Added parallel marking threads.

src/marking-thread.h

Index: src/marking-thread.h
diff --git a/src/sweeper-thread.h b/src/marking-thread.h
similarity index 69%
copy from src/sweeper-thread.h
copy to src/marking-thread.h
index ba793c2043bd2724132bb7ab4dbaafcd55044468..887aceb77cf4e66d14564e17d7e0c2016f79023b 100644
--- a/src/sweeper-thread.h
+++ b/src/marking-thread.h
@@ -25,8 +25,8 @@
 // (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 V8_SWEEPER_THREAD_H_
-#define V8_SWEEPER_THREAD_H_
+#ifndef V8_MARKING_THREAD_H_
+#define V8_MARKING_THREAD_H_
 
 #include "atomicops.h"
 #include "flags.h"
@@ -40,42 +40,32 @@
 namespace v8 {
 namespace internal {
 
-class SweeperThread : public Thread {
+class MarkingThread : public Thread {
  public:
-  explicit SweeperThread(Isolate* isolate);
+  explicit MarkingThread(Isolate* isolate);
 
   void Run();
   void Stop();
-  void StartSweeping();
-  void WaitForSweeperThread();
-  intptr_t StealMemory(PagedSpace* space);
+  void StartMarking();
+  void WaitForMarkingThread();
 
-  static bool sweeping_pending() { return sweeping_pending_; }
-  static void set_sweeping_pending(bool sweeping_pending) {
-    sweeping_pending_ = sweeping_pending;
-  }
-
-  ~SweeperThread() {
-    delete start_sweeping_semaphore_;
-    delete end_sweeping_semaphore_;
+  ~MarkingThread() {
+    delete start_marking_semaphore_;
+    delete end_marking_semaphore_;
     delete stop_semaphore_;
   }
 
  private:
   Isolate* isolate_;
   Heap* heap_;
-  MarkCompactCollector* collector_;
-  Semaphore* start_sweeping_semaphore_;
-  Semaphore* end_sweeping_semaphore_;
+  Semaphore* start_marking_semaphore_;
+  Semaphore* end_marking_semaphore_;
   Semaphore* stop_semaphore_;
-  FreeList free_list_old_data_space_;
-  FreeList free_list_old_pointer_space_;
-  FreeList private_free_list_old_data_space_;
-  FreeList private_free_list_old_pointer_space_;
   volatile AtomicWord stop_thread_;
-  static bool sweeping_pending_;
+  int id_;
+  static Atomic32 id_counter_;
 };
 
 } }  // namespace v8::internal
 
-#endif  // V8_SWEEPER_THREAD_H_
+#endif  // V8_MARKING_THREAD_H_