Atmosphere/stratosphere/libstratosphere/source/os/os_waitable_holder.cpp
Michael Scire 609a302e16 os: implement waitable management.
This implements waitable management for Events (and
implements Events). It also refactors PM to use new
Event/Waitable semantics, and also adds STS_ASSERT
as a macro for asserting a boolean expression. The
rest of stratosphere has been refactored to use
STS_ASSERT whenever possible.
2019-12-07 12:41:28 -08:00

111 lines
3.9 KiB
C++

/*
* Copyright (c) 2018-2019 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_holder_impl.hpp"
#include "impl/os_waitable_manager_impl.hpp"
namespace sts::os {
WaitableHolder::WaitableHolder(Handle handle) {
/* Don't allow invalid handles. */
STS_ASSERT(handle != INVALID_HANDLE);
/* Initialize appropriate holder. */
new (GetPointer(this->impl_storage)) impl::WaitableHolderOfHandle(handle);
/* Set user-data. */
this->user_data = 0;
}
WaitableHolder::WaitableHolder(Event *event) {
/* Initialize appropriate holder. */
new (GetPointer(this->impl_storage)) impl::WaitableHolderOfEvent(event);
/* Set user-data. */
this->user_data = 0;
}
WaitableHolder::WaitableHolder(SystemEvent *event) {
/* Initialize appropriate holder. */
switch (event->GetState()) {
case SystemEventState::Event:
new (GetPointer(this->impl_storage)) impl::WaitableHolderOfEvent(&event->GetEvent());
break;
case SystemEventState::InterProcessEvent:
new (GetPointer(this->impl_storage)) impl::WaitableHolderOfInterProcessEvent(&event->GetInterProcessEvent());
break;
case SystemEventState::Uninitialized:
default:
std::abort();
}
/* Set user-data. */
this->user_data = 0;
}
WaitableHolder::WaitableHolder(InterruptEvent *event) {
/* Initialize appropriate holder. */
new (GetPointer(this->impl_storage)) impl::WaitableHolderOfInterruptEvent(event);
/* Set user-data. */
this->user_data = 0;
}
WaitableHolder::WaitableHolder(Thread *thread) {
/* Initialize appropriate holder. */
new (GetPointer(this->impl_storage)) impl::WaitableHolderOfThread(thread);
/* Set user-data. */
this->user_data = 0;
}
WaitableHolder::WaitableHolder(MessageQueue *message_queue, MessageQueueWaitKind wait_kind) {
/* Initialize appropriate holder. */
switch (wait_kind) {
case MessageQueueWaitKind::ForNotFull:
new (GetPointer(this->impl_storage)) impl::WaitableHolderOfMessageQueueForNotFull(message_queue);
break;
case MessageQueueWaitKind::ForNotEmpty:
new (GetPointer(this->impl_storage)) impl::WaitableHolderOfMessageQueueForNotEmpty(message_queue);
break;
default:
std::abort();
}
/* Set user-data. */
this->user_data = 0;
}
WaitableHolder::~WaitableHolder() {
auto holder_base = reinterpret_cast<impl::WaitableHolderBase *>(GetPointer(this->impl_storage));
/* Don't allow destruction of a linked waitable holder. */
STS_ASSERT(!holder_base->IsLinkedToManager());
holder_base->~WaitableHolderBase();
}
void WaitableHolder::UnlinkFromWaitableManager() {
auto holder_base = reinterpret_cast<impl::WaitableHolderBase *>(GetPointer(this->impl_storage));
/* Don't allow unlinking of an unlinked holder. */
STS_ASSERT(holder_base->IsLinkedToManager());
holder_base->GetManager()->UnlinkWaitableHolder(*holder_base);
holder_base->SetManager(nullptr);
}
}