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Side by Side Diff: components/predictor/renderer/renderer_net_predictor.h

Issue 644123002: Componentize renderer side of DNS prefetching. (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: fix IPC message Created 6 years, 2 months ago
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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. 1 // Copyright (c) 2011 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 // A RendererNetPredictor instance is maintained for each RenderThread. 5 // A RendererNetPredictor instance is maintained for each RenderThread.
6 // URL strings are typically added to the embedded queue during rendering. 6 // URL strings are typically added to the embedded queue during rendering.
7 // The first addition to the queue (transitioning from empty to having 7 // The first addition to the queue (transitioning from empty to having
8 // some names) causes a processing task to be added to the Renderer Thread. 8 // some names) causes a processing task to be added to the Renderer Thread.
9 // The processing task gathers all buffered names, and send them via IPC 9 // The processing task gathers all buffered names, and send them via IPC
10 // to the browser, so that DNS lookups can be performed before the user attempts 10 // to the browser, so that DNS lookups can be performed before the user attempts
11 // to traverse a link. 11 // to traverse a link.
12 // This class removed some duplicates, and discards numeric IP addresss 12 // This class removed some duplicates, and discards numeric IP addresss
13 // (which wouldn't looked up in DNS anyway). 13 // (which wouldn't looked up in DNS anyway).
14 // To limit the time during the processing task (and avoid stalling the Render 14 // To limit the time during the processing task (and avoid stalling the Render
15 // thread), several limits are placed on how much of the queue to process. 15 // thread), several limits are placed on how much of the queue to process.
16 // If the processing task is not able to completely empty the queue, it 16 // If the processing task is not able to completely empty the queue, it
17 // schedules a future continuation of the task, and keeps the map of already 17 // schedules a future continuation of the task, and keeps the map of already
18 // sent names. If the entire queue is processed, then the list of "sent names" 18 // sent names. If the entire queue is processed, then the list of "sent names"
19 // is cleared so that future gatherings might again pass along the same names. 19 // is cleared so that future gatherings might again pass along the same names.
20 20
21 #ifndef CHROME_RENDERER_NET_RENDERER_NET_PREDICTOR_H_ 21 #ifndef COMPONENTS_PREDICTOR_RENDERER_RENDERER_NET_PREDICTOR_H_
22 #define CHROME_RENDERER_NET_RENDERER_NET_PREDICTOR_H_ 22 #define COMPONENTS_PREDICTOR_RENDERER_RENDERER_NET_PREDICTOR_H_
23 23
24 #include <map> 24 #include <map>
25 #include <string> 25 #include <string>
26 26
27 #include "base/basictypes.h" 27 #include "base/basictypes.h"
28 #include "base/memory/weak_ptr.h" 28 #include "base/memory/weak_ptr.h"
29 #include "chrome/renderer/net/predictor_queue.h" 29 #include "components/predictor/renderer/predictor_queue.h"
30 30
31 class RendererNetPredictor { 31 class RendererNetPredictor {
32 public: 32 public:
33 RendererNetPredictor(); 33 RendererNetPredictor();
34 ~RendererNetPredictor(); 34 ~RendererNetPredictor();
35 35
36 // Push a name into the queue to be resolved. 36 // Push a name into the queue to be resolved.
37 void Resolve(const char* name, size_t length); 37 void Resolve(const char* name, size_t length);
38 38
39 // SubmitHosts processes the buffered names, and submits them for DNS 39 // SubmitHosts processes the buffered names, and submits them for DNS
(...skipping 53 matching lines...) Expand 10 before | Expand all | Expand 10 after
93 // We have some metrics to examine performance. We might use 93 // We have some metrics to examine performance. We might use
94 // these metrics to modify buffer counts etc. some day. 94 // these metrics to modify buffer counts etc. some day.
95 int buffer_full_discard_count_; 95 int buffer_full_discard_count_;
96 int numeric_ip_discard_count_; 96 int numeric_ip_discard_count_;
97 97
98 base::WeakPtrFactory<RendererNetPredictor> weak_factory_; 98 base::WeakPtrFactory<RendererNetPredictor> weak_factory_;
99 99
100 DISALLOW_COPY_AND_ASSIGN(RendererNetPredictor); 100 DISALLOW_COPY_AND_ASSIGN(RendererNetPredictor);
101 }; // class RendererNetPredictor 101 }; // class RendererNetPredictor
102 102
103 #endif // CHROME_RENDERER_NET_RENDERER_NET_PREDICTOR_H_ 103 #endif // COMPONENTS_PREDICTOR_RENDERER_RENDERER_NET_PREDICTOR_H_
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