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// Copyright 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.
#include "components/sync_driver/glue/browser_thread_model_worker.h"
#include "base/bind.h"
#include "base/single_thread_task_runner.h"
#include "base/synchronization/waitable_event.h"
using base::SingleThreadTaskRunner;
using base::WaitableEvent;
namespace browser_sync {
BrowserThreadModelWorker::BrowserThreadModelWorker(
const scoped_refptr<SingleThreadTaskRunner>& runner,
syncer::ModelSafeGroup group,
syncer::WorkerLoopDestructionObserver* observer)
: ModelSafeWorker(observer), runner_(runner), group_(group) {}
syncer::SyncerError BrowserThreadModelWorker::DoWorkAndWaitUntilDoneImpl(
const syncer::WorkCallback& work) {
syncer::SyncerError error = syncer::UNSET;
if (runner_->BelongsToCurrentThread()) {
DLOG(WARNING) << "Already on thread " << runner_;
return work.Run();
}
if (!runner_->PostTask(
FROM_HERE,
base::Bind(&BrowserThreadModelWorker::CallDoWorkAndSignalTask, this,
work, work_done_or_stopped(), &error))) {
DLOG(WARNING) << "Failed to post task to runner " << runner_;
error = syncer::CANNOT_DO_WORK;
return error;
}
work_done_or_stopped()->Wait();
return error;
}
syncer::ModelSafeGroup BrowserThreadModelWorker::GetModelSafeGroup() {
return group_;
}
BrowserThreadModelWorker::~BrowserThreadModelWorker() {}
void BrowserThreadModelWorker::RegisterForLoopDestruction() {
if (runner_->BelongsToCurrentThread()) {
SetWorkingLoopToCurrent();
} else {
runner_->PostTask(
FROM_HERE,
Bind(&BrowserThreadModelWorker::RegisterForLoopDestruction, this));
}
}
void BrowserThreadModelWorker::CallDoWorkAndSignalTask(
const syncer::WorkCallback& work,
WaitableEvent* done,
syncer::SyncerError* error) {
DCHECK(runner_->BelongsToCurrentThread());
if (!IsStopped())
*error = work.Run();
done->Signal();
}
} // namespace browser_sync
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