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@ -14,23 +14,18 @@ namespace Kernel { |
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KClientPort::KClientPort(KernelCore& kernel_) : KSynchronizationObject{kernel_} {} |
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KClientPort::~KClientPort() = default; |
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void KClientPort::Initialize(KPort* parent_port_, s32 max_sessions_, std::string&& name_) { |
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void KClientPort::Initialize(KPort* parent, s32 max_sessions) { |
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// Set member variables.
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num_sessions = 0; |
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peak_sessions = 0; |
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parent = parent_port_; |
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max_sessions = max_sessions_; |
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name = std::move(name_); |
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m_num_sessions = 0; |
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m_peak_sessions = 0; |
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m_parent = parent; |
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m_max_sessions = max_sessions; |
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} |
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void KClientPort::OnSessionFinalized() { |
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KScopedSchedulerLock sl{kernel}; |
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// This might happen if a session was improperly used with this port.
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ASSERT_MSG(num_sessions > 0, "num_sessions is invalid"); |
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const auto prev = num_sessions--; |
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if (prev == max_sessions) { |
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if (const auto prev = m_num_sessions--; prev == m_max_sessions) { |
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this->NotifyAvailable(); |
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} |
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} |
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@ -47,81 +42,81 @@ bool KClientPort::IsServerClosed() const { |
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void KClientPort::Destroy() { |
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// Note with our parent that we're closed.
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parent->OnClientClosed(); |
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m_parent->OnClientClosed(); |
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// Close our reference to our parent.
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parent->Close(); |
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m_parent->Close(); |
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} |
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bool KClientPort::IsSignaled() const { |
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return num_sessions < max_sessions; |
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return m_num_sessions.load() < m_max_sessions; |
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} |
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Result KClientPort::CreateSession(KClientSession** out) { |
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// Declare the session we're going to allocate.
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KSession* session{}; |
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// Reserve a new session from the resource limit.
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//! FIXME: we are reserving this from the wrong resource limit!
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KScopedResourceReservation session_reservation(kernel.ApplicationProcess()->GetResourceLimit(), |
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LimitableResource::SessionCountMax); |
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R_UNLESS(session_reservation.Succeeded(), ResultLimitReached); |
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// Allocate a session normally.
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session = KSession::Create(kernel); |
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// Check that we successfully created a session.
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R_UNLESS(session != nullptr, ResultOutOfResource); |
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// Update the session counts.
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{ |
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ON_RESULT_FAILURE { |
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session->Close(); |
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}; |
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// Atomically increment the number of sessions.
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s32 new_sessions{}; |
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{ |
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const auto max = max_sessions; |
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auto cur_sessions = num_sessions.load(std::memory_order_acquire); |
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const auto max = m_max_sessions; |
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auto cur_sessions = m_num_sessions.load(std::memory_order_acquire); |
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do { |
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R_UNLESS(cur_sessions < max, ResultOutOfSessions); |
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new_sessions = cur_sessions + 1; |
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} while (!num_sessions.compare_exchange_weak(cur_sessions, new_sessions, |
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std::memory_order_relaxed)); |
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} while (!m_num_sessions.compare_exchange_weak(cur_sessions, new_sessions, |
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std::memory_order_relaxed)); |
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} |
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// Atomically update the peak session tracking.
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{ |
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auto peak = peak_sessions.load(std::memory_order_acquire); |
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auto peak = m_peak_sessions.load(std::memory_order_acquire); |
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do { |
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if (peak >= new_sessions) { |
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break; |
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} |
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} while (!peak_sessions.compare_exchange_weak(peak, new_sessions, |
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std::memory_order_relaxed)); |
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} while (!m_peak_sessions.compare_exchange_weak(peak, new_sessions, |
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std::memory_order_relaxed)); |
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} |
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} |
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// Create a new session.
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KSession* session = KSession::Create(kernel); |
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if (session == nullptr) { |
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// Decrement the session count.
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const auto prev = num_sessions--; |
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if (prev == max_sessions) { |
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this->NotifyAvailable(); |
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} |
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return ResultOutOfResource; |
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} |
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// Initialize the session.
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session->Initialize(this, parent->GetName()); |
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session->Initialize(this, m_parent->GetName()); |
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// Commit the session reservation.
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session_reservation.Commit(); |
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// Register the session.
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KSession::Register(kernel, session); |
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auto session_guard = SCOPE_GUARD({ |
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ON_RESULT_FAILURE { |
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session->GetClientSession().Close(); |
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session->GetServerSession().Close(); |
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}); |
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}; |
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// Enqueue the session with our parent.
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R_TRY(parent->EnqueueSession(std::addressof(session->GetServerSession()))); |
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R_TRY(m_parent->EnqueueSession(std::addressof(session->GetServerSession()))); |
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// We succeeded, so set the output.
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session_guard.Cancel(); |
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*out = std::addressof(session->GetClientSession()); |
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return ResultSuccess; |
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R_SUCCEED(); |
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} |
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} // namespace Kernel
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