| OLD | NEW |
| 1 // Copyright (c) 2009 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2009 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #ifndef CHROME_BROWSER_RENDERER_HOST_RESOURCE_QUEUE_H_ | 5 #ifndef CHROME_BROWSER_RENDERER_HOST_RESOURCE_QUEUE_H_ |
| 6 #define CHROME_BROWSER_RENDERER_HOST_RESOURCE_QUEUE_H_ | 6 #define CHROME_BROWSER_RENDERER_HOST_RESOURCE_QUEUE_H_ |
| 7 #pragma once | 7 #pragma once |
| 8 | 8 |
| 9 #include <map> | 9 // TODO(jam): remove this file when all files have been converted. |
| 10 #include <set> | 10 #include "content/browser/renderer_host/resource_queue.h" |
| 11 | |
| 12 #include "base/basictypes.h" | |
| 13 | |
| 14 namespace net { | |
| 15 class URLRequest; | |
| 16 } // namespace net | |
| 17 | |
| 18 class ResourceDispatcherHostRequestInfo; | |
| 19 struct GlobalRequestID; | |
| 20 | |
| 21 // Makes decisions about delaying or not each net::URLRequest in the queue. | |
| 22 // All methods are called on the IO thread. | |
| 23 class ResourceQueueDelegate { | |
| 24 public: | |
| 25 // Should return true if it wants the |request| to not be started at this | |
| 26 // point. To start the delayed request, ResourceQueue::StartDelayedRequest | |
| 27 // should be used. | |
| 28 virtual bool ShouldDelayRequest( | |
| 29 net::URLRequest* request, | |
| 30 const ResourceDispatcherHostRequestInfo& request_info, | |
| 31 const GlobalRequestID& request_id) = 0; | |
| 32 | |
| 33 // Called just before ResourceQueue shutdown. After that, the delegate | |
| 34 // should not use the ResourceQueue. | |
| 35 virtual void WillShutdownResourceQueue() = 0; | |
| 36 | |
| 37 protected: | |
| 38 virtual ~ResourceQueueDelegate(); | |
| 39 }; | |
| 40 | |
| 41 // Makes it easy to delay starting URL requests until specified conditions are | |
| 42 // met. | |
| 43 class ResourceQueue { | |
| 44 public: | |
| 45 typedef std::set<ResourceQueueDelegate*> DelegateSet; | |
| 46 | |
| 47 // UI THREAD ONLY ------------------------------------------------------------ | |
| 48 | |
| 49 // Construct the queue. You must initialize it using Initialize. | |
| 50 ResourceQueue(); | |
| 51 ~ResourceQueue(); | |
| 52 | |
| 53 // Initialize the queue with set of delegates it should ask for each incoming | |
| 54 // request. | |
| 55 void Initialize(const DelegateSet& delegates); | |
| 56 | |
| 57 // IO THREAD ONLY ------------------------------------------------------------ | |
| 58 | |
| 59 // Must be called before destroying the queue. No other methods can be called | |
| 60 // after that. | |
| 61 void Shutdown(); | |
| 62 | |
| 63 // Takes care to start the |request| after all delegates allow that. If no | |
| 64 // delegate demands delaying the request it will be started immediately. | |
| 65 void AddRequest(net::URLRequest* request, | |
| 66 const ResourceDispatcherHostRequestInfo& request_info); | |
| 67 | |
| 68 // Tells the queue that the net::URLRequest object associated with | |
| 69 // |request_id| is no longer valid. | |
| 70 void RemoveRequest(const GlobalRequestID& request_id); | |
| 71 | |
| 72 // A delegate should call StartDelayedRequest when it wants to allow the | |
| 73 // request to start. If it was the last delegate that demanded the request | |
| 74 // to be delayed, the request will be started. | |
| 75 void StartDelayedRequest(ResourceQueueDelegate* delegate, | |
| 76 const GlobalRequestID& request_id); | |
| 77 | |
| 78 private: | |
| 79 typedef std::map<GlobalRequestID, net::URLRequest*> RequestMap; | |
| 80 typedef std::map<GlobalRequestID, DelegateSet> InterestedDelegatesMap; | |
| 81 | |
| 82 // The registered delegates. Will not change after the queue has been | |
| 83 // initialized. | |
| 84 DelegateSet delegates_; | |
| 85 | |
| 86 // Stores net::URLRequest objects associated with each GlobalRequestID. This | |
| 87 // helps decoupling the queue from ResourceDispatcherHost. | |
| 88 RequestMap requests_; | |
| 89 | |
| 90 // Maps a GlobalRequestID to the set of delegates that want to prevent the | |
| 91 // associated request from starting yet. | |
| 92 InterestedDelegatesMap interested_delegates_; | |
| 93 | |
| 94 // True when we are shutting down. | |
| 95 bool shutdown_; | |
| 96 | |
| 97 DISALLOW_COPY_AND_ASSIGN(ResourceQueue); | |
| 98 }; | |
| 99 | 11 |
| 100 #endif // CHROME_BROWSER_RENDERER_HOST_RESOURCE_QUEUE_H_ | 12 #endif // CHROME_BROWSER_RENDERER_HOST_RESOURCE_QUEUE_H_ |
| OLD | NEW |