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Atmosphere/libraries/libstratosphere/include/stratosphere/sf/sf_out.hpp

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/*
* Copyright (c) 2018-2020 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include "sf_common.hpp"
#include "cmif/sf_cmif_pointer_and_size.hpp"
namespace ams::sf {
namespace impl {
struct OutBaseTag{};
}
template<typename>
struct IsOutForceEnabled : public std::false_type{};
template<>
struct IsOutForceEnabled<::ams::Result> : public std::true_type{};
template<typename T>
using IsOutEnabled = typename std::enable_if<std::is_trivial<T>::value || IsOutForceEnabled<T>::value>::type;
template<typename T, typename = IsOutEnabled<T>>
class Out : public impl::OutBaseTag {
public:
static constexpr size_t TypeSize = sizeof(T);
private:
T *ptr;
public:
constexpr Out(uintptr_t p) : ptr(reinterpret_cast<T *>(p)) { /* ... */ }
constexpr Out(T *p) : ptr(p) { /* ... */ }
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constexpr Out(const cmif::PointerAndSize &pas) : ptr(reinterpret_cast<T *>(pas.GetAddress())) { /* TODO: Is AMS_ABORT_UNLESS(pas.GetSize() >= sizeof(T)); necessary? */ }
void SetValue(const T& value) const {
*this->ptr = value;
}
const T &GetValue() const {
return *this->ptr;
}
T *GetPointer() const {
return this->ptr;
}
/* Convenience operators. */
T &operator*() const {
return *this->ptr;
}
T *operator->() const {
return this->ptr;
}
};
template<typename T>
class Out<T *> {
static_assert(!std::is_same<T, T>::value, "Invalid sf::Out<T> (Raw Pointer)");
};
}