ddsf: implement namespace

libraries/libstratosphere/source/ddsf/ddsf_session_api.cpp

@@ -0,0 +1,49 @@
+/*
+ * 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>
+
+namespace ams::ddsf {
+
+    Result OpenSession(IDevice *device, ISession *session, AccessMode access_mode) {
+        /* Check pre-conditions. */
+        AMS_ASSERT(device != nullptr);
+        AMS_ASSERT(session != nullptr);
+        AMS_ASSERT(!session->IsOpen());
+
+        /* Attack the session to the device. */
+        session->AttachDevice(device, access_mode);
+        auto session_guard = SCOPE_GUARD { session->DetachDevice(); };
+
+        /* Attach the device to the session. */
+        R_TRY(device->AttachSession(session));
+
+        /* We succeeded. */
+        session_guard.Cancel();
+        return ResultSuccess();
+    }
+
+    void CloseSession(ISession *session) {
+        /* Check pre-conditions. */
+        AMS_ASSERT(session != nullptr);
+
+        /* Detach the device from the session. */
+        session->GetDevice().DetachSession(session);
+
+        /* Detach the session from the device. */
+        session->DetachDevice();
+    }
+
+}