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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 CONTENT_BROWSER_RENDERER_HOST_RESOURCE_QUEUE_H_ | 5 #ifndef CONTENT_BROWSER_RENDERER_HOST_RESOURCE_QUEUE_H_ |
6 #define CONTENT_BROWSER_RENDERER_HOST_RESOURCE_QUEUE_H_ | 6 #define CONTENT_BROWSER_RENDERER_HOST_RESOURCE_QUEUE_H_ |
7 #pragma once | 7 #pragma once |
8 | 8 |
9 #include <map> | 9 #include <map> |
10 #include <set> | 10 #include <set> |
11 | 11 |
12 #include "base/basictypes.h" | 12 #include "base/basictypes.h" |
| 13 #include "content/common/content_export.h" |
13 | 14 |
14 namespace net { | 15 namespace net { |
15 class URLRequest; | 16 class URLRequest; |
16 } // namespace net | 17 } // namespace net |
17 | 18 |
18 class ResourceDispatcherHostRequestInfo; | 19 class ResourceDispatcherHostRequestInfo; |
19 class ResourceQueue; | 20 class ResourceQueue; |
20 struct GlobalRequestID; | 21 struct GlobalRequestID; |
21 | 22 |
22 // Makes decisions about delaying or not each net::URLRequest in the queue. | 23 // Makes decisions about delaying or not each net::URLRequest in the queue. |
23 // All methods are called on the IO thread. | 24 // All methods are called on the IO thread. |
24 class ResourceQueueDelegate { | 25 class ResourceQueueDelegate { |
25 public: | 26 public: |
26 // Gives the delegate a pointer to the queue object. | 27 // Gives the delegate a pointer to the queue object. |
27 virtual void Initialize(ResourceQueue* resource_queue) = 0; | 28 virtual void Initialize(ResourceQueue* resource_queue) = 0; |
28 | 29 |
29 // Should return true if it wants the |request| to not be started at this | 30 // Should return true if it wants the |request| to not be started at this |
30 // point. To start the delayed request, ResourceQueue::StartDelayedRequest | 31 // point. To start the delayed request, ResourceQueue::StartDelayedRequest |
31 // should be used. | 32 // should be used. |
32 virtual bool ShouldDelayRequest( | 33 virtual bool ShouldDelayRequest( |
33 net::URLRequest* request, | 34 net::URLRequest* request, |
34 const ResourceDispatcherHostRequestInfo& request_info, | 35 const ResourceDispatcherHostRequestInfo& request_info, |
35 const GlobalRequestID& request_id) = 0; | 36 const GlobalRequestID& request_id) = 0; |
36 | 37 |
37 // Called just before ResourceQueue shutdown. After that, the delegate | 38 // Called just before ResourceQueue shutdown. After that, the delegate |
38 // should not use the ResourceQueue. | 39 // should not use the ResourceQueue. |
39 virtual void WillShutdownResourceQueue() = 0; | 40 virtual void WillShutdownResourceQueue() = 0; |
40 | 41 |
41 protected: | 42 protected: |
42 virtual ~ResourceQueueDelegate(); | 43 CONTENT_EXPORT virtual ~ResourceQueueDelegate(); |
43 }; | 44 }; |
44 | 45 |
45 // Makes it easy to delay starting URL requests until specified conditions are | 46 // Makes it easy to delay starting URL requests until specified conditions are |
46 // met. | 47 // met. |
47 class ResourceQueue { | 48 class ResourceQueue { |
48 public: | 49 public: |
49 typedef std::set<ResourceQueueDelegate*> DelegateSet; | 50 typedef std::set<ResourceQueueDelegate*> DelegateSet; |
50 | 51 |
51 // UI THREAD ONLY ------------------------------------------------------------ | 52 // UI THREAD ONLY ------------------------------------------------------------ |
52 | 53 |
(...skipping 16 matching lines...) Expand all Loading... |
69 void AddRequest(net::URLRequest* request, | 70 void AddRequest(net::URLRequest* request, |
70 const ResourceDispatcherHostRequestInfo& request_info); | 71 const ResourceDispatcherHostRequestInfo& request_info); |
71 | 72 |
72 // Tells the queue that the net::URLRequest object associated with | 73 // Tells the queue that the net::URLRequest object associated with |
73 // |request_id| is no longer valid. | 74 // |request_id| is no longer valid. |
74 void RemoveRequest(const GlobalRequestID& request_id); | 75 void RemoveRequest(const GlobalRequestID& request_id); |
75 | 76 |
76 // A delegate should call StartDelayedRequest when it wants to allow the | 77 // A delegate should call StartDelayedRequest when it wants to allow the |
77 // request to start. If it was the last delegate that demanded the request | 78 // request to start. If it was the last delegate that demanded the request |
78 // to be delayed, the request will be started. | 79 // to be delayed, the request will be started. |
79 void StartDelayedRequest(ResourceQueueDelegate* delegate, | 80 CONTENT_EXPORT void StartDelayedRequest(ResourceQueueDelegate* delegate, |
80 const GlobalRequestID& request_id); | 81 const GlobalRequestID& request_id); |
81 | 82 |
82 private: | 83 private: |
83 typedef std::map<GlobalRequestID, net::URLRequest*> RequestMap; | 84 typedef std::map<GlobalRequestID, net::URLRequest*> RequestMap; |
84 typedef std::map<GlobalRequestID, DelegateSet> InterestedDelegatesMap; | 85 typedef std::map<GlobalRequestID, DelegateSet> InterestedDelegatesMap; |
85 | 86 |
86 // The registered delegates. Will not change after the queue has been | 87 // The registered delegates. Will not change after the queue has been |
87 // initialized. | 88 // initialized. |
88 DelegateSet delegates_; | 89 DelegateSet delegates_; |
89 | 90 |
90 // Stores net::URLRequest objects associated with each GlobalRequestID. This | 91 // Stores net::URLRequest objects associated with each GlobalRequestID. This |
91 // helps decoupling the queue from ResourceDispatcherHost. | 92 // helps decoupling the queue from ResourceDispatcherHost. |
92 RequestMap requests_; | 93 RequestMap requests_; |
93 | 94 |
94 // Maps a GlobalRequestID to the set of delegates that want to prevent the | 95 // Maps a GlobalRequestID to the set of delegates that want to prevent the |
95 // associated request from starting yet. | 96 // associated request from starting yet. |
96 InterestedDelegatesMap interested_delegates_; | 97 InterestedDelegatesMap interested_delegates_; |
97 | 98 |
98 // True when we are shutting down. | 99 // True when we are shutting down. |
99 bool shutdown_; | 100 bool shutdown_; |
100 | 101 |
101 DISALLOW_COPY_AND_ASSIGN(ResourceQueue); | 102 DISALLOW_COPY_AND_ASSIGN(ResourceQueue); |
102 }; | 103 }; |
103 | 104 |
104 #endif // CONTENT_BROWSER_RENDERER_HOST_RESOURCE_QUEUE_H_ | 105 #endif // CONTENT_BROWSER_RENDERER_HOST_RESOURCE_QUEUE_H_ |
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