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 #ifndef CHROME_BROWSER_SIGNIN_SIGNIN_NAMES_IO_THREAD_H_ 6 #define CHROME_BROWSER_SIGNIN_SIGNIN_NAMES_IO_THREAD_H_ 7 8 #include <set> 9 10 #include "base/basictypes.h" 11 #include "base/memory/ref_counted.h" 12 #include "base/memory/scoped_ptr.h" 13 #include "base/strings/string16.h" 14 #include "content/public/browser/notification_observer.h" 15 #include "content/public/browser/notification_registrar.h" 16 17 namespace content { 18 class NotificationDetails; 19 class NotificationSource; 20 } 21 22 23 // This class provides access to a list of email addresses for all profiles 24 // connected to a Google account, from the IO thread. The main purpose of 25 // this is to be a member of the ProfileIOData structure to allow access to 26 // the list of email addresses, and is used by the one-click sign in code to 27 // know which Google accounts are already in use. 28 // 29 // Instance of this class are created and initialized on the UI 30 // thread as part of the creation of ProfileIOData, and destroyed along with 31 // ProfileIOData. 32 class SigninNamesOnIOThread : public content::NotificationObserver { 33 public: 34 typedef std::set<base::string16> EmailSet; 35 36 // Objects should only be created on UI thread. 37 SigninNamesOnIOThread(); 38 virtual ~SigninNamesOnIOThread(); 39 40 // Gets the set of email addresses of connected profiles. This method should 41 // only be called on the IO thread. 42 const EmailSet& GetEmails() const; 43 44 // Releases all resource held by object. Once released, GetEmails() no 45 // longer works. 46 void ReleaseResourcesOnUIThread(); 47 48 private: 49 // content::NotificationObserver 50 virtual void Observe(int type, 51 const content::NotificationSource& source, 52 const content::NotificationDetails& details) OVERRIDE; 53 54 // Checks whether the current thread is the IO thread. 55 void CheckOnIOThread() const; 56 57 // Checks whether the current thread is the UI thread. 58 void CheckOnUIThread() const; 59 60 // Posts a task to the I/O thread to add or remove the email address from 61 // the set. 62 void PostTaskToIOThread(int type, const base::string16& email); 63 64 // Updates the email set on the I/O thread. Protected for testing. 65 void UpdateOnIOThread(int type, const base::string16& email); 66 67 scoped_ptr<content::NotificationRegistrar> registrar_; 68 EmailSet emails_; 69 70 DISALLOW_COPY_AND_ASSIGN(SigninNamesOnIOThread); 71 }; 72 73 #endif // CHROME_BROWSER_SIGNIN_SIGNIN_NAMES_IO_THREAD_H_ 74