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// 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 CHROME_BROWSER_SYNC_GLUE_BROWSER_THREAD_MODEL_WORKER_H_
#define CHROME_BROWSER_SYNC_GLUE_BROWSER_THREAD_MODEL_WORKER_H_
#pragma once
#include "base/basictypes.h"
#include "base/callback_forward.h"
#include "base/compiler_specific.h"
#include "content/public/browser/browser_thread.h"
#include "sync/engine/model_safe_worker.h"
#include "sync/util/syncer_error.h"
namespace base {
class WaitableEvent;
}
namespace browser_sync {
// A ModelSafeWorker for models that accept requests from the syncapi that need
// to be fulfilled on a browser thread, for example autofill on the DB thread.
// TODO(sync): Try to generalize other ModelWorkers (e.g. history, etc).
class BrowserThreadModelWorker : public ModelSafeWorker {
public:
BrowserThreadModelWorker(content::BrowserThread::ID thread,
ModelSafeGroup group);
virtual ~BrowserThreadModelWorker();
// ModelSafeWorker implementation. Called on the sync thread.
virtual SyncerError DoWorkAndWaitUntilDone(
const WorkCallback& work) OVERRIDE;
virtual ModelSafeGroup GetModelSafeGroup() OVERRIDE;
protected:
// Marked pure virtual so subclasses have to override, but there is
// an implementation that subclasses should use. This is so that
// (subclass)::CallDoWorkAndSignalTask shows up in callstacks.
virtual void CallDoWorkAndSignalTask(
const WorkCallback& work,
base::WaitableEvent* done,
SyncerError* error) = 0;
private:
content::BrowserThread::ID thread_;
ModelSafeGroup group_;
DISALLOW_COPY_AND_ASSIGN(BrowserThreadModelWorker);
};
// Subclass BrowserThreadModelWorker so that we can distinguish them
// from stack traces alone.
class DatabaseModelWorker : public BrowserThreadModelWorker {
public:
DatabaseModelWorker();
virtual ~DatabaseModelWorker();
protected:
virtual void CallDoWorkAndSignalTask(
const WorkCallback& work,
base::WaitableEvent* done,
SyncerError* error) OVERRIDE;
};
class FileModelWorker : public BrowserThreadModelWorker {
public:
FileModelWorker();
virtual ~FileModelWorker();
protected:
virtual void CallDoWorkAndSignalTask(
const WorkCallback& work,
base::WaitableEvent* done,
SyncerError* error) OVERRIDE;
};
} // namespace browser_sync
#endif // CHROME_BROWSER_SYNC_GLUE_BROWSER_THREAD_MODEL_WORKER_H_
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