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 #ifndef CC_RESOURCES_MEMORY_HISTORY_H_ 6 #define CC_RESOURCES_MEMORY_HISTORY_H_ 7 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" 12 13 namespace cc { 14 15 // Maintains a history of memory for each frame. 16 class MemoryHistory { 17 public: 18 static scoped_ptr<MemoryHistory> Create(); 19 20 size_t HistorySize() const { return ring_buffer_.BufferSize(); } 21 22 struct Entry { 23 Entry() 24 : total_budget_in_bytes(0), 25 bytes_allocated(0), 26 bytes_unreleasable(0), 27 bytes_over(0) {} 28 29 size_t total_budget_in_bytes; 30 size_t bytes_allocated; 31 size_t bytes_unreleasable; 32 size_t bytes_over; 33 size_t bytes_total() const { 34 return bytes_allocated + bytes_unreleasable + bytes_over; 35 } 36 }; 37 38 void SaveEntry(const Entry& entry); 39 void GetMinAndMax(size_t* min, size_t* max) const; 40 41 typedef RingBuffer<Entry, 80> RingBufferType; 42 RingBufferType::Iterator Begin() const { return ring_buffer_.Begin(); } 43 RingBufferType::Iterator End() const { return ring_buffer_.End(); } 44 45 private: 46 MemoryHistory(); 47 48 RingBufferType ring_buffer_; 49 50 DISALLOW_COPY_AND_ASSIGN(MemoryHistory); 51 }; 52 53 } // namespace cc 54 55 #endif // CC_RESOURCES_MEMORY_HISTORY_H_ 56
