Atmosphere/libraries/libstratosphere/source/os/os_waitable.cpp

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2020-04-08 09:21:35 +00:00
/*
* 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/>.
*/
#include <stratosphere.hpp>
#include "impl/os_waitable_manager_impl.hpp"
#include "impl/os_waitable_holder_base.hpp"
#include "impl/os_waitable_holder_impl.hpp"
namespace ams::os {
namespace {
ALWAYS_INLINE impl::WaitableManagerImpl &GetWaitableManagerImpl(WaitableManagerType *manager) {
return GetReference(manager->impl_storage);
}
ALWAYS_INLINE WaitableHolderType *ReinterpretAsWaitableHolder(impl::WaitableHolderBase *base) {
return reinterpret_cast<WaitableHolderType *>(base);
}
}
void InitializeWaitableManager(WaitableManagerType *manager) {
/* Initialize storage. */
new (std::addressof(GetWaitableManagerImpl(manager))) impl::WaitableManagerImpl;
/* Mark initialized. */
manager->state = WaitableManagerType::State_Initialized;
}
void FinalizeWaitableManager(WaitableManagerType *manager) {
auto &impl = GetWaitableManagerImpl(manager);
AMS_ASSERT(manager->state == WaitableManagerType::State_Initialized);
AMS_ASSERT(impl.IsEmpty());
/* Mark not initialized. */
manager->state = WaitableManagerType::State_NotInitialized;
/* Destroy. */
impl.~WaitableManagerImpl();
}
WaitableHolderType *WaitAny(WaitableManagerType *manager) {
auto &impl = GetWaitableManagerImpl(manager);
AMS_ASSERT(manager->state == WaitableManagerType::State_Initialized);
AMS_ASSERT(!impl.IsEmpty());
auto *holder = ReinterpretAsWaitableHolder(impl.WaitAny());
AMS_ASSERT(holder != nullptr);
return holder;
}
WaitableHolderType *TryWaitAny(WaitableManagerType *manager) {
auto &impl = GetWaitableManagerImpl(manager);
AMS_ASSERT(manager->state == WaitableManagerType::State_Initialized);
AMS_ASSERT(!impl.IsEmpty());
auto *holder = ReinterpretAsWaitableHolder(impl.TryWaitAny());
return holder;
}
WaitableHolderType *TimedWaitAny(WaitableManagerType *manager, TimeSpan timeout) {
auto &impl = GetWaitableManagerImpl(manager);
AMS_ASSERT(manager->state == WaitableManagerType::State_Initialized);
AMS_ASSERT(!impl.IsEmpty());
AMS_ASSERT(timeout.GetNanoSeconds() >= 0);
auto *holder = ReinterpretAsWaitableHolder(impl.TimedWaitAny(timeout));
return holder;
}
void FinalizeWaitableHolder(WaitableHolderType *holder) {
auto *holder_base = reinterpret_cast<impl::WaitableHolderBase *>(GetPointer(holder->impl_storage));
AMS_ASSERT(!holder_base->IsLinkedToManager());
holder_base->~WaitableHolderBase();
}
void LinkWaitableHolder(WaitableManagerType *manager, WaitableHolderType *holder) {
auto &impl = GetWaitableManagerImpl(manager);
auto *holder_base = reinterpret_cast<impl::WaitableHolderBase *>(GetPointer(holder->impl_storage));
AMS_ASSERT(manager->state == WaitableManagerType::State_Initialized);
AMS_ASSERT(!holder_base->IsLinkedToManager());
impl.LinkWaitableHolder(*holder_base);
holder_base->SetManager(&impl);
}
void UnlinkWaitableHolder(WaitableHolderType *holder) {
auto *holder_base = reinterpret_cast<impl::WaitableHolderBase *>(GetPointer(holder->impl_storage));
/* Don't allow unlinking of an unlinked holder. */
AMS_ABORT_UNLESS(holder_base->IsLinkedToManager());
holder_base->GetManager()->UnlinkWaitableHolder(*holder_base);
holder_base->SetManager(nullptr);
}
void UnlinkAllWaitableHolder(WaitableManagerType *manager) {
auto &impl = GetWaitableManagerImpl(manager);
AMS_ASSERT(manager->state == WaitableManagerType::State_Initialized);
return impl.UnlinkAll();
}
void MoveAllWaitableHolder(WaitableManagerType *_dst, WaitableManagerType *_src) {
auto &dst = GetWaitableManagerImpl(_dst);
auto &src = GetWaitableManagerImpl(_src);
AMS_ASSERT(_dst->state == WaitableManagerType::State_Initialized);
AMS_ASSERT(_src->state == WaitableManagerType::State_Initialized);
return dst.MoveAllFrom(src);
}
void SetWaitableHolderUserData(WaitableHolderType *holder, uintptr_t user_data) {
holder->user_data = user_data;
}
uintptr_t GetWaitableHolderUserData(const WaitableHolderType *holder) {
return holder->user_data;
}
void InitializeWaitableHolder(WaitableHolderType *holder, Handle handle) {
AMS_ASSERT(handle != svc::InvalidHandle);
new (GetPointer(holder->impl_storage)) impl::WaitableHolderOfHandle(handle);
holder->user_data = 0;
}
}