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Atmosphere/stratosphere/libstratosphere/source/os/os_system_event.cpp

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/*
* 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"
namespace ams::os {
SystemEvent::SystemEvent(bool inter_process, bool autoclear) : state(SystemEventState::Uninitialized) {
if (inter_process) {
R_ASSERT(this->InitializeAsInterProcessEvent(autoclear));
} else {
R_ASSERT(this->InitializeAsEvent(autoclear));
}
}
SystemEvent::SystemEvent(Handle read_handle, bool manage_read_handle, Handle write_handle, bool manage_write_handle, bool autoclear) : state(SystemEventState::Uninitialized) {
this->AttachHandles(read_handle, manage_read_handle, write_handle, manage_write_handle, autoclear);
}
SystemEvent::~SystemEvent() {
this->Finalize();
}
Event &SystemEvent::GetEvent() {
AMS_ASSERT(this->state == SystemEventState::Event);
return GetReference(this->storage_for_event);
}
const Event &SystemEvent::GetEvent() const {
AMS_ASSERT(this->state == SystemEventState::Event);
return GetReference(this->storage_for_event);
}
impl::InterProcessEvent &SystemEvent::GetInterProcessEvent() {
AMS_ASSERT(this->state == SystemEventState::InterProcessEvent);
return GetReference(this->storage_for_inter_process_event);
}
const impl::InterProcessEvent &SystemEvent::GetInterProcessEvent() const {
AMS_ASSERT(this->state == SystemEventState::InterProcessEvent);
return GetReference(this->storage_for_inter_process_event);
}
Result SystemEvent::InitializeAsEvent(bool autoclear) {
AMS_ASSERT(this->state == SystemEventState::Uninitialized);
new (GetPointer(this->storage_for_event)) Event(autoclear);
this->state = SystemEventState::Event;
return ResultSuccess();
}
Result SystemEvent::InitializeAsInterProcessEvent(bool autoclear) {
AMS_ASSERT(this->state == SystemEventState::Uninitialized);
new (GetPointer(this->storage_for_inter_process_event)) impl::InterProcessEvent();
this->state = SystemEventState::InterProcessEvent;
/* Ensure we end up in a correct state if initialization fails. */
{
auto guard = SCOPE_GUARD { this->Finalize(); };
R_TRY(this->GetInterProcessEvent().Initialize(autoclear));
guard.Cancel();
}
return ResultSuccess();
}
void SystemEvent::AttachHandles(Handle read_handle, bool manage_read_handle, Handle write_handle, bool manage_write_handle, bool autoclear) {
AMS_ASSERT(this->state == SystemEventState::Uninitialized);
new (GetPointer(this->storage_for_inter_process_event)) impl::InterProcessEvent();
this->state = SystemEventState::InterProcessEvent;
this->GetInterProcessEvent().Initialize(read_handle, manage_read_handle, write_handle, manage_write_handle, autoclear);
}
void SystemEvent::AttachReadableHandle(Handle read_handle, bool manage_read_handle, bool autoclear) {
this->AttachHandles(read_handle, manage_read_handle, INVALID_HANDLE, false, autoclear);
}
void SystemEvent::AttachWritableHandle(Handle write_handle, bool manage_write_handle, bool autoclear) {
this->AttachHandles(INVALID_HANDLE, false, write_handle, manage_write_handle, autoclear);
}
Handle SystemEvent::DetachReadableHandle() {
AMS_ASSERT(this->state == SystemEventState::InterProcessEvent);
return this->GetInterProcessEvent().DetachReadableHandle();
}
Handle SystemEvent::DetachWritableHandle() {
AMS_ASSERT(this->state == SystemEventState::InterProcessEvent);
return this->GetInterProcessEvent().DetachWritableHandle();
}
Handle SystemEvent::GetReadableHandle() const {
AMS_ASSERT(this->state == SystemEventState::InterProcessEvent);
return this->GetInterProcessEvent().GetReadableHandle();
}
Handle SystemEvent::GetWritableHandle() const {
AMS_ASSERT(this->state == SystemEventState::InterProcessEvent);
return this->GetInterProcessEvent().GetWritableHandle();
}
void SystemEvent::Finalize() {
switch (this->state) {
case SystemEventState::Uninitialized:
break;
case SystemEventState::Event:
this->GetEvent().~Event();
break;
case SystemEventState::InterProcessEvent:
this->GetInterProcessEvent().~InterProcessEvent();
break;
AMS_UNREACHABLE_DEFAULT_CASE();
}
this->state = SystemEventState::Uninitialized;
}
void SystemEvent::Signal() {
switch (this->state) {
case SystemEventState::Event:
this->GetEvent().Signal();
break;
case SystemEventState::InterProcessEvent:
this->GetInterProcessEvent().Signal();
break;
case SystemEventState::Uninitialized:
AMS_UNREACHABLE_DEFAULT_CASE();
}
}
void SystemEvent::Reset() {
switch (this->state) {
case SystemEventState::Event:
this->GetEvent().Reset();
break;
case SystemEventState::InterProcessEvent:
this->GetInterProcessEvent().Reset();
break;
case SystemEventState::Uninitialized:
AMS_UNREACHABLE_DEFAULT_CASE();
}
}
void SystemEvent::Wait() {
switch (this->state) {
case SystemEventState::Event:
this->GetEvent().Wait();
break;
case SystemEventState::InterProcessEvent:
this->GetInterProcessEvent().Wait();
break;
case SystemEventState::Uninitialized:
AMS_UNREACHABLE_DEFAULT_CASE();
}
}
bool SystemEvent::TryWait() {
switch (this->state) {
case SystemEventState::Event:
return this->GetEvent().TryWait();
case SystemEventState::InterProcessEvent:
return this->GetInterProcessEvent().TryWait();
case SystemEventState::Uninitialized:
AMS_UNREACHABLE_DEFAULT_CASE();
}
}
bool SystemEvent::TimedWait(u64 ns) {
switch (this->state) {
case SystemEventState::Event:
return this->GetEvent().TimedWait(ns);
case SystemEventState::InterProcessEvent:
return this->GetInterProcessEvent().TimedWait(ns);
case SystemEventState::Uninitialized:
AMS_UNREACHABLE_DEFAULT_CASE();
}
}
}