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// Copyright 2014 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 SYNC_INTERNAL_API_PROTOCOL_EVENT_BUFFER_H_
#define SYNC_INTERNAL_API_PROTOCOL_EVENT_BUFFER_H_
#include <stddef.h>
#include <deque>
#include "base/macros.h"
#include "base/memory/scoped_vector.h"
#include "sync/base/sync_export.h"
namespace syncer {
class ProtocolEvent;
// A container for ProtocolEvents.
//
// Stores at most kBufferSize events, then starts dropping the oldest events.
class SYNC_EXPORT ProtocolEventBuffer {
public:
static const size_t kBufferSize;
ProtocolEventBuffer();
~ProtocolEventBuffer();
// Records an event. May cause the oldest event to be dropped.
void RecordProtocolEvent(const ProtocolEvent& event);
// Returns the buffered contents. Will not clear the buffer.
ScopedVector<ProtocolEvent> GetBufferedProtocolEvents() const;
private:
std::deque<ProtocolEvent*> buffer_;
STLElementDeleter<std::deque<ProtocolEvent*> > buffer_deleter_;
DISALLOW_COPY_AND_ASSIGN(ProtocolEventBuffer);
};
} // namespace syncer
#endif // SYNC_INTERNAL_API_PROTOCOL_EVENT_BUFFER_H_
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