hle: kernel: Migrate KSession, KClientSession, and KServerSession to KAutoObject.

src/core/hle/kernel/k_session.cpp

@@ -0,0 +1,67 @@
+// Copyright 2019 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/assert.h"
+#include "core/hle/kernel/k_client_session.h"
+#include "core/hle/kernel/k_scoped_resource_reservation.h"
+#include "core/hle/kernel/k_server_session.h"
+#include "core/hle/kernel/k_session.h"
+
+namespace Kernel {
+
+KSession::KSession(KernelCore& kernel)
+    : KAutoObjectWithSlabHeapAndContainer{kernel}, server{kernel}, client{kernel} {}
+KSession::~KSession() = default;
+
+void KSession::Initialize(std::string&& name_) {
+    // Increment reference count.
+    // Because reference count is one on creation, this will result
+    // in a reference count of two. Thus, when both server and client are closed
+    // this object will be destroyed.
+    Open();
+
+    // Create our sub sessions.
+    KAutoObject::Create(std::addressof(server));
+    KAutoObject::Create(std::addressof(client));
+
+    // Initialize our sub sessions.
+    server.Initialize(this, name_ + ":Server");
+    client.Initialize(this, name_ + ":Client");
+
+    // Set state and name.
+    SetState(State::Normal);
+    name = std::move(name_);
+
+    // Set our owner process.
+    process = kernel.CurrentProcess();
+    process->Open();
+
+    // Mark initialized.
+    initialized = true;
+}
+
+void KSession::Finalize() {}
+
+void KSession::OnServerClosed() {
+    if (GetState() == State::Normal) {
+        SetState(State::ServerClosed);
+        client.OnServerClosed();
+    }
+}
+
+void KSession::OnClientClosed() {
+    if (GetState() == State::Normal) {
+        SetState(State::ClientClosed);
+        server.OnClientClosed();
+    }
+}
+
+void KSession::PostDestroy(uintptr_t arg) {
+    // Release the session count resource the owner process holds.
+    Process* owner = reinterpret_cast<Process*>(arg);
+    owner->GetResourceLimit()->Release(LimitableResource::Sessions, 1);
+    owner->Close();
+}
+
+} // namespace Kernel