[NaCl SDK} Add EventListener and EventEmitter to support epoll.

native_client_sdk/src/libraries/nacl_io/kernel_wrap_win.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // The entire file is wrapped in this #if. We do this so this .cc file can be
 // compiled, even on a non-Windows build.
 #if defined(WIN32)
 
 #include "nacl_io/kernel_wrap.h"
 #include <errno.h>
@@ skipping 289 matching lines @@
 
 int _real_rmdir(const char* pathname) {
   return ENOSYS;
 }
 
 int _real_write(int fd, const void *buf, size_t count, size_t *nwrote) {
   *nwrote = count;
   return 0;
 }
 
+#define USECS_FROM_WIN_TO_TO_UNIX_EPOCH 11644473600000LL
+uint64_t usec_since_epoch() {
+  FILETIME ft;
+  ULARGE_INTEGER ularge;
+  GetSystemTimeAsFileTime(&ft);
+
+  ularge.LowPart = ft.dwLowDateTime;
+  ularge.HighPart = ft.dwHighDateTime;
+
+  // Truncate to usec resolution.
+  return usecs = ularge.QuadPart / 10;
+}
+
 // Do nothing for Windows, we replace the library at link time.
 void kernel_wrap_init() {
 }
 EXTERN_C_END
 
 #endif   // defined(WIN32)