Atmosphere/libraries/libstratosphere/include/stratosphere/tipc/tipc_out.hpp
2021-10-10 00:14:06 -07:00

76 lines
2.3 KiB
C++

/*
* Copyright (c) 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 <stratosphere/tipc/tipc_common.hpp>
#include <stratosphere/tipc/tipc_pointer_and_size.hpp>
namespace ams::tipc {
namespace impl {
struct OutBaseTag{};
}
template<typename>
struct IsOutForceEnabled : public std::false_type{};
template<>
struct IsOutForceEnabled<::ams::Result> : public std::true_type{};
template<typename T>
concept OutEnabled = (std::is_trivial<T>::value || IsOutForceEnabled<T>::value) && !std::is_pointer<T>::value;
template<typename T>
class Out : public impl::OutBaseTag {
static_assert(OutEnabled<T>);
public:
static constexpr size_t TypeSize = sizeof(T);
private:
T *m_ptr;
public:
constexpr Out(uintptr_t p) : m_ptr(reinterpret_cast<T *>(p)) { /* ... */ }
constexpr Out(T *p) : m_ptr(p) { /* ... */ }
constexpr Out(const tipc::PointerAndSize &pas) : m_ptr(reinterpret_cast<T *>(pas.GetAddress())) { /* TODO: Is AMS_ABORT_UNLESS(pas.GetSize() >= sizeof(T)); necessary? */ }
ALWAYS_INLINE void SetValue(const T& value) const {
*m_ptr = value;
}
ALWAYS_INLINE const T &GetValue() const {
return *m_ptr;
}
ALWAYS_INLINE T *GetPointer() const {
return m_ptr;
}
/* Convenience operators. */
ALWAYS_INLINE T &operator*() const {
return *m_ptr;
}
ALWAYS_INLINE T *operator->() const {
return m_ptr;
}
};
template<typename T>
class Out<T *> {
static_assert(!std::is_same<T, T>::value, "Invalid tipc::Out<T> (Raw Pointer)");
};
}