1 files changed, 92 insertions, 0 deletions
diff --git a/wsrep-lib/include/wsrep/mutex.hpp b/wsrep-lib/include/wsrep/mutex.hpp
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+++ b/wsrep-lib/include/wsrep/mutex.hpp
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+/*
+ * Copyright (C) 2018 Codership Oy <info@codership.com>
+ *
+ * This file is part of wsrep-lib.
+ *
+ * Wsrep-lib is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * Wsrep-lib is distributed in the hope that 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 wsrep-lib.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef WSREP_MUTEX_HPP
+#define WSREP_MUTEX_HPP
+
+#include "compiler.hpp"
+#include "exception.hpp"
+
+
+#include <pthread.h>
+
+namespace wsrep
+{
+    /**
+     * Mutex interface.
+     */
+    class mutex
+    {
+    public:
+        mutex() { }
+        virtual ~mutex() { }
+        virtual void lock() = 0;
+        virtual void unlock() = 0;
+        /* Return native handle */
+        virtual void* native() = 0;
+    private:
+        mutex(const mutex& other);
+        mutex& operator=(const mutex& other);
+    };
+
+    // Default pthread implementation
+    class default_mutex : public wsrep::mutex
+    {
+    public:
+        default_mutex()
+            : wsrep::mutex(),
+              mutex_()
+        {
+            if (pthread_mutex_init(&mutex_, 0))
+            {
+                throw wsrep::runtime_error("mutex init failed");
+            }
+        }
+        ~default_mutex() WSREP_OVERRIDE
+        {
+            if (pthread_mutex_destroy(&mutex_)) ::abort();
+        }
+
+        void lock() WSREP_OVERRIDE
+        {
+            if (pthread_mutex_lock(&mutex_))
+            {
+                throw wsrep::runtime_error("mutex lock failed");
+            }
+        }
+
+        void unlock() WSREP_OVERRIDE
+        {
+            if (pthread_mutex_unlock(&mutex_))
+            {
+                throw wsrep::runtime_error("mutex unlock failed");
+            }
+        }
+
+        void* native() WSREP_OVERRIDE
+        {
+            return &mutex_;
+        }
+
+    private:
+        pthread_mutex_t mutex_;
+    };
+}
+
+#endif // WSREP_MUTEX_HPP