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 #ifndef CHROME_BROWSER_CHROMEOS_LOGIN_OWNERSHIP_STATUS_CHECKER_H_ 6 #define CHROME_BROWSER_CHROMEOS_LOGIN_OWNERSHIP_STATUS_CHECKER_H_ 7 #pragma once 8 9 #include "base/basictypes.h" 10 #include "base/callback.h" 11 #include "base/memory/ref_counted.h" 12 #include "base/memory/scoped_ptr.h" 13 #include "base/message_loop_proxy.h" 14 #include "chrome/browser/chromeos/login/ownership_service.h" 15 16 namespace chromeos { 17 18 // A helper that does ownership checking on the file thread and reports back the 19 // result on whatever thread the call was made on. The pattern is to construct 20 // a checker, passing in the callback. Once the check is done, the callback will 21 // be invoked with the result. In order to cancel the callback, just destroy the 22 // checker object. 23 class OwnershipStatusChecker { 24 public: 25 // Callback function type. The status code is guaranteed to be different from 26 // OWNERSHIP_UNKNOWN. 27 typedef Callback1<OwnershipService::Status>::Type Callback; 28 29 explicit OwnershipStatusChecker(Callback* callback); 30 ~OwnershipStatusChecker(); 31 32 private: 33 // The refcounted core that handles the thread switching. 34 class Core : public base::RefCountedThreadSafe<Core> { 35 public: 36 explicit Core(Callback* callback); 37 38 // Starts the check. 39 void Check(); 40 41 // Cancels the outstanding callback (if applicable). 42 void Cancel(); 43 44 private: 45 void CheckOnFileThread(); 46 void ReportResult(OwnershipService::Status status); 47 48 scoped_ptr<Callback> callback_; 49 scoped_refptr<base::MessageLoopProxy> origin_loop_; 50 51 DISALLOW_COPY_AND_ASSIGN(Core); 52 }; 53 54 scoped_refptr<Core> core_; 55 56 DISALLOW_COPY_AND_ASSIGN(OwnershipStatusChecker); 57 }; 58 59 } // namespace chromeos 60 61 #endif // CHROME_BROWSER_CHROMEOS_LOGIN_OWNERSHIP_STATUS_CHECKER_H_ 62
