mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-12-05 04:28:04 +01:00
181 lines
6.8 KiB
C++
181 lines
6.8 KiB
C++
/*
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* Copyright (c) 2018-2020 Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <mesosphere.hpp>
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namespace ams::kern {
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void KLightServerSession::Destroy() {
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MESOSPHERE_ASSERT_THIS();
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this->CleanupRequests();
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m_parent->OnServerClosed();
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}
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void KLightServerSession::OnClientClosed() {
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MESOSPHERE_ASSERT_THIS();
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this->CleanupRequests();
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}
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Result KLightServerSession::OnRequest(KThread *request_thread) {
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MESOSPHERE_ASSERT_THIS();
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MESOSPHERE_ASSERT(KScheduler::IsSchedulerLockedByCurrentThread());
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/* Check that the server isn't closed. */
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R_UNLESS(!m_parent->IsServerClosed(), svc::ResultSessionClosed());
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/* Try to sleep the thread. */
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R_UNLESS(m_request_queue.SleepThread(request_thread), svc::ResultTerminationRequested());
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/* If we don't have a current request, wake up a server thread to handle it. */
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if (m_current_request == nullptr) {
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m_server_queue.WakeupFrontThread();
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}
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return ResultSuccess();
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}
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Result KLightServerSession::ReplyAndReceive(u32 *data) {
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MESOSPHERE_ASSERT_THIS();
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/* Set the server context. */
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KThread *server_thread = GetCurrentThreadPointer();
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server_thread->SetLightSessionData(data);
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/* Reply, if we need to. */
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KThread *cur_request = nullptr;
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if (data[0] & KLightSession::ReplyFlag) {
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KScopedSchedulerLock sl;
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/* Check that we're open. */
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R_UNLESS(!m_parent->IsClientClosed(), svc::ResultSessionClosed());
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R_UNLESS(!m_parent->IsServerClosed(), svc::ResultSessionClosed());
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/* Check that we have a request to reply to. */
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R_UNLESS(m_current_request != nullptr, svc::ResultInvalidState());
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/* Check that the server thread is correct. */
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R_UNLESS(m_server_thread == server_thread, svc::ResultInvalidState());
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/* If we can reply, do so. */
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if (!m_current_request->IsTerminationRequested()) {
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MESOSPHERE_ASSERT(m_current_request->GetState() == KThread::ThreadState_Waiting);
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MESOSPHERE_ASSERT(m_request_queue.begin() != m_request_queue.end() && m_current_request == std::addressof(*m_request_queue.begin()));
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std::memcpy(m_current_request->GetLightSessionData(), server_thread->GetLightSessionData(), KLightSession::DataSize);
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m_request_queue.WakeupThread(m_current_request);
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}
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/* Clear our current request. */
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cur_request = m_current_request;
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m_current_request = nullptr;
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m_server_thread = nullptr;
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}
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/* Close the current request, if we had one. */
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if (cur_request != nullptr) {
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cur_request->Close();
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}
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/* Receive. */
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bool set_cancellable = false;
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while (true) {
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KScopedSchedulerLock sl;
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/* Check that we aren't already receiving. */
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R_UNLESS(m_server_queue.IsEmpty(), svc::ResultInvalidState());
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R_UNLESS(m_server_thread == nullptr, svc::ResultInvalidState());
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/* If we cancelled in a previous loop, clear cancel state. */
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if (set_cancellable) {
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server_thread->ClearCancellable();
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set_cancellable = false;
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}
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/* Check that we're open. */
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R_UNLESS(!m_parent->IsClientClosed(), svc::ResultSessionClosed());
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R_UNLESS(!m_parent->IsServerClosed(), svc::ResultSessionClosed());
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/* If we have a request available, use it. */
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if (m_current_request == nullptr && !m_request_queue.IsEmpty()) {
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m_current_request = std::addressof(*m_request_queue.begin());
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m_current_request->Open();
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m_server_thread = server_thread;
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break;
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} else {
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/* Otherwise, wait for a request to come in. */
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R_UNLESS(m_server_queue.SleepThread(server_thread), svc::ResultTerminationRequested());
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/* Check if we were cancelled. */
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if (server_thread->IsWaitCancelled()) {
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m_server_queue.WakeupThread(server_thread);
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server_thread->ClearWaitCancelled();
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return svc::ResultCancelled();
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}
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/* Otherwise, mark as cancellable. */
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server_thread->SetCancellable();
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set_cancellable = true;
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}
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}
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/* Copy the client data. */
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std::memcpy(server_thread->GetLightSessionData(), m_current_request->GetLightSessionData(), KLightSession::DataSize);
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return ResultSuccess();
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}
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void KLightServerSession::CleanupRequests() {
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/* Cleanup all pending requests. */
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KThread *cur_request = nullptr;
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{
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KScopedSchedulerLock sl;
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/* Handle the current request. */
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if (m_current_request != nullptr) {
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/* Reply to the current request. */
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if (!m_current_request->IsTerminationRequested()) {
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MESOSPHERE_ASSERT(m_current_request->GetState() == KThread::ThreadState_Waiting);
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MESOSPHERE_ASSERT(m_request_queue.begin() != m_request_queue.end() && m_current_request == std::addressof(*m_request_queue.begin()));
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m_request_queue.WakeupThread(m_current_request);
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m_current_request->SetSyncedObject(nullptr, svc::ResultSessionClosed());
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}
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/* Clear our current request. */
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cur_request = m_current_request;
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m_current_request = nullptr;
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m_server_thread = nullptr;
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}
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/* Reply to all other requests. */
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while (!m_request_queue.IsEmpty()) {
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KThread *client_thread = m_request_queue.WakeupFrontThread();
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client_thread->SetSyncedObject(nullptr, svc::ResultSessionClosed());
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}
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/* Wake up all server threads. */
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while (!m_server_queue.IsEmpty()) {
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m_server_queue.WakeupFrontThread();
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}
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}
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/* Close the current request, if we had one. */
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if (cur_request != nullptr) {
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cur_request->Close();
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}
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}
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}
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