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// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CC_MEMORY_HISTORY_H_
#define CC_MEMORY_HISTORY_H_
#include "base/basictypes.h"
#include "base/memory/scoped_ptr.h"
#include "base/time.h"
#include "cc/ring_buffer.h"
namespace cc {
// Maintains a history of memory for each frame
class MemoryHistory {
public:
static scoped_ptr<MemoryHistory> create();
size_t HistorySize() const { return ring_buffer_.BufferSize(); }
struct Entry {
Entry()
: total_budget_in_bytes(0),
bytes_allocated(0),
bytes_unreleasable(0),
bytes_over(0) { }
size_t total_budget_in_bytes;
size_t bytes_allocated;
size_t bytes_unreleasable;
size_t bytes_over;
size_t bytes_total() const {
return bytes_allocated +
bytes_unreleasable +
bytes_over;
}
};
// n = 0 returns the oldest and
// n = HistorySize() - 1 the most recent paint time.
Entry GetEntry(const size_t& n) const;
void SaveEntry(const Entry& entry);
void GetMinAndMax(size_t* min, size_t* max) const;
private:
MemoryHistory();
RingBuffer<Entry, 80> ring_buffer_;
DISALLOW_COPY_AND_ASSIGN(MemoryHistory);
};
} // namespace cc
#endif // CC_MEMORY_HISTORY_H_
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