Use LockFile/UnlockFile for Settings to port to Windows

util/misc/uuid.h

 // Copyright 2014 The Crashpad Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
@@ skipping 66 matching lines @@
   //! \brief Formats the %UUID per RFC 4122 §3.
   //!
   //! \return A string of the form `"00112233-4455-6677-8899-aabbccddeeff"`.
   std::string ToString() const;
 
 #if defined(OS_WIN) || DOXYGEN
   //! \brief The same as ToString, but returned as a string16.
   base::string16 ToString16() const;
 #endif  // OS_WIN
 
+  //! \brief Uses a standard system facility to generate a new UUID.
+  static bool GenerateFromSystem(UUID* into);

[Mark Mentovai, 2015/04/01 21:15:19]

Thank you for doing this! It’s been on my list catch-up cleanups to do.

I don’t see why this should be a static method. We should have a non-static
InitializeWithNew() or something that does this.

We may also want a constructor mode that does InitializeWithNew() instead of
giving a zero UUID.

[scottmg, 2015/04/01 21:51:37]

Done. I didn't add the constructor mode as UuidCreate has a failure mode on
Windows, so the caller should deal with that.

+
   // These fields are laid out according to RFC 4122 §4.1.2.
   uint32_t data_1;
   uint16_t data_2;
   uint16_t data_3;
   uint8_t data_4[2];
   uint8_t data_5[6];
 };
 
 }  // namespace crashpad
 
 #endif  // CRASHPAD_UTIL_MISC_UUID_H_