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// Copyright 2019 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 OSP_PUBLIC_ENDPOINT_REQUEST_IDS_H_
#define OSP_PUBLIC_ENDPOINT_REQUEST_IDS_H_
#include <cstdint>
#include <map>
#include "osp_base/macros.h"
namespace openscreen {
// Tracks the next available message request ID per endpoint by its endpoint ID.
// These can only be incremented while an endpoint is connected but can be reset
// on disconnection. This is necessary because all APIs that use CBOR messages
// across a QUIC stream share the |request_id| field, which must be unique
// within a pair of endpoints.
class EndpointRequestIds {
public:
enum class Role {
kClient,
kServer,
};
explicit EndpointRequestIds(Role role);
~EndpointRequestIds();
uint64_t GetNextRequestId(uint64_t endpoint_id);
void ResetRequestId(uint64_t endpoint_id);
void Reset();
private:
const Role role_;
std::map<uint64_t, uint64_t> request_ids_by_endpoint_id_;
OSP_DISALLOW_COPY_AND_ASSIGN(EndpointRequestIds);
};
} // namespace openscreen
#endif // OSP_PUBLIC_ENDPOINT_REQUEST_IDS_H_
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