kern: implement KEvent, KWritableEvent, KServerSession::OnClientClosed

libraries/libmesosphere/source/kern_k_event.cpp

@@ -0,0 +1,58 @@
+/*
+ * 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 <mesosphere.hpp>
+
+namespace ams::kern {
+
+    void KEvent::Initialize() {
+        MESOSPHERE_ASSERT_THIS();
+
+        /* Increment reference count. */
+        /* Because reference count is one on creation, this will result */
+        /* in a reference count of two. Thus, when both readable and */
+        /* writable events are closed this object will be destroyed. */
+        this->Open();
+
+        /* Create our sub events. */
+        KAutoObject::Create(std::addressof(this->readable_event));
+        KAutoObject::Create(std::addressof(this->writable_event));
+
+        /* Initialize our sub sessions. */
+        this->readable_event.Initialize(this);
+        this->writable_event.Initialize(this);
+
+        /* Set our owner process. */
+        this->owner = GetCurrentProcessPointer();
+        this->owner->Open();
+
+        /* Mark initialized. */
+        this->initialized = true;
+    }
+
+    void KEvent::Finalize() {
+        MESOSPHERE_ASSERT_THIS();
+
+        KAutoObjectWithSlabHeapAndContainer<KEvent, KAutoObjectWithList>::Finalize();
+    }
+
+    void KEvent::PostDestroy(uintptr_t arg) {
+        /* Release the event count resource the owner process holds. */
+        KProcess *owner = reinterpret_cast<KProcess *>(arg);
+        owner->ReleaseResource(ams::svc::LimitableResource_EventCountMax, 1);
+        owner->Close();
+    }
+
+}