src/os/windows/vm/os_windows.cpp

*** 1907,1923 ****
      ::CloseHandle(_semaphore);
    }
  }
  
  void Semaphore::signal(uint count) {
    BOOL ret = ::ReleaseSemaphore(_semaphore, count, NULL);
  
    assert(ret != 0, err_msg("ReleaseSemaphore failed: %d", GetLastError()));
! }
! 
! void Semaphore::signal() {
!   signal(1);
  }
  
  void Semaphore::wait() {
    DWORD ret = ::WaitForSingleObject(_semaphore, INFINITE);
    assert(ret == WAIT_OBJECT_0, err_msg("WaitForSingleObject failed: %d", GetLastError()));
--- 1907,1921 ----
      ::CloseHandle(_semaphore);
    }
  }
  
  void Semaphore::signal(uint count) {
+   if (count > 0) {
      BOOL ret = ::ReleaseSemaphore(_semaphore, count, NULL);
  
      assert(ret != 0, err_msg("ReleaseSemaphore failed: %d", GetLastError()));
!   }
  }
  
  void Semaphore::wait() {
    DWORD ret = ::WaitForSingleObject(_semaphore, INFINITE);
    assert(ret == WAIT_OBJECT_0, err_msg("WaitForSingleObject failed: %d", GetLastError()));