fssystem: add RomFsFileSystem

libraries/libstratosphere/source/fssystem/buffers/fssystem_buffer_manager_utils.cpp

@@ -0,0 +1,52 @@
+/*
+ * 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>
+
+namespace ams::fssystem::buffers {
+
+    namespace {
+
+        /* TODO: os::SdkThreadLocalStorage g_buffer_manager_context_tls_slot; */
+
+        class ThreadLocalStorageWrapper {
+            private:
+                os::TlsSlot tls_slot;
+            public:
+                ThreadLocalStorageWrapper() { R_ABORT_UNLESS(os::AllocateTlsSlot(std::addressof(this->tls_slot), nullptr)); }
+                ~ThreadLocalStorageWrapper() { os::FreeTlsSlot(this->tls_slot); }
+
+                void SetValue(uintptr_t value) { os::SetTlsValue(this->tls_slot, value); }
+                uintptr_t GetValue() const { return os::GetTlsValue(this->tls_slot); }
+                os::TlsSlot GetTlsSlot() const { return this->tls_slot; }
+        } g_buffer_manager_context_tls_slot;
+
+    }
+
+    void RegisterBufferManagerContext(const BufferManagerContext *context) {
+        g_buffer_manager_context_tls_slot.SetValue(reinterpret_cast<uintptr_t>(context));
+    }
+
+    BufferManagerContext *GetBufferManagerContext() {
+        return reinterpret_cast<BufferManagerContext *>(g_buffer_manager_context_tls_slot.GetValue());
+    }
+
+    void EnableBlockingBufferManagerAllocation() {
+        if (auto context = GetBufferManagerContext(); context != nullptr) {
+            context->SetNeedBlocking(true);
+        }
+    }
+
+}