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 CONTENT_BROWSER_BROWSER_THREAD_IMPL_H_ 6 #define CONTENT_BROWSER_BROWSER_THREAD_IMPL_H_ 7 8 #include "base/threading/thread.h" 9 #include "content/common/content_export.h" 10 #include "content/public/browser/browser_thread.h" 11 12 namespace content { 13 14 class CONTENT_EXPORT BrowserThreadImpl : public BrowserThread, 15 public base::Thread { 16 public: 17 // Construct a BrowserThreadImpl with the supplied identifier. It is an error 18 // to construct a BrowserThreadImpl that already exists. 19 explicit BrowserThreadImpl(BrowserThread::ID identifier); 20 21 // Special constructor for the main (UI) thread and unittests. If a 22 // |message_loop| is provied, we use a dummy thread here since the main 23 // thread already exists. 24 BrowserThreadImpl(BrowserThread::ID identifier, 25 base::MessageLoop* message_loop); 26 virtual ~BrowserThreadImpl(); 27 28 static void ShutdownThreadPool(); 29 30 protected: 31 virtual void Init() OVERRIDE; 32 virtual void Run(base::MessageLoop* message_loop) OVERRIDE; 33 virtual void CleanUp() OVERRIDE; 34 35 private: 36 // We implement all the functionality of the public BrowserThread 37 // functions, but state is stored in the BrowserThreadImpl to keep 38 // the API cleaner. Therefore make BrowserThread a friend class. 39 friend class BrowserThread; 40 41 // The following are unique function names that makes it possible to tell 42 // the thread id from the callstack alone in crash dumps. 43 void UIThreadRun(base::MessageLoop* message_loop); 44 void DBThreadRun(base::MessageLoop* message_loop); 45 void FileThreadRun(base::MessageLoop* message_loop); 46 void FileUserBlockingThreadRun(base::MessageLoop* message_loop); 47 void ProcessLauncherThreadRun(base::MessageLoop* message_loop); 48 void CacheThreadRun(base::MessageLoop* message_loop); 49 void IOThreadRun(base::MessageLoop* message_loop); 50 51 static bool PostTaskHelper( 52 BrowserThread::ID identifier, 53 const tracked_objects::Location& from_here, 54 const base::Closure& task, 55 base::TimeDelta delay, 56 bool nestable); 57 58 // Common initialization code for the constructors. 59 void Initialize(); 60 61 // For testing. 62 friend class ContentTestSuiteBaseListener; 63 friend class TestBrowserThreadBundle; 64 static void FlushThreadPoolHelperForTesting(); 65 66 // The identifier of this thread. Only one thread can exist with a given 67 // identifier at a given time. 68 ID identifier_; 69 }; 70 71 } // namespace content 72 73 #endif // CONTENT_BROWSER_BROWSER_THREAD_IMPL_H_ 74
