ServiceWorker: Introduce SWMessageSender in order to mock IPC messaging
[chromium-blink-merge.git] / cc / resources / memory_history.h
blob570a3d0ca4321f8ec13f2fe27d8ea063b153806f
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.
5 #ifndef CC_RESOURCES_MEMORY_HISTORY_H_
6 #define CC_RESOURCES_MEMORY_HISTORY_H_
8 #include "base/basictypes.h"
9 #include "base/memory/scoped_ptr.h"
10 #include "base/time/time.h"
11 #include "cc/debug/ring_buffer.h"
13 namespace cc {
15 // Maintains a history of memory for each frame.
16 class MemoryHistory {
17 public:
18 static scoped_ptr<MemoryHistory> Create();
20 size_t HistorySize() const { return ring_buffer_.BufferSize(); }
22 struct Entry {
23 Entry()
24 : total_budget_in_bytes(0),
25 total_bytes_used(0),
26 had_enough_memory(false) {}
28 size_t total_budget_in_bytes;
29 size_t total_bytes_used;
30 bool had_enough_memory;
33 void SaveEntry(const Entry& entry);
34 void GetMinAndMax(size_t* min, size_t* max) const;
36 typedef RingBuffer<Entry, 80> RingBufferType;
37 RingBufferType::Iterator Begin() const { return ring_buffer_.Begin(); }
38 RingBufferType::Iterator End() const { return ring_buffer_.End(); }
40 private:
41 MemoryHistory();
43 RingBufferType ring_buffer_;
45 DISALLOW_COPY_AND_ASSIGN(MemoryHistory);
48 } // namespace cc
50 #endif // CC_RESOURCES_MEMORY_HISTORY_H_