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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef REMOTING_BASE_AUTO_THREAD_TASK_RUNNER_H_
#define REMOTING_BASE_AUTO_THREAD_TASK_RUNNER_H_
#include "base/functional/callback.h"
#include "base/task/single_thread_task_runner.h"
#include "build/buildflag.h"
namespace remoting {
// A wrapper around |SingleThreadTaskRunner| that provides automatic lifetime
// management, by posting a caller-supplied task to the underlying task runner
// when no more references remain.
class AutoThreadTaskRunner : public base::SingleThreadTaskRunner {
public:
#if BUILDFLAG(IS_CHROMEOS)
// Constructs an instance of |AutoThreadTaskRunner| wrapping |task_runner|.
// This c'tor should be used when the underlying thread is not owned, such as
// when this instance is running on a browser thread on ChromeOS.
explicit AutoThreadTaskRunner(
scoped_refptr<base::SingleThreadTaskRunner> task_runner);
#endif
// Constructs an instance of |AutoThreadTaskRunner| wrapping |task_runner|.
// |stop_task| is posted to |task_runner| when the last reference to
// the AutoThreadTaskRunner is dropped.
AutoThreadTaskRunner(scoped_refptr<base::SingleThreadTaskRunner> task_runner,
base::OnceClosure stop_task);
AutoThreadTaskRunner(const AutoThreadTaskRunner&) = delete;
AutoThreadTaskRunner& operator=(const AutoThreadTaskRunner&) = delete;
// SingleThreadTaskRunner implementation
bool PostDelayedTask(const base::Location& from_here,
base::OnceClosure task,
base::TimeDelta delay) override;
bool PostNonNestableDelayedTask(const base::Location& from_here,
base::OnceClosure task,
base::TimeDelta delay) override;
bool RunsTasksInCurrentSequence() const override;
const scoped_refptr<base::SingleThreadTaskRunner>& task_runner() {
return task_runner_;
}
private:
~AutoThreadTaskRunner() override;
// Task posted to |task_runner_| to notify the caller that it may be stopped.
base::OnceClosure stop_task_;
// The wrapped task runner.
scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
};
} // namespace remoting
#endif // REMOTING_BASE_AUTO_THREAD_TASK_RUNNER_H_
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