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/*
* transaction.cc
*
* Copyright (C) 2009 Tim Marston <tim@ed.am>
*
* This file is part of sqlite3cc (hereafter referred to as "this program").
* See http://ed.am/dev/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/connection.h>
#include <sqlite3cc/exception.h>
#include <boost/thread.hpp>
#include <boost/lexical_cast.hpp>
sqlite::detail::basic_transaction::basic_transaction(
connection &connection )
:
_connection( connection )
{
}
void sqlite::detail::basic_transaction::begin()
{
_connection.exec( "BEGIN" );
}
void sqlite::detail::basic_transaction::commit()
{
// we must reset any active queries when committing
reset_active_queries();
_connection.exec( "COMMIT" );
}
void sqlite::detail::basic_transaction::reset_active_queries()
{
sqlite3_stmt *old_handle = NULL;
while( sqlite3_stmt *handle =
sqlite3_next_stmt( _connection._handle, old_handle ) )
{
int code = sqlite3_reset( handle );
if( code != SQLITE_OK ) throw sqlite_error( _connection, code );
old_handle = handle;
}
}
void sqlite::detail::basic_transaction::rollback()
{
// we must reset any active queries when rolling back
reset_active_queries();
_connection.exec( "ROLLBACK" );
}
sqlite::immediate_transaction::immediate_transaction(
connection &connection )
:
basic_transaction( connection )
{
}
void sqlite::immediate_transaction::begin()
{
_connection.exec( "BEGIN IMMEDIATE" );
}
sqlite::exclusive_transaction::exclusive_transaction(
connection &connection )
:
basic_transaction( connection )
{
}
void sqlite::exclusive_transaction::begin()
{
_connection.exec( "BEGIN EXCLUSIVE" );
}
sqlite::recursive_transaction::recursive_transaction(
connection &connection )
:
basic_transaction( connection )
{
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()
{
_connection.exec( "SAVEPOINT " + _sp_name );
}
void sqlite::recursive_transaction::commit()
{
// we must reset any active queries when committing
reset_active_queries();
_connection.exec( "RELEASE " + _sp_name );
}
void sqlite::recursive_transaction::rollback()
{
// we must reset any active queries when rolling back
reset_active_queries();
_connection.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
_connection.exec( "RELEASE " + _sp_name );
}
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