Parallel and concurrent sweeping.

src/isolate.h

 // Copyright 2012 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:
 //
 //     * 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
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 24 matching lines @@
 #include "builtins.h"
 #include "contexts.h"
 #include "execution.h"
 #include "frames.h"
 #include "date.h"
 #include "global-handles.h"
 #include "handles.h"
 #include "hashmap.h"
 #include "heap.h"
 #include "optimizing-compiler-thread.h"
+#include "sweeper-thread.h"

[Michael Starzinger, 2013/01/28 16:30:18]

There is no need to include the full header, just forward declare the
SweeperThread class below.

[Hannes Payer (out of office), 2013/01/30 10:11:27]

Done.

 #include "regexp-stack.h"
 #include "runtime-profiler.h"
 #include "runtime.h"
 #include "zone.h"
 
 namespace v8 {
 namespace internal {
 
 class Bootstrapper;
 class CodeGenerator;
@@ skipping 1008 matching lines @@
       code_stub_interface_descriptor(int index);
 
   void IterateDeferredHandles(ObjectVisitor* visitor);
   void LinkDeferredHandles(DeferredHandles* deferred_handles);
   void UnlinkDeferredHandles(DeferredHandles* deferred_handles);
 
   OptimizingCompilerThread* optimizing_compiler_thread() {
     return &optimizing_compiler_thread_;
   }
 
+  SweeperThread** sweeper_threads() {
+    return sweeper_thread_;
+  }
+
  private:
   Isolate();
 
   friend struct GlobalState;
   friend struct InitializeGlobalState;
 
   enum State {
     UNINITIALIZED,    // Some components may not have been allocated.
     INITIALIZED       // All components are fully initialized.
   };
@@ skipping 205 matching lines @@
   // between compilation units.
 #define ISOLATE_FIELD_OFFSET(type, name, ignored)                              \
   static const intptr_t name##_debug_offset_;
   ISOLATE_INIT_LIST(ISOLATE_FIELD_OFFSET)
   ISOLATE_INIT_ARRAY_LIST(ISOLATE_FIELD_OFFSET)
 #undef ISOLATE_FIELD_OFFSET
 #endif
 
   DeferredHandles* deferred_handles_head_;
   OptimizingCompilerThread optimizing_compiler_thread_;
+  SweeperThread** sweeper_thread_;
 
   friend class ExecutionAccess;
   friend class HandleScopeImplementer;
   friend class IsolateInitializer;
   friend class OptimizingCompilerThread;
+  friend class SweeperThread;
   friend class ThreadManager;
   friend class Simulator;
   friend class StackGuard;
   friend class ThreadId;
   friend class TestMemoryAllocatorScope;
   friend class v8::Isolate;
   friend class v8::Locker;
   friend class v8::Unlocker;
 
   DISALLOW_COPY_AND_ASSIGN(Isolate);
@@ skipping 130 matching lines @@
 
 // Mark the native context with out of memory.
 inline void Context::mark_out_of_memory() {
   native_context()->set_out_of_memory(HEAP->true_value());
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_ISOLATE_H_