text: // Copyright (c) 2012 The Chromium Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  #ifndef SYNC_INTERNAL_API_PUBLIC_READ_TRANSACTION_H_
  #define SYNC_INTERNAL_API_PUBLIC_READ_TRANSACTION_H_
  
  #include "base/compiler_specific.h"
  #include "sync/internal_api/public/base_transaction.h"
  
  namespace tracked_objects {
  class Location;
  }  // namespace tracked_objects
  
  namespace syncer {
  
  struct UserShare;
  
  // Sync API's ReadTransaction is a read-only BaseTransaction.  It wraps
  // a syncable::ReadTransaction.
  class ReadTransaction : public BaseTransaction {
   public:
    // Start a new read-only transaction on the specified repository.
    ReadTransaction(const tracked_objects::Location& from_here,
                    UserShare* share);
  
    // Resume the middle of a transaction. Will not close transaction.
    ReadTransaction(UserShare* share, syncable::BaseTransaction* trans);
  
    virtual ~ReadTransaction();
  
    // BaseTransaction override.
    virtual syncable::BaseTransaction* GetWrappedTrans() const OVERRIDE;
   private:
    void* operator new(size_t size);  // Transaction is meant for stack use only.
  
    // The underlying syncable object which this class wraps.
    syncable::BaseTransaction* transaction_;
    bool close_transaction_;
  
    DISALLOW_COPY_AND_ASSIGN(ReadTransaction);
  };
  
  }  // namespace syncer
  
  #endif  // SYNC_INTERNAL_API_PUBLIC_READ_TRANSACTION_H_
  