Get rid of fastMallocGoodSize() and replace it with something generic.

Source/wtf/QuantizedAllocation.cpp

 /*
  * 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 10 matching lines @@
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * 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 WTF_SpinLock_h
-#define WTF_SpinLock_h
-
-// DESCRIPTION
-// spinLockLock() and spinLockUnlock() are simple spinlock primitives based on
-// the standard CPU primitive of atomic increment and decrement of an int at
-// a given memory address.
-
-#include "wtf/Atomics.h"
+#include "config.h"
+#include "wtf/QuantizedAllocation.h"
 
 namespace WTF {
 
-ALWAYS_INLINE void spinLockLock(int volatile* lock)
+unsigned short QuantizedAllocation::table[QuantizedAllocation::kTableSize];
+
+void QuantizedAllocation::init()
 {
-    while (atomicIncrement(lock) != 1)
-        atomicDecrement(lock);
-}
-
-ALWAYS_INLINE void spinLockUnlock(int volatile* lock)
-{
-    atomicDecrement(lock);
+    size_t currAllocation = 0;
+    size_t currRounding = kMinRounding;
+    size_t currRoundingLimit = kMinRoundingLimit / 2;
+    size_t numCurrRounding = 0;
+    for (size_t i = 0; i < kTableSize; ++i) {
+        table[i] = currRounding - 1;
+        currAllocation += kMinRoundingLimit;
+        if (currAllocation == currRoundingLimit * 2) {
+            currRoundingLimit *= 2;
+            currRounding *= 2;
+        }
+    }
 }
 
 } // namespace WTF
-
-using WTF::spinLockLock;
-using WTF::spinLockUnlock;
-
-#endif // WTF_PartitionAlloc_h