blob: 99e1b8f14aa81000e6f1579fb5e193366f5f865e [file] [log] [blame]
// Copyright 2014 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.
#include "base/memory/scoped_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/sequenced_task_runner.h"
#include "sync/base/sync_export.h"
#include "sync/internal_api/public/base/model_type.h"
#include "sync/internal_api/public/sync_core_proxy.h"
namespace syncer {
class SyncCore;
class NonBlockingTypeProcessor;
// Encapsulates a reference to the sync core and the thread it's running on.
// Used by sync's data types to connect with the sync core.
// It is epxected that this object will be copied to and used on many different
// threads. It is small and safe to pass by value.
class SYNC_EXPORT_PRIVATE SyncCoreProxyImpl : public SyncCoreProxy {
scoped_refptr<base::SequencedTaskRunner> sync_task_runner,
base::WeakPtr<SyncCore> sync_core);
virtual ~SyncCoreProxyImpl();
// Attempts to connect a non-blocking type to the sync core.
// This may fail under some unusual circumstances, like shutdown. Due to the
// nature of WeakPtrs and cross-thread communication, the caller will be
// unable to distinguish a slow success from failure.
// Must be called from the thread where the data type lives.
virtual void ConnectTypeToCore(
syncer::ModelType type,
base::WeakPtr<NonBlockingTypeProcessor> type_processor) OVERRIDE;
virtual scoped_ptr<SyncCoreProxy> Clone() const OVERRIDE;
// A SequencedTaskRunner representing the thread where the SyncCore lives.
scoped_refptr<base::SequencedTaskRunner> sync_task_runner_;
// The SyncCore this object is wrapping.
base::WeakPtr<SyncCore> sync_core_;
} // namespace syncer