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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_
#include "base/basictypes.h"
#include "base/callback_forward.h"
#include "base/compiler_specific.h"
#include "content/public/browser/browser_thread.h"
#include "sync/internal_api/public/engine/model_safe_worker.h"
#include "sync/internal_api/public/util/syncer_error.h"
namespace base {
class WaitableEvent;
}
namespace browser_sync {
// A syncer::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 syncer::ModelSafeWorker {
public:
BrowserThreadModelWorker(content::BrowserThread::ID thread,
syncer::ModelSafeGroup group,
syncer::WorkerLoopDestructionObserver* observer);
// syncer::ModelSafeWorker implementation. Called on the sync thread.
void RegisterForLoopDestruction() override;
syncer::ModelSafeGroup GetModelSafeGroup() override;
protected:
~BrowserThreadModelWorker() override;
syncer::SyncerError DoWorkAndWaitUntilDoneImpl(
const syncer::WorkCallback& work) override;
// 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 syncer::WorkCallback& work,
base::WaitableEvent* done,
syncer::SyncerError* error) = 0;
private:
content::BrowserThread::ID thread_;
syncer::ModelSafeGroup group_;
DISALLOW_COPY_AND_ASSIGN(BrowserThreadModelWorker);
};
// Subclass BrowserThreadModelWorker so that we can distinguish them
// from stack traces alone.
class DatabaseModelWorker : public BrowserThreadModelWorker {
public:
explicit DatabaseModelWorker(syncer::WorkerLoopDestructionObserver* observer);
protected:
void CallDoWorkAndSignalTask(const syncer::WorkCallback& work,
base::WaitableEvent* done,
syncer::SyncerError* error) override;
private:
~DatabaseModelWorker() override;
};
class FileModelWorker : public BrowserThreadModelWorker {
public:
explicit FileModelWorker(syncer::WorkerLoopDestructionObserver* observer);
protected:
void CallDoWorkAndSignalTask(const syncer::WorkCallback& work,
base::WaitableEvent* done,
syncer::SyncerError* error) override;
private:
~FileModelWorker() override;
};
} // namespace browser_sync
#endif // CHROME_BROWSER_SYNC_GLUE_BROWSER_THREAD_MODEL_WORKER_H_
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