rlz/win/lib/lib_mutex.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "rlz/win/lib/lib_mutex.h"
   6
   7 #include <windows.h>
   8 #include "base/win/windows_version.h"
   9
  10 namespace {
  11
  12 const long kTimeoutMs = 5000L;
  13 const wchar_t kMutexName[] = L"{A946A6A9-917E-4949-B9BC-6BADA8C7FD63}";
  14
  15 }  // namespace
  16
  17 namespace rlz_lib {
  18
  19 LibMutex::LibMutex() : acquired_(false), mutex_(NULL) {
  20   mutex_ = CreateMutex(NULL, FALSE, kMutexName);
  21   if (mutex_)
  22     acquired_ = (WAIT_OBJECT_0 == WaitForSingleObject(mutex_, kTimeoutMs));
  23 }
  24
  25 LibMutex::~LibMutex() {
  26   if (acquired_)
  27     ReleaseMutex(mutex_);
  28   if (mutex_)
  29     CloseHandle(mutex_);
  30 }
  31
  32 }  // namespace rlz_lib