os: implement ReadWriteBusyMutex

libraries/libstratosphere/source/os/os_rw_busy_mutex.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>
+#include "impl/os_thread_manager.hpp"
+
+#if defined(ATMOSPHERE_OS_HORIZON)
+    #include "impl/os_internal_rw_busy_mutex_impl.os.horizon.hpp"
+#else
+    #error "Unknown OS for ams::os::impl::InternalReadWriteBusyMutexImpl"
+#endif
+
+namespace ams::os {
+
+    void InitalizeReadWriteLockBusyMutex(ReadWriteBusyMutexType *rw_mutex) {
+        /* Create object. */
+        util::ConstructAt(rw_mutex->_storage);
+    }
+
+    void AcquireReadLockBusyMutex(ReadWriteBusyMutexType *rw_mutex) {
+        /* Acquire read lock. */
+        util::GetReference(rw_mutex->_storage).AcquireReadLock();
+    }
+
+    void ReleaseReadLockBusyMutex(ReadWriteBusyMutexType *rw_mutex) {
+        /* Release read lock. */
+        util::GetReference(rw_mutex->_storage).ReleaseReadLock();
+    }
+
+    void AcquireWriteLockBusyMutex(ReadWriteBusyMutexType *rw_mutex) {
+        /* Acquire write lock. */
+        util::GetReference(rw_mutex->_storage).AcquireWriteLock();
+    }
+
+    void ReleaseWriteLockBusyMutex(ReadWriteBusyMutexType *rw_mutex) {
+        /* Release write lock. */
+        util::GetReference(rw_mutex->_storage).ReleaseWriteLock();
+    }
+
+}