Cleanup Semaphore class.

src/sweeper-thread.cc

Index: src/sweeper-thread.cc
diff --git a/src/sweeper-thread.cc b/src/sweeper-thread.cc
index ede567a48574ede71132dcd405727dbfe2819452..58c684a54f62c40f0f1aa51f761b99c0f64189dc 100644
--- a/src/sweeper-thread.cc
+++ b/src/sweeper-thread.cc
@@ -42,9 +42,9 @@ SweeperThread::SweeperThread(Isolate* isolate)
        isolate_(isolate),
        heap_(isolate->heap()),
        collector_(heap_->mark_compact_collector()),
-       start_sweeping_semaphore_(OS::CreateSemaphore(0)),
-       end_sweeping_semaphore_(OS::CreateSemaphore(0)),
-       stop_semaphore_(OS::CreateSemaphore(0)),
+       start_sweeping_semaphore_(0),
+       end_sweeping_semaphore_(0),
+       stop_semaphore_(0),
        free_list_old_data_space_(heap_->paged_space(OLD_DATA_SPACE)),
        free_list_old_pointer_space_(heap_->paged_space(OLD_POINTER_SPACE)),
        private_free_list_old_data_space_(heap_->paged_space(OLD_DATA_SPACE)),
@@ -61,10 +61,10 @@ void SweeperThread::Run() {
   DisallowHandleDereference no_deref;
 
   while (true) {
-    start_sweeping_semaphore_->Wait();
+    start_sweeping_semaphore_.Wait();
 
     if (Acquire_Load(&stop_thread_)) {
-      stop_semaphore_->Signal();
+      stop_semaphore_.Signal();
       return;
     }
 
@@ -74,7 +74,7 @@ void SweeperThread::Run() {
     collector_->SweepInParallel(heap_->old_pointer_space(),
                                 &private_free_list_old_pointer_space_,
                                 &free_list_old_pointer_space_);
-    end_sweeping_semaphore_->Signal();
+    end_sweeping_semaphore_.Signal();
   }
 }
 
@@ -91,18 +91,18 @@ intptr_t SweeperThread::StealMemory(PagedSpace* space) {
 
 void SweeperThread::Stop() {
   Release_Store(&stop_thread_, static_cast<AtomicWord>(true));
-  start_sweeping_semaphore_->Signal();
-  stop_semaphore_->Wait();
+  start_sweeping_semaphore_.Signal();
+  stop_semaphore_.Wait();
   Join();
 }
 
 
 void SweeperThread::StartSweeping() {
-  start_sweeping_semaphore_->Signal();
+  start_sweeping_semaphore_.Signal();
 }
 
 
 void SweeperThread::WaitForSweeperThread() {
-  end_sweeping_semaphore_->Wait();
+  end_sweeping_semaphore_.Wait();
 }
 } }  // namespace v8::internal