Added parallel marking threads.

src/marking-thread.h

Index: src/marking-thread.h
diff --git a/src/vm-state.h b/src/marking-thread.h
similarity index 68%
copy from src/vm-state.h
copy to src/marking-thread.h
index 831e2d396b28df16f5aec105220d4e301ae77994..9efa3af13262165972abf179defac6f83fed4ac9 100644
--- a/src/vm-state.h
+++ b/src/marking-thread.h
@@ -1,4 +1,4 @@
-// Copyright 2010 the V8 project authors. All rights reserved.
+// Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
@@ -25,36 +25,47 @@
 // (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_VM_STATE_H_
-#define V8_VM_STATE_H_
+#ifndef V8_MARKING_THREAD_H_
+#define V8_MARKING_THREAD_H_
 
-#include "allocation.h"
-#include "isolate.h"
+#include "atomicops.h"
+#include "flags.h"
+#include "platform.h"
+#include "v8utils.h"
+
+#include "spaces.h"
+
+#include "heap.h"
 
 namespace v8 {
 namespace internal {
 
-class VMState BASE_EMBEDDED {
+class MarkingThread : public Thread {
  public:
-  inline VMState(Isolate* isolate, StateTag tag);
-  inline ~VMState();
+  explicit MarkingThread(Isolate* isolate);
 
- private:
-  Isolate* isolate_;
-  StateTag previous_tag_;
-};
+  void Run();
+  void Stop();
+  void StartMarking();
+  void WaitForMarkingThread();
 
+  ~MarkingThread() {
+    delete start_marking_semaphore_;

[tfarina, 2013/01/31 21:20:30]

isn't there a scoped_ptr type to handle this?

+    delete end_marking_semaphore_;
+    delete stop_semaphore_;
+  }
 
-class ExternalCallbackScope BASE_EMBEDDED {
- public:
-  inline ExternalCallbackScope(Isolate* isolate, Address callback);
-  inline ~ExternalCallbackScope();
  private:
   Isolate* isolate_;
-  Address previous_callback_;
+  Heap* heap_;
+  Semaphore* start_marking_semaphore_;
+  Semaphore* end_marking_semaphore_;
+  Semaphore* stop_semaphore_;
+  volatile AtomicWord stop_thread_;
+  int id_;
+  static Atomic32 id_counter_;
 };
 
 } }  // namespace v8::internal
 
-
-#endif  // V8_VM_STATE_H_
+#endif  // V8_MARKING_THREAD_H_