src/os/windows/vm/os_windows.cpp

*** 61,70 ****
--- 61,71 ----
  #include "runtime/stubRoutines.hpp"
  #include "runtime/thread.inline.hpp"
  #include "runtime/threadCritical.hpp"
  #include "runtime/timer.hpp"
  #include "runtime/vm_version.hpp"
+ #include "semaphore_windows.hpp"
  #include "services/attachListener.hpp"
  #include "services/memTracker.hpp"
  #include "services/runtimeService.hpp"
  #include "utilities/decoder.hpp"
  #include "utilities/defaultStream.hpp"
*** 1893,1902 ****
--- 1894,1929 ----
      error = errno;
    }
    return (int)error;
  }
  
+ WindowsSemaphore::WindowsSemaphore(uint value) {
+   _semaphore = ::CreateSemaphore(NULL, value, LONG_MAX, NULL);
+ 
+   guarantee(_semaphore != NULL, err_msg("CreateSemaphore failed with error code: %lu", GetLastError()));
+ }
+ 
+ WindowsSemaphore::~WindowsSemaphore() {
+   if (_semaphore != NULL) {
+     ::CloseHandle(_semaphore);
+   }
+ }
+ 
+ void WindowsSemaphore::signal(uint count) {
+   if (count > 0) {
+     BOOL ret = ::ReleaseSemaphore(_semaphore, count, NULL);
+ 
+     assert(ret != 0, err_msg("ReleaseSemaphore failed with error code: %lu", GetLastError()));
+   }
+ }
+ 
+ void WindowsSemaphore::wait() {
+   DWORD ret = ::WaitForSingleObject(_semaphore, INFINITE);
+   assert(ret != WAIT_FAILED,   err_msg("WaitForSingleObject failed with error code: %lu", GetLastError()));
+   assert(ret == WAIT_OBJECT_0, err_msg("WaitForSingleObject failed with return value: %lu", ret));
+ }
+ 
  // sun.misc.Signal
  // NOTE that this is a workaround for an apparent kernel bug where if
  // a signal handler for SIGBREAK is installed then that signal handler
  // takes priority over the console control handler for CTRL_CLOSE_EVENT.
  // See bug 4416763.