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// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "remoting/base/queued_task_poster.h"
#include "base/check.h"
#include "base/functional/bind.h"
#include "base/location.h"
#include "base/task/single_thread_task_runner.h"
namespace remoting {
QueuedTaskPoster::QueuedTaskPoster(
scoped_refptr<base::SingleThreadTaskRunner> target_task_runner)
: target_task_runner_(target_task_runner) {}
QueuedTaskPoster::~QueuedTaskPoster() {
if (source_task_runner_) {
DCHECK(source_task_runner_->BelongsToCurrentThread());
}
}
void QueuedTaskPoster::AddTask(base::OnceClosure closure) {
if (!source_task_runner_) {
source_task_runner_ = base::SingleThreadTaskRunner::GetCurrentDefault();
}
DCHECK(source_task_runner_->BelongsToCurrentThread());
task_queue_.emplace(std::move(closure));
if (!transfer_task_scheduled_) {
source_task_runner_->PostTask(
FROM_HERE, base::BindOnce(&QueuedTaskPoster::TransferTaskQueue,
weak_factory_.GetWeakPtr()));
transfer_task_scheduled_ = true;
}
}
static void ConsumeTaskQueue(base::queue<base::OnceClosure>* queue) {
while (!queue->empty()) {
std::move(queue->front()).Run();
queue->pop();
}
}
void QueuedTaskPoster::TransferTaskQueue() {
DCHECK(transfer_task_scheduled_);
transfer_task_scheduled_ = false;
base::queue<base::OnceClosure>* queue_to_transfer =
new base::queue<base::OnceClosure>();
queue_to_transfer->swap(task_queue_);
target_task_runner_->PostTask(
FROM_HERE,
base::BindOnce(&ConsumeTaskQueue, base::Owned(queue_to_transfer)));
}
} // namespace remoting
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