1 // Copyright 2013 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "chrome/browser/net/timed_cache.h" 6 7 #include "url/gurl.h" 8 9 namespace chrome_browser_net { 10 11 TimedCache::TimedCache(const base::TimeDelta& max_duration) 12 : mru_cache_(UrlMruTimedCache::NO_AUTO_EVICT), 13 max_duration_(max_duration) { 14 } 15 16 // Make Clang compilation happy with explicit destructor. 17 TimedCache::~TimedCache() {} 18 19 bool TimedCache::WasRecentlySeen(const GURL& url) { 20 DCHECK_EQ(url.GetWithEmptyPath(), url); 21 // Evict any overly old entries. 22 base::TimeTicks now = base::TimeTicks::Now(); 23 UrlMruTimedCache::reverse_iterator eldest = mru_cache_.rbegin(); 24 while (!mru_cache_.empty()) { 25 DCHECK(eldest == mru_cache_.rbegin()); 26 if (now - eldest->second < max_duration_) 27 break; 28 eldest = mru_cache_.Erase(eldest); 29 } 30 return mru_cache_.end() != mru_cache_.Peek(url); 31 } 32 33 void TimedCache::SetRecentlySeen(const GURL& url) { 34 DCHECK_EQ(url.GetWithEmptyPath(), url); 35 mru_cache_.Put(url, base::TimeTicks::Now()); 36 } 37 38 } // namespace chrome_browser_net 39
