1// Copyright (c) 2013 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_PROCESS_SINGLETON_STARTUP_LOCK_H_ 6#define CHROME_BROWSER_PROCESS_SINGLETON_STARTUP_LOCK_H_ 7 8#include <set> 9#include <utility> 10#include <vector> 11 12#include "base/basictypes.h" 13#include "base/command_line.h" 14#include "base/files/file_path.h" 15#include "base/threading/non_thread_safe.h" 16#include "chrome/browser/process_singleton.h" 17 18// Provides a ProcessSingleton::NotificationCallback that can queue up 19// command-line invocations during startup and execute them when startup 20// completes. 21// 22// The object starts in a locked state. |Unlock()| must be called 23// when the process is prepared to handle command-line invocations. 24// 25// Once unlocked, notifications are forwarded to a wrapped NotificationCallback. 26class ProcessSingletonStartupLock : public base::NonThreadSafe { 27 public: 28 explicit ProcessSingletonStartupLock( 29 const ProcessSingleton::NotificationCallback& original_callback); 30 ~ProcessSingletonStartupLock(); 31 32 // Returns the ProcessSingleton::NotificationCallback. 33 // The callback is only valid during the lifetime of the 34 // ProcessSingletonStartupLock instance. 35 ProcessSingleton::NotificationCallback AsNotificationCallback(); 36 37 // Executes previously queued command-line invocations and allows future 38 // invocations to be executed immediately. 39 void Unlock(); 40 41 bool locked() { return locked_; } 42 43 private: 44 typedef std::pair<CommandLine::StringVector, base::FilePath> 45 DelayedStartupMessage; 46 47 bool NotificationCallbackImpl(const CommandLine& command_line, 48 const base::FilePath& current_directory); 49 50 bool locked_; 51 std::vector<DelayedStartupMessage> saved_startup_messages_; 52 ProcessSingleton::NotificationCallback original_callback_; 53 54 DISALLOW_COPY_AND_ASSIGN(ProcessSingletonStartupLock); 55}; 56 57#endif // CHROME_BROWSER_PROCESS_SINGLETON_STARTUP_LOCK_H_ 58