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// Copyright 2019 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 PLATFORM_API_SCOPED_WAKE_LOCK_H_
#define PLATFORM_API_SCOPED_WAKE_LOCK_H_
#include <memory>
#include "platform/api/serial_delete_ptr.h"
#include "platform/api/task_runner.h"
namespace openscreen {
// Ensures that the device does not got to sleep. This is used, for example,
// while Open Screen is communicating with peers over the network for things
// like media streaming.
//
// The wake lock is RAII: It is automatically engaged when the ScopedWakeLock is
// created and released when the ScopedWakeLock is destroyed. Open Screen code
// may sometimes create multiple instances. In that case, the wake lock should
// be engaged upon creating the first instance, and then held until all
// instances have been destroyed.
class ScopedWakeLock {
public:
static SerialDeletePtr<ScopedWakeLock> Create(TaskRunner* task_runner);
// Instances are not copied nor moved.
ScopedWakeLock(const ScopedWakeLock&) = delete;
ScopedWakeLock(ScopedWakeLock&&) = delete;
ScopedWakeLock& operator=(const ScopedWakeLock&) = delete;
ScopedWakeLock& operator=(ScopedWakeLock&&) = delete;
ScopedWakeLock();
virtual ~ScopedWakeLock();
};
} // namespace openscreen
#endif // PLATFORM_API_SCOPED_WAKE_LOCK_H_
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