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46 lines
1.2 KiB
46 lines
1.2 KiB
// Copyright 2019 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef OSP_PUBLIC_ENDPOINT_REQUEST_IDS_H_
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#define OSP_PUBLIC_ENDPOINT_REQUEST_IDS_H_
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#include <cstdint>
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#include <map>
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#include "platform/base/macros.h"
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namespace openscreen {
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namespace osp {
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// Tracks the next available message request ID per endpoint by its endpoint ID.
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// These can only be incremented while an endpoint is connected but can be reset
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// on disconnection. This is necessary because all APIs that use CBOR messages
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// across a QUIC stream share the |request_id| field, which must be unique
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// within a pair of endpoints.
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class EndpointRequestIds {
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public:
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enum class Role {
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kClient,
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kServer,
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};
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explicit EndpointRequestIds(Role role);
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~EndpointRequestIds();
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uint64_t GetNextRequestId(uint64_t endpoint_id);
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void ResetRequestId(uint64_t endpoint_id);
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void Reset();
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private:
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const Role role_;
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std::map<uint64_t, uint64_t> request_ids_by_endpoint_id_;
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OSP_DISALLOW_COPY_AND_ASSIGN(EndpointRequestIds);
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};
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} // namespace osp
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} // namespace openscreen
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#endif // OSP_PUBLIC_ENDPOINT_REQUEST_IDS_H_
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