chromium/content/public/browser/global_routing_id.h

// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CONTENT_PUBLIC_BROWSER_GLOBAL_ROUTING_ID_H_
#define CONTENT_PUBLIC_BROWSER_GLOBAL_ROUTING_ID_H_

#include <compare>
#include <ostream>

#include "base/hash/hash.h"
#include "base/i18n/number_formatting.h"
#include "content/common/content_export.h"
#include "content/public/common/content_constants.h"
#include "ipc/ipc_message.h"
#include "third_party/blink/public/common/tokens/tokens.h"
#include "third_party/perfetto/include/perfetto/tracing/traced_value_forward.h"

namespace perfetto::protos::pbzero {
class GlobalRenderFrameHostId;
}  // namespace perfetto::protos::pbzero

namespace content {

// Uniquely identifies a target that legacy IPCs can be routed to.
//
// These IDs can be considered to be unique for the lifetime of the browser
// process. While they are finite and thus must eventually roll over, this case
// may be considered sufficiently rare as to be ignorable.
struct CONTENT_EXPORT GlobalRoutingID { … };

inline std::ostream& operator<<(std::ostream& os, const GlobalRoutingID& id) { … }

// Same as GlobalRoutingID except the route_id must be a RenderFrameHost routing
// id.
//
// These IDs can be considered to be unique for the lifetime of the browser
// process. While they are finite and thus must eventually roll over, this case
// may be considered sufficiently rare as to be ignorable.
struct CONTENT_EXPORT GlobalRenderFrameHostId { … };

// Similar to GlobalRenderFrameHostId except that it uses FrameTokens instead
// of routing ids.
//
// These tokens can be considered to be unique for the lifetime of the browser
// process.
struct GlobalRenderFrameHostToken { … };

inline std::ostream& operator<<(std::ostream& os,
                                const GlobalRenderFrameHostId& id) { … }

struct GlobalRenderFrameHostIdHasher { … };

}  // namespace content

#endif  // CONTENT_PUBLIC_BROWSER_GLOBAL_ROUTING_ID_H_