os: implement BusyMutex

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

@@ -0,0 +1,70 @@
+/*
+ * 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/>.
+ */
+
+#pragma once
+#include <stratosphere/os/os_busy_mutex_types.hpp>
+#include <stratosphere/os/os_busy_mutex_api.hpp>
+
+namespace ams::os {
+
+    class BusyMutex {
+        NON_COPYABLE(BusyMutex);
+        NON_MOVEABLE(BusyMutex);
+        private:
+            BusyMutexType m_mutex;
+        public:
+            constexpr explicit BusyMutex() : m_mutex{::ams::os::BusyMutexType::State_Initialized, nullptr, {{}}} { /* ... */ }
+
+            ~BusyMutex() { FinalizeBusyMutex(std::addressof(m_mutex)); }
+
+            void lock() {
+                return LockBusyMutex(std::addressof(m_mutex));
+            }
+
+            void unlock() {
+                return UnlockBusyMutex(std::addressof(m_mutex));
+            }
+
+            bool try_lock() {
+                return TryLockBusyMutex(std::addressof(m_mutex));
+            }
+
+            ALWAYS_INLINE void Lock() {
+                return this->lock();
+            }
+
+            ALWAYS_INLINE void Unlock() {
+                return this->unlock();
+            }
+
+            ALWAYS_INLINE bool TryLock() {
+                return this->try_lock();
+            }
+
+            operator BusyMutexType &() {
+                return m_mutex;
+            }
+
+            operator const BusyMutexType &() const {
+                return m_mutex;
+            }
+
+            BusyMutexType *GetBase() {
+                return std::addressof(m_mutex);
+            }
+    };
+
+}