|  | // 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. | 
|  |  | 
|  | #ifndef BASE_GUID_H_ | 
|  | #define BASE_GUID_H_ | 
|  |  | 
|  | #include <string> | 
|  |  | 
|  | #include "base/base_export.h" | 
|  | #include "base/basictypes.h" | 
|  | #include "build/build_config.h" | 
|  |  | 
|  | namespace base { | 
|  |  | 
|  | // Generate a 128-bit random GUID of the form: "%08X-%04X-%04X-%04X-%012llX". | 
|  | // If GUID generation fails an empty string is returned. | 
|  | // The POSIX implementation uses pseudo random number generation to create | 
|  | // the GUID.  The Windows implementation uses system services. | 
|  | std::string GenerateGUID(); | 
|  |  | 
|  | #if defined(OS_POSIX) | 
|  | // For unit testing purposes only.  Do not use outside of tests. | 
|  | std::string RandomDataToGUIDString(const uint64 bytes[2]); | 
|  | #endif | 
|  |  | 
|  | }  // namespace base | 
|  |  | 
|  | #endif  // BASE_GUID_H_ |