Chromium Code Reviews
chromiumcodereview-hr@appspot.gserviceaccount.com (chromiumcodereview-hr) | Please choose your nickname with Settings | Help | Chromium Project | Gerrit Changes | Sign out
(60)

Side by Side Diff: components/network_hints/renderer/renderer_dns_prefetch.h

Issue 848303005: Renamed the dns_prefetch component to network_predictor (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Rebased Created 5 years, 10 months ago
Use n/p to move between diff chunks; N/P to move between comments. Draft comments are only viewable by you.
Jump to:
View unified diff | Download patch
OLDNEW
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 RendererDnsPrefetch 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 COMPONENTS_DNS_PREFETCH_RENDERER_RENDERER_NET_PREDICTOR_H_ 21 #ifndef COMPONENTS_NETWORK_HINTS_RENDERER_RENDERER_DNS_PREFETCH_H_
22 #define COMPONENTS_DNS_PREFETCH_RENDERER_RENDERER_NET_PREDICTOR_H_ 22 #define COMPONENTS_NETWORK_HINTS_RENDERER_RENDERER_DNS_PREFETCH_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 "components/dns_prefetch/renderer/predictor_queue.h" 29 #include "components/network_hints/renderer/dns_prefetch_queue.h"
30 30
31 namespace dns_prefetch { 31 namespace network_hints {
32 32
33 class RendererNetPredictor { 33 // An internal interface to the network_hints component for efficiently sending
34 // DNS prefetch requests to the net stack.
35 class RendererDnsPrefetch {
34 public: 36 public:
35 RendererNetPredictor(); 37 RendererDnsPrefetch();
36 ~RendererNetPredictor(); 38 ~RendererDnsPrefetch();
37 39
38 // Push a name into the queue to be resolved. 40 // Push a name into the queue to be resolved.
39 void Resolve(const char* name, size_t length); 41 void Resolve(const char* name, size_t length);
40 42
41 // SubmitHosts processes the buffered names, and submits them for DNS 43 // SubmitHosts processes the buffered names, and submits them for DNS
42 // prefetching. 44 // prefetching.
43 // Note that browser process may decide which names should be looked up (to 45 // Note that browser process may decide which names should be looked up (to
44 // pre-warm the cache) based on what has been (or not been) looked up 46 // pre-warm the cache) based on what has been (or not been) looked up
45 // recently. 47 // recently.
46 // If sending for DNS lookup is incomplete (queue is not empty, or not all 48 // If sending for DNS lookup is incomplete (queue is not empty, or not all
(...skipping 43 matching lines...) Expand 10 before | Expand all | Expand 10 after
90 // Cache a tally of the count of names that haven't yet been sent 92 // Cache a tally of the count of names that haven't yet been sent
91 // for DNS pre-fetching. Note that we *could* recalculate this 93 // for DNS pre-fetching. Note that we *could* recalculate this
92 // count by iterating over domain_map_, looking for even values. 94 // count by iterating over domain_map_, looking for even values.
93 size_t new_name_count_; 95 size_t new_name_count_;
94 96
95 // We have some metrics to examine performance. We might use 97 // We have some metrics to examine performance. We might use
96 // these metrics to modify buffer counts etc. some day. 98 // these metrics to modify buffer counts etc. some day.
97 int buffer_full_discard_count_; 99 int buffer_full_discard_count_;
98 int numeric_ip_discard_count_; 100 int numeric_ip_discard_count_;
99 101
100 base::WeakPtrFactory<RendererNetPredictor> weak_factory_; 102 base::WeakPtrFactory<RendererDnsPrefetch> weak_factory_;
101 103
102 DISALLOW_COPY_AND_ASSIGN(RendererNetPredictor); 104 DISALLOW_COPY_AND_ASSIGN(RendererDnsPrefetch);
103 }; // class RendererNetPredictor 105 }; // class RendererDnsPrefetch
104 106
105 } // namespace dns_prefetch 107 } // namespace network_hints
106 108
107 #endif // COMPONENTS_DNS_PREFETCH_RENDERER_RENDERER_NET_PREDICTOR_H_ 109 #endif // COMPONENTS_NETWORK_HINTS_RENDERER_RENDERER_DNS_PREFETCH_H_
OLDNEW

Powered by Google App Engine
This is Rietveld 408576698