Cleanup Semaphore class.

test/cctest/test-lockers.cc

 // Copyright 2007-2011 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 111 matching lines @@
                               "}"
                               "fib(10)");
   CHECK(v->IsNumber());
   CHECK_EQ(55, static_cast<int>(v->NumberValue()));
 }
 
 class JoinableThread {
  public:
   explicit JoinableThread(const char* name)
     : name_(name),
-      semaphore_(i::OS::CreateSemaphore(0)),
+      semaphore_(0),
       thread_(this) {
   }
 
-  virtual ~JoinableThread() {
-    delete semaphore_;
-  }
+  virtual ~JoinableThread() {}
 
   void Start() {
     thread_.Start();
   }
 
   void Join() {
-    semaphore_->Wait();
+    semaphore_.Wait();
   }
 
   virtual void Run() = 0;
 
  private:
   class ThreadWithSemaphore : public i::Thread {
    public:
     explicit ThreadWithSemaphore(JoinableThread* joinable_thread)
       : Thread(joinable_thread->name_),
         joinable_thread_(joinable_thread) {
     }
 
     virtual void Run() {
       joinable_thread_->Run();
-      joinable_thread_->semaphore_->Signal();
+      joinable_thread_->semaphore_.Signal();
     }
 
    private:
     JoinableThread* joinable_thread_;
   };
 
   const char* name_;
-  i::Semaphore* semaphore_;
+  i::Semaphore semaphore_;
   ThreadWithSemaphore thread_;
 
   friend class ThreadWithSemaphore;
 
   DISALLOW_COPY_AND_ASSIGN(JoinableThread);
 };
 
 
 class IsolateLockingThreadWithLocalContext : public JoinableThread {
  public:
@@ skipping 554 matching lines @@
                                           kSimpleExtensionSource));
   const char* extension_names[] = { "test0", "test1",
                                     "test2", "test3", "test4",
                                     "test5", "test6", "test7" };
   i::List<JoinableThread*> threads(kNThreads);
   for (int i = 0; i < kNThreads; i++) {
     threads.Add(new IsolateGenesisThread(8, extension_names));
   }
   StartJoinAndDeleteThreads(threads);
 }