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/source/os/os_system_event.cpp

@@ -0,0 +1,188 @@
+/*
+ * 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/>.
+ */
+#include <stratosphere.hpp>
+#include "impl/os_waitable_holder_impl.hpp"
+
+namespace ams::os {
+
+    SystemEvent::SystemEvent(bool inter_process, bool autoclear) : state(SystemEventState::Uninitialized) {
+        if (inter_process) {
+            R_ASSERT(this->InitializeAsInterProcessEvent(autoclear));
+        } else {
+            R_ASSERT(this->InitializeAsEvent(autoclear));
+        }
+    }
+
+    SystemEvent::SystemEvent(Handle read_handle, bool manage_read_handle, Handle write_handle, bool manage_write_handle, bool autoclear) : state(SystemEventState::Uninitialized)  {
+        this->AttachHandles(read_handle, manage_read_handle, write_handle, manage_write_handle, autoclear);
+    }
+
+    SystemEvent::~SystemEvent() {
+        this->Finalize();
+    }
+
+    Event &SystemEvent::GetEvent() {
+        AMS_ASSERT(this->state == SystemEventState::Event);
+        return GetReference(this->storage_for_event);
+    }
+
+    const Event &SystemEvent::GetEvent() const {
+        AMS_ASSERT(this->state == SystemEventState::Event);
+        return GetReference(this->storage_for_event);
+    }
+
+    impl::InterProcessEvent &SystemEvent::GetInterProcessEvent() {
+        AMS_ASSERT(this->state == SystemEventState::InterProcessEvent);
+        return GetReference(this->storage_for_inter_process_event);
+    }
+
+    const impl::InterProcessEvent &SystemEvent::GetInterProcessEvent() const {
+        AMS_ASSERT(this->state == SystemEventState::InterProcessEvent);
+        return GetReference(this->storage_for_inter_process_event);
+    }
+
+    Result SystemEvent::InitializeAsEvent(bool autoclear) {
+        AMS_ASSERT(this->state == SystemEventState::Uninitialized);
+        new (GetPointer(this->storage_for_event)) Event(autoclear);
+        this->state = SystemEventState::Event;
+        return ResultSuccess();
+    }
+
+    Result SystemEvent::InitializeAsInterProcessEvent(bool autoclear) {
+        AMS_ASSERT(this->state == SystemEventState::Uninitialized);
+        new (GetPointer(this->storage_for_inter_process_event)) impl::InterProcessEvent();
+        this->state = SystemEventState::InterProcessEvent;
+
+        /* Ensure we end up in a correct state if initialization fails. */
+        {
+            auto guard = SCOPE_GUARD { this->Finalize(); };
+            R_TRY(this->GetInterProcessEvent().Initialize(autoclear));
+            guard.Cancel();
+        }
+
+        return ResultSuccess();
+    }
+
+    void SystemEvent::AttachHandles(Handle read_handle, bool manage_read_handle, Handle write_handle, bool manage_write_handle, bool autoclear) {
+        AMS_ASSERT(this->state == SystemEventState::Uninitialized);
+        new (GetPointer(this->storage_for_inter_process_event)) impl::InterProcessEvent();
+        this->state = SystemEventState::InterProcessEvent;
+        this->GetInterProcessEvent().Initialize(read_handle, manage_read_handle, write_handle, manage_write_handle, autoclear);
+    }
+
+    void SystemEvent::AttachReadableHandle(Handle read_handle, bool manage_read_handle, bool autoclear) {
+        this->AttachHandles(read_handle, manage_read_handle, INVALID_HANDLE, false, autoclear);
+    }
+
+    void SystemEvent::AttachWritableHandle(Handle write_handle, bool manage_write_handle, bool autoclear) {
+        this->AttachHandles(INVALID_HANDLE, false, write_handle, manage_write_handle, autoclear);
+    }
+
+    Handle SystemEvent::DetachReadableHandle() {
+        AMS_ASSERT(this->state == SystemEventState::InterProcessEvent);
+        return this->GetInterProcessEvent().DetachReadableHandle();
+    }
+
+    Handle SystemEvent::DetachWritableHandle() {
+        AMS_ASSERT(this->state == SystemEventState::InterProcessEvent);
+        return this->GetInterProcessEvent().DetachWritableHandle();
+    }
+
+    Handle SystemEvent::GetReadableHandle() const {
+        AMS_ASSERT(this->state == SystemEventState::InterProcessEvent);
+        return this->GetInterProcessEvent().GetReadableHandle();
+    }
+
+    Handle SystemEvent::GetWritableHandle() const {
+        AMS_ASSERT(this->state == SystemEventState::InterProcessEvent);
+        return this->GetInterProcessEvent().GetWritableHandle();
+    }
+
+    void SystemEvent::Finalize() {
+        switch (this->state) {
+            case SystemEventState::Uninitialized:
+                break;
+            case SystemEventState::Event:
+                this->GetEvent().~Event();
+                break;
+            case SystemEventState::InterProcessEvent:
+                this->GetInterProcessEvent().~InterProcessEvent();
+                break;
+            AMS_UNREACHABLE_DEFAULT_CASE();
+        }
+        this->state = SystemEventState::Uninitialized;
+    }
+
+    void SystemEvent::Signal() {
+        switch (this->state) {
+            case SystemEventState::Event:
+                this->GetEvent().Signal();
+                break;
+            case SystemEventState::InterProcessEvent:
+                this->GetInterProcessEvent().Signal();
+                break;
+            case SystemEventState::Uninitialized:
+            AMS_UNREACHABLE_DEFAULT_CASE();
+        }
+    }
+
+    void SystemEvent::Reset() {
+        switch (this->state) {
+            case SystemEventState::Event:
+                this->GetEvent().Reset();
+                break;
+            case SystemEventState::InterProcessEvent:
+                this->GetInterProcessEvent().Reset();
+                break;
+            case SystemEventState::Uninitialized:
+            AMS_UNREACHABLE_DEFAULT_CASE();
+        }
+    }
+    void SystemEvent::Wait() {
+        switch (this->state) {
+            case SystemEventState::Event:
+                this->GetEvent().Wait();
+                break;
+            case SystemEventState::InterProcessEvent:
+                this->GetInterProcessEvent().Wait();
+                break;
+            case SystemEventState::Uninitialized:
+            AMS_UNREACHABLE_DEFAULT_CASE();
+        }
+    }
+
+    bool SystemEvent::TryWait() {
+        switch (this->state) {
+            case SystemEventState::Event:
+                return this->GetEvent().TryWait();
+            case SystemEventState::InterProcessEvent:
+                return this->GetInterProcessEvent().TryWait();
+            case SystemEventState::Uninitialized:
+            AMS_UNREACHABLE_DEFAULT_CASE();
+        }
+    }
+
+    bool SystemEvent::TimedWait(u64 ns) {
+        switch (this->state) {
+            case SystemEventState::Event:
+                return this->GetEvent().TimedWait(ns);
+            case SystemEventState::InterProcessEvent:
+                return this->GetInterProcessEvent().TimedWait(ns);
+            case SystemEventState::Uninitialized:
+            AMS_UNREACHABLE_DEFAULT_CASE();
+        }
+    }
+}