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

Source/wtf/Partitions.cpp

Index: Source/wtf/Partitions.cpp
diff --git a/Source/platform/Partitions.cpp b/Source/wtf/Partitions.cpp
similarity index 77%
rename from Source/platform/Partitions.cpp
rename to Source/wtf/Partitions.cpp
index 33072f0dc9ddd0cb62a222c03ad55d6ce605f91d..8d131d408d1f0a15f5535aeab7273be58f198340 100644
--- a/Source/platform/Partitions.cpp
+++ b/Source/wtf/Partitions.cpp
@@ -29,26 +29,43 @@
  */
 
 #include "config.h"
-#include "platform/Partitions.h"
+#include "wtf/Partitions.h"
 
-namespace blink {
+#include "wtf/DefaultAllocator.h"
+#include "wtf/FastMalloc.h"
 
+namespace WTF {
+
+bool Partitions::s_initialized;
+
+PartitionAllocatorGeneric Partitions::m_bufferAllocator;
 SizeSpecificPartitionAllocator<3328> Partitions::m_objectModelAllocator;
 SizeSpecificPartitionAllocator<1024> Partitions::m_renderingAllocator;
 
-void Partitions::init()
+void Partitions::initialize()
 {
-    m_objectModelAllocator.init();
-    m_renderingAllocator.init();
+    static int lock = 0;
+    // Guard against two threads hitting here in parallel.
+    spinLockLock(&lock);
+    if (!s_initialized) {
+        m_bufferAllocator.init();
+        m_objectModelAllocator.init();
+        m_renderingAllocator.init();
+        s_initialized = true;
+    }
+    spinLockUnlock(&lock);
 }
 
 void Partitions::shutdown()
 {
+    fastMallocShutdown();
+
     // We could ASSERT here for a memory leak within the partition, but it leads
     // to very hard to diagnose ASSERTs, so it's best to leave leak checking for
     // the valgrind and heapcheck bots, which run without partitions.
     (void) m_renderingAllocator.shutdown();
     (void) m_objectModelAllocator.shutdown();
+    (void) m_bufferAllocator.shutdown();
 }
 
-} // namespace blink
+} // namespace WTF