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// Copyright 2011 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "sql/transaction.h"
#include "base/check.h"
#include "base/sequence_checker.h"
#include "sql/database.h"
namespace sql {
Transaction::Transaction(Database* database) : database_(*database) {
DCHECK(database);
}
Transaction::~Transaction() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
#if DCHECK_IS_ON()
DCHECK(begin_called_)
<< "Begin() not called immediately after Transaction creation";
#endif // DCHECK_IS_ON()
if (is_active_)
database_->RollbackTransaction();
}
bool Transaction::Begin() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
#if DCHECK_IS_ON()
DCHECK(!begin_called_) << __func__ << " already called";
begin_called_ = true;
#endif // DCHECK_IS_ON()
DCHECK(!is_active_);
is_active_ = database_->BeginTransaction();
return is_active_;
}
void Transaction::Rollback() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
#if DCHECK_IS_ON()
DCHECK(begin_called_) << __func__ << " called before Begin()";
DCHECK(!commit_called_) << __func__ << " called after Commit()";
DCHECK(!rollback_called_) << __func__ << " called twice";
rollback_called_ = true;
#endif // DCHECK_IS_ON()
DCHECK(is_active_) << __func__ << " called after Begin() failed";
is_active_ = false;
database_->RollbackTransaction();
}
bool Transaction::Commit() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
#if DCHECK_IS_ON()
DCHECK(begin_called_) << __func__ << " called before Begin()";
DCHECK(!rollback_called_) << __func__ << " called after Rollback()";
DCHECK(!commit_called_) << __func__ << " called after Commit()";
commit_called_ = true;
#endif // DCHECK_IS_ON()
DCHECK(is_active_) << __func__ << " called after Begin() failed";
is_active_ = false;
return database_->CommitTransaction();
}
} // namespace sql
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