/sqlite3cc

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  • Committer: edam
  • Date: 2010-01-28 12:21:03 UTC
  • Revision ID: edam@waxworlds.org-20100128122103-v3gs6hro5h7ffnhb
- further initial development
- basic support for: queries, rows (query results)
- filename, comment header and project name consistency

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src/transaction.cc
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#include <sqlite3cc/transaction.h>
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#include <sqlite3cc/database.h>
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#include <sqlite3cc/exception.h>
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#include <boost/thread.hpp>
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#include <boost/lexical_cast.hpp>
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sqlite::basic_transaction::basic_transaction(
 
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sqlite::transaction::transaction(
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        database &database )
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        :
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        _database( database )
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{
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}
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void sqlite::basic_transaction::begin()
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{
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        _database.exec( "BEGIN" );
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}
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void sqlite::basic_transaction::commit()
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{
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        _database.exec( "COMMIT" );
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}
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void sqlite::basic_transaction::rollback()
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{
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        _database.exec( "ROLLBACK" );
 
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        int error_code = _database.exec( "BEGIN" );
 
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        if( error_code != SQLITE_OK ) throw sqlite_error( error_code );
 
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}
 
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sqlite::transaction::transaction(
 
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        database &database,
 
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        const std::string &begin_sql,
 
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        const std::string &rollback_sql )
 
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        :
 
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        _database( database ),
 
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        _rollback_sql( rollback_sql )
 
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{
 
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        int error_code = _database.exec( begin_sql );
 
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        if( error_code != SQLITE_OK ) throw sqlite_error( error_code );
 
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}
 
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sqlite::transaction::~transaction() throw( )
 
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{
 
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        rollback();
 
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}
 
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void sqlite::transaction::commit()
 
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{
 
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        int error_code = _database.exec( "COMMIT" );
 
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        if( error_code != SQLITE_OK ) throw sqlite_error( error_code );
 
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}
 
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void sqlite::transaction::rollback()
 
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{
 
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        int error_code = _database.exec(
 
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                _rollback_sql.empty()? "ROLLBACK" : _rollback_sql );
 
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        if( error_code != SQLITE_OK ) throw sqlite_error( error_code );
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}
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sqlite::exclusive_transaction::exclusive_transaction(
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        database &database )
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        :
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        basic_transaction( database )
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{
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}
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void sqlite::exclusive_transaction::begin()
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{
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        _database.exec( "BEGIN EXCLUSIVE" );
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}
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sqlite::recursive_transaction::recursive_transaction(
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        database &database )
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        :
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        basic_transaction( database )
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{
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        static unsigned long long i = 0;
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        unsigned long long my_i;
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        static boost::mutex mutex;
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        {
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                boost::lock_guard< boost::mutex > lock( mutex );
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                my_i = i++;
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        }
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        _sp_name = "_" + boost::lexical_cast< std::string >( my_i++ );
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}
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void sqlite::recursive_transaction::begin()
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{
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        _database.exec( "SAVEPOINT " + _sp_name );
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}
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void sqlite::recursive_transaction::commit()
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{
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        _database.exec( "RELEASE " + _sp_name );
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}
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void sqlite::recursive_transaction::rollback()
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{
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        _database.exec( "ROLLBACK TO " + _sp_name );
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        // we have rolled back this transaction's savepoint, but the savepoint will
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        // remain on the transaction stack unless we also release it
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        _database.exec( "RELEASE " + _sp_name );
 
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        transaction( database, "BEGIN EXCLUSIVE" )
 
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{
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}