Enhancements to PartitionAlloc to support threading and arbitrary allocation sizes.

Source/wtf/SpinLock.h

Index: Source/wtf/SpinLock.h
diff --git a/Source/wtf/testing/WTFTestHelpers.h b/Source/wtf/SpinLock.h
similarity index 74%
copy from Source/wtf/testing/WTFTestHelpers.h
copy to Source/wtf/SpinLock.h
index 7d8bb3193fbac7f0352eb63067326f4c8b9eea8c..ae2f11675f7e006b22994b0de6695d700f2e4dda 100644
--- a/Source/wtf/testing/WTFTestHelpers.h
+++ b/Source/wtf/SpinLock.h
@@ -28,29 +28,32 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef WTFTestHelpers_h
-#define WTFTestHelpers_h
+#ifndef WTF_SpinLock_h
+#define WTF_SpinLock_h
 
-#include "wtf/text/CString.h"
-#include "wtf/text/WTFString.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 <ostream> // NOLINT
+#include "wtf/Atomics.h"
 
 namespace WTF {
 
-// Output stream operator so gTest's macros work with WebCore strings.
-static std::ostream& operator<<(std::ostream& out, const String& str)
+ALWAYS_INLINE void spinLockLock(int volatile* lock)
 {
-    return str.isEmpty() ? out : out << str.utf8().data();
+    while (atomicIncrement(lock) != 1)
+        atomicDecrement(lock);
 }
 
-// Output stream operator so gtest can print WTF::CString.
-static std::ostream& operator<<(std::ostream& out, const CString& str)
+ALWAYS_INLINE void spinLockUnlock(int volatile* lock)
 {
-    return out << str.data();
+    atomicDecrement(lock);
 }
 
 } // namespace WTF
 
+using WTF::spinLockLock;
+using WTF::spinLockUnlock;
 
-#endif // WTFTestHelpers_h
+#endif // WTF_PartitionAlloc_h