cc/paint/transfer_cache_serialize_helper.h

// Copyright 2017 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_PAINT_TRANSFER_CACHE_SERIALIZE_HELPER_H_
#define CC_PAINT_TRANSFER_CACHE_SERIALIZE_HELPER_H_

#include <set>
#include <vector>

#include "cc/paint/paint_export.h"
#include "cc/paint/transfer_cache_entry.h"

namespace cc {

class CC_PAINT_EXPORT TransferCacheSerializeHelper {
 public:
  TransferCacheSerializeHelper();
  virtual ~TransferCacheSerializeHelper();

  bool LockEntry(TransferCacheEntryType type, uint32_t id);
  // The PaintOpWriter passes the address where the transfer cache may inline
  // this entry. The size returned is the memory used if the entry is inlined,
  // or 0u if no data is inlined.
  uint32_t CreateEntry(const ClientTransferCacheEntry& entry, char* memory);
  void FlushEntries();

  void AssertLocked(TransferCacheEntryType type, uint32_t id);

 protected:
  using EntryKey = std::pair<TransferCacheEntryType, uint32_t>;

  virtual bool LockEntryInternal(const EntryKey& key) = 0;
  virtual uint32_t CreateEntryInternal(const ClientTransferCacheEntry& entry,
                                       char* memory) = 0;
  virtual void FlushEntriesInternal(std::set<EntryKey> keys) = 0;

 private:
  std::set<EntryKey> added_entries_;
};

}  // namespace cc

#endif  // CC_PAINT_TRANSFER_CACHE_SERIALIZE_HELPER_H_