Atmosphere/libraries/libstratosphere/source/htc/server/htc_htcmisc_impl.cpp

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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/>.
*/
#include <stratosphere.hpp>
#include "htc_htcmisc_impl.hpp"
namespace ams::htc::server {
namespace {
alignas(os::ThreadStackAlignment) u8 g_client_thread_stack[os::MemoryPageSize];
alignas(os::ThreadStackAlignment) u8 g_server_thread_stack[os::MemoryPageSize];
}
HtcmiscImpl::HtcmiscImpl(htclow::HtclowManager *htclow_manager)
: m_htclow_driver(htclow_manager, htclow::ModuleId::Htcmisc),
m_driver_manager(std::addressof(m_htclow_driver)),
m_rpc_client(std::addressof(m_htclow_driver), HtcmiscClientChannelId),
m_rpc_server(std::addressof(m_htclow_driver), HtcmiscServerChannelId),
m_cancel_event(os::EventClearMode_ManualClear),
m_cancelled(false),
m_connection_event(os::EventClearMode_ManualClear),
m_client_connected(false),
m_server_connected(false),
m_connected(false),
m_connection_mutex()
{
/* Create the client thread. */
R_ABORT_UNLESS(os::CreateThread(std::addressof(m_client_thread), ClientThreadEntry, this, g_client_thread_stack, sizeof(g_client_thread_stack), AMS_GET_SYSTEM_THREAD_PRIORITY(htc, Htcmisc)));
/* Set the client thread name. */
os::SetThreadNamePointer(std::addressof(m_client_thread), AMS_GET_SYSTEM_THREAD_NAME(htc, Htcmisc));
/* Start the client thread. */
os::StartThread(std::addressof(m_client_thread));
/* Create the server thread. */
R_ABORT_UNLESS(os::CreateThread(std::addressof(m_server_thread), ServerThreadEntry, this, g_server_thread_stack, sizeof(g_server_thread_stack), AMS_GET_SYSTEM_THREAD_PRIORITY(htc, Htcmisc)));
/* Set the server thread name. */
os::SetThreadNamePointer(std::addressof(m_server_thread), AMS_GET_SYSTEM_THREAD_NAME(htc, Htcmisc));
/* Start the server thread. */
os::StartThread(std::addressof(m_server_thread));
}
HtcmiscImpl::~HtcmiscImpl() {
/* Cancel ourselves. */
this->Cancel();
/* Wait for our threads to be done, and destroy them. */
os::WaitThread(std::addressof(m_client_thread));
os::DestroyThread(std::addressof(m_client_thread));
os::WaitThread(std::addressof(m_server_thread));
os::DestroyThread(std::addressof(m_server_thread));
}
void HtcmiscImpl::Cancel() {
/* Set ourselves as cancelled. */
m_cancelled = true;
/* Signal our cancel event. */
m_cancel_event.Signal();
}
void HtcmiscImpl::ClientThread() {
/* Loop so long as we're not cancelled. */
while (!m_cancelled) {
/* Open the rpc client. */
m_rpc_client.Open();
/* Ensure we close, if something goes wrong. */
auto client_guard = SCOPE_GUARD { m_rpc_client.Close(); };
/* Wait for the rpc client. */
if (m_rpc_client.WaitAny(htclow::ChannelState_Connectable, m_cancel_event.GetBase()) != 0) {
break;
}
/* Start the rpc client. */
if (R_FAILED(m_rpc_client.Start())) {
break;
}
/* We're connected! */
this->SetClientConnectionEvent(true);
client_guard.Cancel();
/* We're connected, so we want to cleanup when we're done. */
ON_SCOPE_EXIT {
m_rpc_client.Close();
m_rpc_client.Cancel();
m_rpc_client.Wait();
this->SetClientConnectionEvent(false);
};
/* Wait to become disconnected. */
if (m_rpc_client.WaitAny(htclow::ChannelState_Disconnected, m_cancel_event.GetBase()) != 0) {
break;
}
}
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}
void HtcmiscImpl::ServerThread() {
/* Loop so long as we're not cancelled. */
while (!m_cancelled) {
/* Open the rpc server. */
m_rpc_server.Open();
/* Ensure we close, if something goes wrong. */
auto server_guard = SCOPE_GUARD { m_rpc_server.Close(); };
/* Wait for the rpc server. */
if (m_rpc_server.WaitAny(htclow::ChannelState_Connectable, m_cancel_event.GetBase()) != 0) {
break;
}
/* Start the rpc server. */
if (R_FAILED(m_rpc_server.Start())) {
break;
}
/* We're connected! */
this->SetServerConnectionEvent(true);
server_guard.Cancel();
/* We're connected, so we want to cleanup when we're done. */
ON_SCOPE_EXIT {
m_rpc_server.Close();
m_rpc_server.Cancel();
m_rpc_server.Wait();
this->SetServerConnectionEvent(false);
};
/* Wait to become disconnected. */
if (m_rpc_server.WaitAny(htclow::ChannelState_Disconnected, m_cancel_event.GetBase()) != 0) {
break;
}
}
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}
void HtcmiscImpl::SetClientConnectionEvent(bool en) {
/* Lock ourselves. */
std::scoped_lock lk(m_connection_mutex);
/* Update our state. */
if (m_client_connected != en) {
m_client_connected = en;
this->UpdateConnectionEvent();
}
}
void HtcmiscImpl::SetServerConnectionEvent(bool en) {
/* Lock ourselves. */
std::scoped_lock lk(m_connection_mutex);
/* Update our state. */
if (m_server_connected != en) {
m_server_connected = en;
this->UpdateConnectionEvent();
}
}
void HtcmiscImpl::UpdateConnectionEvent() {
/* Determine if we're connected. */
const bool connected = m_client_connected && m_server_connected;
/* Update our state. */
if (m_connected != connected) {
m_connected = connected;
m_connection_event.Signal();
}
}
os::EventType *HtcmiscImpl::GetConnectionEvent() const {
return m_connection_event.GetBase();
}
bool HtcmiscImpl::IsConnected() const {
/* Lock ourselves. */
std::scoped_lock lk(m_connection_mutex);
return m_connected;
}
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}