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Side by Side Diff: net/dns/host_cache.cc

Issue 266243004: Clang format slam. Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: Created 6 years, 7 months ago
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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 1 // Copyright (c) 2012 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 #include "net/dns/host_cache.h" 5 #include "net/dns/host_cache.h"
6 6
7 #include "base/logging.h" 7 #include "base/logging.h"
8 #include "base/metrics/field_trial.h" 8 #include "base/metrics/field_trial.h"
9 #include "base/metrics/histogram.h" 9 #include "base/metrics/histogram.h"
10 #include "base/strings/string_number_conversions.h" 10 #include "base/strings/string_number_conversions.h"
11 #include "net/base/net_errors.h" 11 #include "net/base/net_errors.h"
12 12
13 namespace net { 13 namespace net {
14 14
15 //----------------------------------------------------------------------------- 15 //-----------------------------------------------------------------------------
16 16
17 HostCache::Entry::Entry(int error, const AddressList& addrlist, 17 HostCache::Entry::Entry(int error,
18 const AddressList& addrlist,
18 base::TimeDelta ttl) 19 base::TimeDelta ttl)
19 : error(error), 20 : error(error), addrlist(addrlist), ttl(ttl) {
20 addrlist(addrlist),
21 ttl(ttl) {
22 DCHECK(ttl >= base::TimeDelta()); 21 DCHECK(ttl >= base::TimeDelta());
23 } 22 }
24 23
25 HostCache::Entry::Entry(int error, const AddressList& addrlist) 24 HostCache::Entry::Entry(int error, const AddressList& addrlist)
26 : error(error), 25 : error(error), addrlist(addrlist), ttl(base::TimeDelta::FromSeconds(-1)) {
27 addrlist(addrlist),
28 ttl(base::TimeDelta::FromSeconds(-1)) {
29 } 26 }
30 27
31 HostCache::Entry::~Entry() { 28 HostCache::Entry::~Entry() {
32 } 29 }
33 30
34 //----------------------------------------------------------------------------- 31 //-----------------------------------------------------------------------------
35 32
36 HostCache::HostCache(size_t max_entries) 33 HostCache::HostCache(size_t max_entries) : entries_(max_entries) {
37 : entries_(max_entries) {
38 } 34 }
39 35
40 HostCache::~HostCache() { 36 HostCache::~HostCache() {
41 } 37 }
42 38
43 const HostCache::Entry* HostCache::Lookup(const Key& key, 39 const HostCache::Entry* HostCache::Lookup(const Key& key, base::TimeTicks now) {
44 base::TimeTicks now) {
45 DCHECK(CalledOnValidThread()); 40 DCHECK(CalledOnValidThread());
46 if (caching_is_disabled()) 41 if (caching_is_disabled())
47 return NULL; 42 return NULL;
48 43
49 return entries_.Get(key, now); 44 return entries_.Get(key, now);
50 } 45 }
51 46
52 void HostCache::Set(const Key& key, 47 void HostCache::Set(const Key& key,
53 const Entry& entry, 48 const Entry& entry,
54 base::TimeTicks now, 49 base::TimeTicks now,
(...skipping 21 matching lines...) Expand all
76 } 71 }
77 72
78 // Note that this map may contain expired entries. 73 // Note that this map may contain expired entries.
79 const HostCache::EntryMap& HostCache::entries() const { 74 const HostCache::EntryMap& HostCache::entries() const {
80 DCHECK(CalledOnValidThread()); 75 DCHECK(CalledOnValidThread());
81 return entries_; 76 return entries_;
82 } 77 }
83 78
84 // static 79 // static
85 scoped_ptr<HostCache> HostCache::CreateDefaultCache() { 80 scoped_ptr<HostCache> HostCache::CreateDefaultCache() {
86 // Cache capacity is determined by the field trial. 81 // Cache capacity is determined by the field trial.
87 #if defined(ENABLE_BUILT_IN_DNS) 82 #if defined(ENABLE_BUILT_IN_DNS)
88 const size_t kDefaultMaxEntries = 1000; 83 const size_t kDefaultMaxEntries = 1000;
89 #else 84 #else
90 const size_t kDefaultMaxEntries = 100; 85 const size_t kDefaultMaxEntries = 100;
91 #endif 86 #endif
92 const size_t kSaneMaxEntries = 1 << 20; 87 const size_t kSaneMaxEntries = 1 << 20;
93 size_t max_entries = 0; 88 size_t max_entries = 0;
94 base::StringToSizeT(base::FieldTrialList::FindFullName("HostCacheSize"), 89 base::StringToSizeT(base::FieldTrialList::FindFullName("HostCacheSize"),
95 &max_entries); 90 &max_entries);
96 if ((max_entries == 0) || (max_entries > kSaneMaxEntries)) 91 if ((max_entries == 0) || (max_entries > kSaneMaxEntries))
97 max_entries = kDefaultMaxEntries; 92 max_entries = kDefaultMaxEntries;
98 return make_scoped_ptr(new HostCache(max_entries)); 93 return make_scoped_ptr(new HostCache(max_entries));
99 } 94 }
100 95
101 void HostCache::EvictionHandler::Handle( 96 void HostCache::EvictionHandler::Handle(const Key& key,
102 const Key& key, 97 const Entry& entry,
103 const Entry& entry, 98 const base::TimeTicks& expiration,
104 const base::TimeTicks& expiration, 99 const base::TimeTicks& now,
105 const base::TimeTicks& now, 100 bool on_get) const {
106 bool on_get) const {
107 if (on_get) { 101 if (on_get) {
108 DCHECK(now >= expiration); 102 DCHECK(now >= expiration);
109 UMA_HISTOGRAM_CUSTOM_TIMES("DNS.CacheExpiredOnGet", now - expiration, 103 UMA_HISTOGRAM_CUSTOM_TIMES("DNS.CacheExpiredOnGet",
110 base::TimeDelta::FromSeconds(1), base::TimeDelta::FromDays(1), 100); 104 now - expiration,
105 base::TimeDelta::FromSeconds(1),
106 base::TimeDelta::FromDays(1),
107 100);
111 return; 108 return;
112 } 109 }
113 if (expiration > now) { 110 if (expiration > now) {
114 UMA_HISTOGRAM_CUSTOM_TIMES("DNS.CacheEvicted", expiration - now, 111 UMA_HISTOGRAM_CUSTOM_TIMES("DNS.CacheEvicted",
115 base::TimeDelta::FromSeconds(1), base::TimeDelta::FromDays(1), 100); 112 expiration - now,
113 base::TimeDelta::FromSeconds(1),
114 base::TimeDelta::FromDays(1),
115 100);
116 } else { 116 } else {
117 UMA_HISTOGRAM_CUSTOM_TIMES("DNS.CacheExpired", now - expiration, 117 UMA_HISTOGRAM_CUSTOM_TIMES("DNS.CacheExpired",
118 base::TimeDelta::FromSeconds(1), base::TimeDelta::FromDays(1), 100); 118 now - expiration,
119 base::TimeDelta::FromSeconds(1),
120 base::TimeDelta::FromDays(1),
121 100);
119 } 122 }
120 } 123 }
121 124
122 } // namespace net 125 } // namespace net
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