cxx_txn.cpp   [plain text]

/*-
 * See the file LICENSE for redistribution information.
 *
 * Copyright (c) 1997-2003
 *	Sleepycat Software.  All rights reserved.
 */

#include "db_config.h"

#ifndef lint
static const char revid[] = "$Id: cxx_txn.cpp,v 1.2 2004/03/30 01:21:24 jtownsen Exp $";
#endif /* not lint */

#include <errno.h>

#include "db_cxx.h"
#include "dbinc/cxx_int.h"

#include "db_int.h"
#include "dbinc/txn.h"

// Helper macro for simple methods that pass through to the
// underlying C method. It may return an error or raise an exception.
// Note this macro expects that input _argspec is an argument
// list element (e.g., "char *arg") and that _arglist is the arguments
// that should be passed through to the C method (e.g., "(db, arg)")
//
#define	DBTXN_METHOD(_name, _delete, _argspec, _arglist)		\
int DbTxn::_name _argspec						\
{									\
	int ret;							\
	DB_TXN *txn = unwrap(this);					\
									\
	ret = txn->_name _arglist;					\
	/* Weird, but safe if we don't access this again. */		\
	if (_delete)							\
		delete this;						\
	if (!DB_RETOK_STD(ret))						\
	DB_ERROR(DbEnv::get_DbEnv(txn->mgrp->dbenv), \
		"DbTxn::" # _name, ret, ON_ERROR_UNKNOWN);	\
	return (ret);							\
}

// private constructor, never called but needed by some C++ linkers
DbTxn::DbTxn()
:	imp_(0)
{
}

DbTxn::DbTxn(DB_TXN *txn)
:	imp_(wrap(txn))
{
	txn->api_internal = this;
}

DbTxn::~DbTxn()
{
}

DBTXN_METHOD(abort, 1, (), (txn))
DBTXN_METHOD(commit, 1, (u_int32_t flags), (txn, flags))
DBTXN_METHOD(discard, 1, (u_int32_t flags), (txn, flags))

u_int32_t DbTxn::id()
{
	DB_TXN *txn;

	txn = unwrap(this);
	return (txn->id(txn));		// no error
}

DBTXN_METHOD(prepare, 0, (u_int8_t *gid), (txn, gid))
DBTXN_METHOD(set_timeout, 0, (db_timeout_t timeout, u_int32_t flags),
    (txn, timeout, flags))

// static method
DbTxn *DbTxn::wrap_DB_TXN(DB_TXN *txn)
{
	DbTxn *wrapped_txn = get_DbTxn(txn);
	if (wrapped_txn == NULL)
		wrapped_txn = new DbTxn(txn);
	return wrapped_txn;
}