os: implement ReadWriteBusyMutex

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

@@ -0,0 +1,76 @@
+/*
+ * 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_rw_busy_mutex_types.hpp>
+#include <stratosphere/os/os_rw_busy_mutex_api.hpp>
+
+namespace ams::os {
+
+    class ReadWriteBusyMutex {
+        NON_COPYABLE(ReadWriteBusyMutex);
+        NON_MOVEABLE(ReadWriteBusyMutex);
+        private:
+            ReadWriteBusyMutexType m_rw_mutex;
+        public:
+            constexpr explicit ReadWriteBusyMutex() : m_rw_mutex{{0}} { /* ... */ }
+
+            void AcquireReadLock() {
+                return os::AcquireReadLockBusyMutex(std::addressof(m_rw_mutex));
+            }
+
+            void ReleaseReadLock() {
+                return os::ReleaseReadLockBusyMutex(std::addressof(m_rw_mutex));
+            }
+
+            void AcquireWriteLock() {
+                return os::AcquireWriteLockBusyMutex(std::addressof(m_rw_mutex));
+            }
+
+            void ReleaseWriteLock() {
+                return os::ReleaseWriteLockBusyMutex(std::addressof(m_rw_mutex));
+            }
+
+            void lock_shared() {
+                return this->AcquireReadLock();
+            }
+
+            void unlock_shared() {
+                return this->ReleaseReadLock();
+            }
+
+            void lock() {
+                return this->AcquireWriteLock();
+            }
+
+            void unlock() {
+                return this->ReleaseWriteLock();
+            }
+
+            operator ReadWriteBusyMutexType &() {
+                return m_rw_mutex;
+            }
+
+            operator const ReadWriteBusyMutexType &() const {
+                return m_rw_mutex;
+            }
+
+            ReadWriteBusyMutexType *GetBase() {
+                return std::addressof(m_rw_mutex);
+            }
+    };
+
+}