htc: skeleton HtcsManagerImpl, implement HtcsMonitor

libraries/libstratosphere/source/htcs/impl/htcs_manager_holder.cpp

@@ -0,0 +1,79 @@
+/*
+ * 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 <stratosphere.hpp>
+#include "htcs_manager.hpp"
+
+namespace ams::htcs::impl::HtcsManagerHolder {
+
+    namespace {
+
+        constinit os::SdkMutex g_holder_mutex;
+        constinit int g_holder_reference_count = 0;
+
+        mem::StandardAllocator g_allocator;
+
+        constinit HtcsManager *g_manager = nullptr;
+
+        alignas(os::MemoryPageSize) u8 g_heap_buffer[416_KB];
+
+    }
+
+    void AddReference() {
+        std::scoped_lock lk(g_holder_mutex);
+
+        if ((g_holder_reference_count++) == 0) {
+            /* Add reference to the htclow manager. */
+            htclow::HtclowManagerHolder::AddReference();
+
+            /* Initialize the allocator for the manager. */
+            g_allocator.Initialize(g_heap_buffer, sizeof(g_heap_buffer));
+
+            /* Allocate the manager. */
+            g_manager = static_cast<HtcsManager *>(g_allocator.Allocate(sizeof(HtcsManager), alignof(HtcsManager)));
+
+            /* Construct the manager. */
+            std::construct_at(g_manager, std::addressof(g_allocator), htclow::HtclowManagerHolder::GetHtclowManager());
+        }
+
+        AMS_ASSERT(g_holder_reference_count > 0);
+    }
+
+    void Release() {
+        std::scoped_lock lk(g_holder_mutex);
+
+        AMS_ASSERT(g_holder_reference_count > 0);
+
+        if ((--g_holder_reference_count) == 0) {
+            /* Destroy the manager. */
+            std::destroy_at(g_manager);
+            g_allocator.Free(g_manager);
+            g_manager = nullptr;
+
+            /* Finalize the allocator. */
+            g_allocator.Finalize();
+
+            /* Release reference to the htclow manager. */
+            htclow::HtclowManagerHolder::Release();
+        }
+    }
+
+    HtcsManager *GetHtcsManager() {
+        std::scoped_lock lk(g_holder_mutex);
+
+        return g_manager;
+    }
+
+}