PartitionAlloc: Centralize Partition allocators into one place (Part 1)

Source/wtf/Partitions.h

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 13 matching lines @@
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef Partitions_h
 #define Partitions_h
 
-#include "platform/PlatformExport.h"
 #include "wtf/PartitionAlloc.h"
+#include "wtf/WTFExport.h"
 
-namespace blink {
+namespace WTF {
 
-class PLATFORM_EXPORT Partitions {
+class WTF_EXPORT Partitions {
 public:
-    static void init();
+    static void initialize();
     static void shutdown();
+    ALWAYS_INLINE static PartitionRootGeneric* getBufferPartition()
+    {
+        if (UNLIKELY(!s_initialized))
+            initialize();
+        return m_bufferAllocator.root();
+    }
 
     ALWAYS_INLINE static PartitionRoot* getObjectModelPartition() { return m_objectModelAllocator.root(); }
     ALWAYS_INLINE static PartitionRoot* getRenderingPartition() { return m_renderingAllocator.root(); }
 
     static size_t currentDOMMemoryUsage()
     {
         return m_objectModelAllocator.root()->totalSizeOfCommittedPages;
     }
 
 private:
+    static bool s_initialized;
+    static PartitionAllocatorGeneric m_bufferAllocator;
     static SizeSpecificPartitionAllocator<3328> m_objectModelAllocator;
     static SizeSpecificPartitionAllocator<1024> m_renderingAllocator;
 };
 
-} // namespace blink
+} // namespace WTF
 
 #endif // Partitions_h