--- old/src/hotspot/os/posix/os_posix.cpp	2018-01-08 16:26:13.242328183 -0500
+++ new/src/hotspot/os/posix/os_posix.cpp	2018-01-08 16:26:12.807607265 -0500
@@ -31,14 +31,8 @@
 #include "utilities/macros.hpp"
 #include "utilities/vmError.hpp"
 
-#ifndef __APPLE__
-// POSIX unamed semaphores are not supported on OS X.
-#include "semaphore_posix.hpp"
-#endif
-
 #include <dlfcn.h>
 #include <pthread.h>
-#include <semaphore.h>
 #include <signal.h>
 #include <sys/mman.h>
 #include <sys/resource.h>
@@ -1499,67 +1493,6 @@
   }
 }
 
-// POSIX unamed semaphores are not supported on OS X.
-#ifndef __APPLE__
-
-PosixSemaphore::PosixSemaphore(uint value) {
-  int ret = sem_init(&_semaphore, 0, value);
-
-  guarantee_with_errno(ret == 0, "Failed to initialize semaphore");
-}
-
-PosixSemaphore::~PosixSemaphore() {
-  sem_destroy(&_semaphore);
-}
-
-void PosixSemaphore::signal(uint count) {
-  for (uint i = 0; i < count; i++) {
-    int ret = sem_post(&_semaphore);
-
-    assert_with_errno(ret == 0, "sem_post failed");
-  }
-}
-
-void PosixSemaphore::wait() {
-  int ret;
-
-  do {
-    ret = sem_wait(&_semaphore);
-  } while (ret != 0 && errno == EINTR);
-
-  assert_with_errno(ret == 0, "sem_wait failed");
-}
-
-bool PosixSemaphore::trywait() {
-  int ret;
-
-  do {
-    ret = sem_trywait(&_semaphore);
-  } while (ret != 0 && errno == EINTR);
-
-  assert_with_errno(ret == 0 || errno == EAGAIN, "trywait failed");
-
-  return ret == 0;
-}
-
-bool PosixSemaphore::timedwait(struct timespec ts) {
-  while (true) {
-    int result = sem_timedwait(&_semaphore, &ts);
-    if (result == 0) {
-      return true;
-    } else if (errno == EINTR) {
-      continue;
-    } else if (errno == ETIMEDOUT) {
-      return false;
-    } else {
-      assert_with_errno(false, "timedwait failed");
-      return false;
-    }
-  }
-}
-
-#endif // __APPLE__
-
 
 // Shared pthread_mutex/cond based PlatformEvent implementation.
 // Not currently usable by Solaris.