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// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_WTF_SEQUENCE_BOUND_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_WTF_SEQUENCE_BOUND_H_
#include "base/functional/bind.h"
#include "base/task/sequenced_task_runner.h"
#include "base/threading/sequence_bound.h"
#include "third_party/blink/renderer/platform/wtf/cross_thread_functional.h"
#include "third_party/blink/renderer/platform/wtf/functional.h"
namespace WTF {
namespace internal {
template <typename T>
struct IsCrossThreadOnceFunctionImpl : std::false_type {};
template <typename R, typename... Args>
struct IsCrossThreadOnceFunctionImpl<CrossThreadOnceFunction<R(Args...)>>
: std::true_type {};
template <typename T>
using IsCrossThreadOnceFunction =
IsCrossThreadOnceFunctionImpl<std::decay_t<T>>;
struct SequenceBoundBindTraits {
template <typename Signature>
using CrossThreadTask = WTF::CrossThreadOnceFunction<Signature>;
template <typename Functor, typename... Args>
static inline auto BindOnce(Functor&& functor, Args&&... args) {
return CrossThreadBindOnce(std::forward<Functor>(functor),
std::forward<Args>(args)...);
}
template <typename T>
static inline auto Unretained(T ptr) {
return CrossThreadUnretained(ptr);
}
template <typename Signature>
static inline bool PostTask(base::SequencedTaskRunner& task_runner,
const base::Location& location,
CrossThreadTask<Signature>&& task) {
return task_runner.PostDelayedTask(
location, ConvertToBaseOnceCallback(std::move(task)),
base::TimeDelta());
}
static inline bool PostTaskAndReply(base::SequencedTaskRunner& task_runner,
const base::Location& location,
CrossThreadOnceClosure&& task,
CrossThreadOnceClosure&& reply) {
return task_runner.PostTaskAndReply(
location, ConvertToBaseOnceCallback(std::move(task)),
ConvertToBaseOnceCallback(std::move(reply)));
}
template <typename TaskReturnType, typename ReplyArgType>
static inline bool PostTaskAndReplyWithResult(
base::SequencedTaskRunner& task_runner,
const base::Location& location,
CrossThreadOnceFunction<TaskReturnType()>&& task,
CrossThreadOnceFunction<void(ReplyArgType)>&& reply) {
return task_runner.PostTaskAndReplyWithResult(
location, ConvertToBaseOnceCallback(std::move(task)),
ConvertToBaseOnceCallback(std::move(reply)));
}
template <template <typename> class CallbackType>
static constexpr bool IsCrossThreadTask =
IsCrossThreadOnceFunction<CallbackType<void()>>::value;
};
} // namespace internal
template <typename T>
using SequenceBound =
base::SequenceBound<T, WTF::internal::SequenceBoundBindTraits>;
} // namespace WTF
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_WTF_SEQUENCE_BOUND_H_
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