cc/resources/memory_history.cc

   1 // Copyright 2012 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 "cc/resources/memory_history.h"
   6
   7 #include <limits>
   8
   9 namespace cc {
  10
  11 // static
  12 scoped_ptr<MemoryHistory> MemoryHistory::Create() {
  13   return make_scoped_ptr(new MemoryHistory());
  14 }
  15
  16 MemoryHistory::MemoryHistory() {}
  17
  18 void MemoryHistory::SaveEntry(const MemoryHistory::Entry& entry) {
  19   ring_buffer_.SaveToBuffer(entry);
  20 }
  21
  22 void MemoryHistory::GetMinAndMax(size_t* min, size_t* max) const {
  23   *min = std::numeric_limits<size_t>::max();
  24   *max = 0;
  25
  26   for (RingBufferType::Iterator it = ring_buffer_.Begin(); it; ++it) {
  27     size_t bytes_total = it->total_bytes_used;
  28
  29     if (bytes_total < *min)
  30       *min = bytes_total;
  31     if (bytes_total > *max)
  32       *max = bytes_total;
  33   }
  34
  35   if (*min > *max)
  36     *min = *max;
  37 }
  38
  39 }  // namespace cc