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base / task / post_task_and_reply_with_result_internal.h [blame]
// 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.
#ifndef BASE_TASK_POST_TASK_AND_REPLY_WITH_RESULT_INTERNAL_H_
#define BASE_TASK_POST_TASK_AND_REPLY_WITH_RESULT_INTERNAL_H_
#include <memory>
#include <utility>
#include "base/check.h"
#include "base/functional/callback.h"
namespace base {
namespace internal {
// Adapts a function that produces a result via a return value to
// one that returns via an output parameter.
template <typename ReturnType>
void ReturnAsParamAdapter(OnceCallback<ReturnType()> func,
std::unique_ptr<ReturnType>* result) {
result->reset(new ReturnType(std::move(func).Run()));
}
// Adapts a T* result to a callblack that expects a T.
template <typename TaskReturnType, typename ReplyArgType>
void ReplyAdapter(OnceCallback<void(ReplyArgType)> callback,
std::unique_ptr<TaskReturnType>* result) {
DCHECK(result->get());
std::move(callback).Run(std::move(**result));
}
} // namespace internal
} // namespace base
#endif // BASE_TASK_POST_TASK_AND_REPLY_WITH_RESULT_INTERNAL_H_