Cleanup common POSIX functionality.

src/platform-macos.cc

 // 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 634 matching lines @@
   return pthread_getspecific(pthread_key);
 }
 
 
 void Thread::SetThreadLocal(LocalStorageKey key, void* value) {
   pthread_key_t pthread_key = static_cast<pthread_key_t>(key);
   pthread_setspecific(pthread_key, value);
 }
 
 
-void Thread::YieldCPU() {
-  sched_yield();
-}
-
-
-class MacOSMutex : public Mutex {
- public:
-  MacOSMutex() {
-    pthread_mutexattr_t attr;
-    pthread_mutexattr_init(&attr);
-    pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
-    pthread_mutex_init(&mutex_, &attr);

[Dmitry Lomov (no reviews), 2013/07/11 10:52:16]

Hmm MacOS mutex did not have pthread_mutexattr_destroy before, but it should be
fine.

[Benedikt Meurer, 2013/07/11 10:58:45]

Yeah, it's currently a no-op on OS X, but that might change in the future, so we
should do proper cleanup.

-  }
-
-  virtual ~MacOSMutex() { pthread_mutex_destroy(&mutex_); }
-
-  virtual int Lock() { return pthread_mutex_lock(&mutex_); }
-  virtual int Unlock() { return pthread_mutex_unlock(&mutex_); }
-
-  virtual bool TryLock() {
-    int result = pthread_mutex_trylock(&mutex_);
-    // Return false if the lock is busy and locking failed.
-    if (result == EBUSY) {
-      return false;
-    }
-    ASSERT(result == 0);  // Verify no other errors.
-    return true;
-  }
-
- private:
-  pthread_mutex_t mutex_;
-};
-
-
-Mutex* OS::CreateMutex() {
-  return new MacOSMutex();
-}
-
-
 class MacOSSemaphore : public Semaphore {
  public:
   explicit MacOSSemaphore(int count) {
     int r;
     r = semaphore_create(mach_task_self(),
                          &semaphore_,
                          SYNC_POLICY_FIFO,
                          count);
     ASSERT(r == KERN_SUCCESS);
   }
@@ skipping 41 matching lines @@
   limit_mutex = CreateMutex();
 }
 
 
 void OS::TearDown() {
   delete limit_mutex;
 }
 
 
 } }  // namespace v8::internal