git subrepo clone https://github.com/Atmosphere-NX/Atmosphere-libs libraries

subrepo:
  subdir:   "libraries"
  merged:   "07af583b"
upstream:
  origin:   "https://github.com/Atmosphere-NX/Atmosphere-libs"
  branch:   "master"
  commit:   "07af583b"
git-subrepo:
  version:  "0.4.0"
  origin:   "https://github.com/ingydotnet/git-subrepo"
  commit:   "5d6aba9"

libraries/libstratosphere/include/stratosphere/os/os_system_event.hpp

@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2018-2019 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/>.
+ */
+
+#pragma once
+#include "os_event.hpp"
+
+namespace ams::os {
+
+    class WaitableHolder;
+
+    namespace impl {
+
+        class InterProcessEvent;
+
+    }
+
+    enum class SystemEventState {
+        Uninitialized,
+        Event,
+        InterProcessEvent,
+    };
+
+    class SystemEvent {
+        friend class WaitableHolder;
+        NON_COPYABLE(SystemEvent);
+        NON_MOVEABLE(SystemEvent);
+        private:
+            union {
+                util::TypedStorage<Event, sizeof(Event), alignof(Event)> storage_for_event;
+                util::TypedStorage<impl::InterProcessEvent, 3 * sizeof(Handle), alignof(Handle)> storage_for_inter_process_event;
+            };
+            SystemEventState state;
+        private:
+            Event &GetEvent();
+            const Event &GetEvent() const;
+            impl::InterProcessEvent &GetInterProcessEvent();
+            const impl::InterProcessEvent &GetInterProcessEvent() const;
+        public:
+            SystemEvent() : state(SystemEventState::Uninitialized) { /* ... */ }
+            SystemEvent(bool inter_process, bool autoclear = true);
+            SystemEvent(Handle read_handle, bool manage_read_handle, Handle write_handle, bool manage_write_handle, bool autoclear = true);
+            SystemEvent(Handle read_handle, bool manage_read_handle, bool autoclear = true) : SystemEvent(read_handle, manage_read_handle, INVALID_HANDLE, false, autoclear) { /* ... */ }
+            ~SystemEvent();
+
+            Result InitializeAsEvent(bool autoclear = true);
+            Result InitializeAsInterProcessEvent(bool autoclear = true);
+            void AttachHandles(Handle read_handle, bool manage_read_handle, Handle write_handle, bool manage_write_handle, bool autoclear = true);
+            void AttachReadableHandle(Handle read_handle, bool manage_read_handle, bool autoclear = true);
+            void AttachWritableHandle(Handle write_handle, bool manage_write_handle, bool autoclear = true);
+            Handle DetachReadableHandle();
+            Handle DetachWritableHandle();
+            Handle GetReadableHandle() const;
+            Handle GetWritableHandle() const;
+            void Finalize();
+
+            SystemEventState GetState() const {
+                return this->state;
+            }
+
+            void Signal();
+            void Reset();
+            void Wait();
+            bool TryWait();
+            bool TimedWait(u64 ns);
+    };
+
+}