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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set sw=2 ts=8 et ft=cpp : */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef mozilla_MediaTaskUtils_h
#define mozilla_MediaTaskUtils_h
#include "nsThreadUtils.h"
// The main reason this file is separate from MediaUtils.h
#include "base/task.h"
namespace mozilla {
namespace media {
/* media::NewTaskFrom() - Create a Task from a lambda.
*
* Similar to media::NewRunnableFrom() - Create an nsRunnable from a lambda,
* but ignore the return value from the lambda.
*
* Prefer NS_NewRunnableFunction(), which provides a specific name, unless the
* lambda really must have a non-void return value that is to be ignored.
*/
template <typename OnRunType>
class LambdaTask : public Runnable {
public:
explicit LambdaTask(OnRunType&& aOnRun)
: Runnable("media::LambdaTask"), mOnRun(std::move(aOnRun)) {}
private:
NS_IMETHOD
Run() override {
mOnRun();
return NS_OK;
}
OnRunType mOnRun;
};
template <typename OnRunType>
already_AddRefed<LambdaTask<OnRunType>> NewTaskFrom(OnRunType&& aOnRun) {
typedef LambdaTask<OnRunType> LambdaType;
RefPtr<LambdaType> lambda = new LambdaType(std::forward<OnRunType>(aOnRun));
return lambda.forget();
}
} // namespace media
} // namespace mozilla
#endif // mozilla_MediaTaskUtils_h
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