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      1 // Copyright (c) 2011 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 "chrome/browser/browser_util_win.h"
      6 
      7 #include <windows.h>
      8 
      9 #include <algorithm>
     10 #include <string>
     11 
     12 #include "base/base_paths.h"
     13 #include "base/files/file_path.h"
     14 #include "base/path_service.h"
     15 
     16 namespace browser_util {
     17 
     18 bool IsBrowserAlreadyRunning() {
     19   static HANDLE handle = NULL;
     20   base::FilePath exe_path;
     21   PathService::Get(base::FILE_EXE, &exe_path);
     22   std::wstring exe = exe_path.value();
     23   std::replace(exe.begin(), exe.end(), '\\', '!');
     24   std::transform(exe.begin(), exe.end(), exe.begin(), tolower);
     25   exe = L"Global\\" + exe;
     26   if (handle != NULL)
     27     CloseHandle(handle);
     28   handle = CreateEvent(NULL, TRUE, TRUE, exe.c_str());
     29   int error = GetLastError();
     30   return (error == ERROR_ALREADY_EXISTS || error == ERROR_ACCESS_DENIED);
     31 }
     32 
     33 }  // namespace browser_util
     34