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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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
#ifndef DOM_QUOTA_MOZPROMISEUTILS_H_
#define DOM_QUOTA_MOZPROMISEUTILS_H_
#include "mozilla/MozPromise.h"
#include "nsThreadUtils.h"
namespace mozilla::dom::quota {
namespace detail {
template <typename T>
struct IsExclusiveMozPromise {
static constexpr bool value = false;
};
// Specialization for MozPromise
template <typename ResolveValueT, typename RejectValueT, bool IsExclusive>
struct IsExclusiveMozPromise<
MozPromise<ResolveValueT, RejectValueT, IsExclusive>> {
static constexpr bool value = IsExclusive;
};
} // namespace detail
template <typename T, typename U, typename F>
auto Map(RefPtr<U> aPromise, F&& aFunc)
-> std::enable_if_t<
detail::IsExclusiveMozPromise<RemoveSmartPointer<U>>::value,
RefPtr<T>> {
return aPromise->Then(
GetCurrentSerialEventTarget(), __func__,
[func =
std::forward<F>(aFunc)](typename U::ResolveOrRejectValue&& aValue) {
if (aValue.IsReject()) {
return T::CreateAndReject(aValue.RejectValue(), __func__);
}
auto value = func(std::move(aValue));
return T::CreateAndResolve(value, __func__);
});
}
template <typename T, typename U, typename F>
auto Map(RefPtr<U> aPromise, F&& aFunc)
-> std::enable_if_t<
!detail::IsExclusiveMozPromise<RemoveSmartPointer<U>>::value,
RefPtr<T>> {
return aPromise->Then(GetCurrentSerialEventTarget(), __func__,
[func = std::forward<F>(aFunc)](
const typename U::ResolveOrRejectValue& aValue) {
if (aValue.IsReject()) {
return T::CreateAndReject(aValue.RejectValue(),
__func__);
}
auto value = func(aValue);
return T::CreateAndResolve(value, __func__);
});
}
} // namespace mozilla::dom::quota
#endif // DOM_QUOTA_MOZPROMISEUTILS_H_