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/*
* transaction.cc
*
* Copyright (C) 2009 Tim Marston <edam@waxworlds.org>
*
* This file is part of sqlite3cc (hereafter referred to as "this program").
* See http://www.waxworlds.org/edam/software/sqlite3cc for more information.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <sqlite3cc/transaction.h>
#include <sqlite3cc/database.h>
#include <sqlite3cc/exception.h>
#include <boost/thread.hpp>
#include <boost/lexical_cast.hpp>
sqlite::basic_transaction::basic_transaction(
database &database )
:
_database( database )
{
}
void sqlite::basic_transaction::begin()
{
_database.exec( "BEGIN" );
}
void sqlite::basic_transaction::commit()
{
_database.exec( "COMMIT" );
}
void sqlite::basic_transaction::invalidate_queries()
{
while( sqlite3_stmt *handle = sqlite3_next_stmt( _database._handle, NULL ) )
if( int code = sqlite3_reset( handle ) )
throw sqlite_error( _database, code );
}
void sqlite::basic_transaction::rollback()
{
// we must invalidate any active queries when rolling back
invalidate_queries();
_database.exec( "ROLLBACK" );
}
sqlite::immediate_transaction::immediate_transaction(
database &database )
:
basic_transaction( database )
{
}
void sqlite::immediate_transaction::begin()
{
_database.exec( "BEGIN IMMEDIATE" );
}
sqlite::exclusive_transaction::exclusive_transaction(
database &database )
:
basic_transaction( database )
{
}
void sqlite::exclusive_transaction::begin()
{
_database.exec( "BEGIN EXCLUSIVE" );
}
sqlite::recursive_transaction::recursive_transaction(
database &database )
:
basic_transaction( database )
{
static unsigned long long i = 0;
static boost::mutex mutex;
unsigned long long my_i;
{
boost::lock_guard< boost::mutex > lock( mutex );
my_i = i++;
}
_sp_name = "_" + boost::lexical_cast< std::string >( my_i++ );
}
void sqlite::recursive_transaction::begin()
{
_database.exec( "SAVEPOINT " + _sp_name );
}
void sqlite::recursive_transaction::commit()
{
_database.exec( "RELEASE " + _sp_name );
}
void sqlite::recursive_transaction::rollback()
{
// we must invalidate any active queries when rolling back
invalidate_queries();
_database.exec( "ROLLBACK TO " + _sp_name );
// we have rolled back this transaction's savepoint, but the savepoint will
// remain on the transaction stack unless we also release it
_database.exec( "RELEASE " + _sp_name );
}
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