TransactionScope.h

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/*!********************************************************************
 
  Audacity: A Digital Audio Editor
 
  @file TransactionScope.h
 
  Paul Licameli split from DBConnection.h
 
**********************************************************************/
#ifndef __AUDACITY_TRANSACTION_SCOPE__
#define __AUDACITY_TRANSACTION_SCOPE__
 
#include "GlobalVariable.h"
class AudacityProject;
#include <functional>
#include <memory>
#include <wx/string.h>
 
class TransactionScopeImpl;
 
 
class TRANSACTIONS_API TransactionScope
{
public:
   struct TRANSACTIONS_API Factory : GlobalHook<Factory,
      std::unique_ptr<TransactionScopeImpl>(AudacityProject &)
   > {};
 
 
   TransactionScope(AudacityProject &project, const char *name);
 
   ~TransactionScope();
 
   bool Commit();
 
private:
   std::unique_ptr<TransactionScopeImpl> mpImpl;
   bool mInTrans;
   wxString mName;
};
 
class TRANSACTIONS_API TransactionScopeImpl {
public:
   virtual ~TransactionScopeImpl();
   virtual bool TransactionStart(const wxString &name) = 0;
   virtual bool TransactionCommit(const wxString &name) = 0;
   virtual bool TransactionRollback(const wxString &name) = 0;
};
 
#endif