webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

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diff --git a/Source/WTF/wtf/glib/GMutexLocker.h b/Source/WTF/wtf/glib/GMutexLocker.h
new file mode 100644
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+++ b/Source/WTF/wtf/glib/GMutexLocker.h
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+/*
+ *  Copyright (C) 2013 Collabora Ltd.
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Library General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2 of the License, or (at your option) any later version.
+ *
+ *  This library 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
+ *  Library General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Library General Public License
+ *  along with this library; see the file COPYING.LIB.  If not, write to
+ *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ *  Boston, MA 02110-1301, USA.
+ */
+
+#ifndef GMutexLocker_h
+#define GMutexLocker_h
+
+#if USE(GLIB)
+
+#include <glib.h>
+#include <wtf/Noncopyable.h>
+
+namespace WTF {
+
+template<typename T>
+struct MutexWrapper;
+
+template<>
+struct MutexWrapper<GMutex> {
+    static void lock(GMutex* mutex)
+    {
+        g_mutex_lock(mutex);
+    }
+
+    static void unlock(GMutex* mutex)
+    {
+        g_mutex_unlock(mutex);
+    }
+};
+
+template<>
+struct MutexWrapper<GRecMutex> {
+    static void lock(GRecMutex* mutex)
+    {
+        g_rec_mutex_lock(mutex);
+    }
+
+    static void unlock(GRecMutex* mutex)
+    {
+        g_rec_mutex_unlock(mutex);
+    }
+};
+
+template<typename T>
+class GMutexLocker {
+    WTF_MAKE_NONCOPYABLE(GMutexLocker);
+public:
+    explicit GMutexLocker(T& mutex)
+        : m_mutex(mutex)
+        , m_locked(false)
+    {
+        lock();
+    }
+
+    ~GMutexLocker()
+    {
+        unlock();
+    }
+
+    void lock()
+    {
+        if (m_locked)
+            return;
+
+        MutexWrapper<T>::lock(&m_mutex);
+        m_locked = true;
+    }
+
+    void unlock()
+    {
+        if (!m_locked)
+            return;
+
+        m_locked = false;
+        MutexWrapper<T>::unlock(&m_mutex);
+    }
+
+private:
+    T& m_mutex;
+    bool m_locked;
+};
+
+} // namespace WTF
+
+#endif // USE(GLIB)
+
+#endif // GMutexLocker_h