chrome/browser/net/timed_cache.cc

   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