, count, retp, flags)) != 0) {
		__os_free(dbenv, c_preplist);
		DB_ERROR("DbEnv::txn_recover", ret, error_policy());
		return (ret);
	}

	for (i = 0; i < *retp; i++) {
		preplist[i].txn = new DbTxn();
		preplist[i].txn->imp_ = wrap(c_preplist[i].txn);
		memcpy(preplist[i].gid, c_preplist[i].gid,
		    sizeof(preplist[i].gid));
	}

	__os_free(dbenv, c_preplist);

	return (0);
}

DBENV_METHOD(txn_stat, (DB_TXN_STAT **statp, u_int32_t flags),
    (dbenv, statp, flags))

int DbEnv::set_rep_transport(u_int32_t myid,
    int (*f_send)(DbEnv *, const Dbt *, const Dbt *, int, u_int32_t))
{
	DB_ENV *dbenv = unwrap(this);
	int ret;

	rep_send_callback_ = f_send;
	if ((ret = dbenv->set_rep_transport(dbenv,
	    myid, _rep_send_intercept_c)) != 0)
		DB_ERROR("DbEnv::set_rep_transport", ret, error_policy());

	return (ret);
}

DBENV_METHOD(rep_elect,
    (int nsites, int pri, u_int32_t timeout, int *idp),
    (dbenv, nsites, pri, timeout, idp))

int DbEnv::rep_process_message(Dbt *control, Dbt *rec, int *idp)
{
	DB_ENV *dbenv = unwrap(this);
	int ret;

	ret = dbenv->rep_process_message(dbenv, control, rec, idp);
	if (!DB_RETOK_REPPMSG(ret))
		DB_ERROR("DbEnv::rep_process_message", ret, error_policy());

	return (ret);
}

DBENV_METHOD(rep_start,
    (Dbt *cookie, u_int32_t flags),
    (dbenv, (DBT *)cookie, flags))

DBENV_METHOD(rep_stat, (DB_REP_STAT **statp, u_int32_t flags),
    (dbenv, statp, flags))

DBENV_METHOD(set_rep_limit, (u_int32_t gbytes, u_int32_t bytes),
    (dbenv, gbytes, bytes))

DBENV_METHOD(set_timeout,
    (db_timeout_t timeout, u_int32_t flags),
    (dbenv, timeout, flags))

// static method
char *DbEnv::version(int *major, int *minor, int *patch)
{
	return (db_version(major, minor, patch));
}

// static method
DbEnv *DbEnv::wrap_DB_ENV(DB_ENV *dbenv)
{
	DbEnv *wrapped_env = get_DbEnv(dbenv);
	if (wrapped_env == NULL)
		wrapped_env = new DbEnv(dbenv, 0);
	return wrapped_env;
}