chromium/mojo/public/cpp/bindings/connection_group.h

// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef MOJO_PUBLIC_CPP_BINDINGS_CONNECTION_GROUP_H_
#define MOJO_PUBLIC_CPP_BINDINGS_CONNECTION_GROUP_H_

#include <atomic>

#include "base/component_export.h"
#include "base/functional/callback.h"
#include "base/memory/ref_counted.h"
#include "base/task/sequenced_task_runner.h"

namespace mojo {

// A ConnectionGroup is used to loosely track groups of related interface
// receivers. Any Receiver or PendingReceiver can reference a single
// ConnectionGroup by holding onto a corresponding Ref.
//
// Belonging to a connection group is a viral property: if a Receiver belongs to
// a connection group, any PendingReceivers arriving in inbound messages
// automatically inherit a Ref to the same group. Likewise if a PendingReceiver
// belongs to a group, any Receiver which consumes and binds that
// PendingReceiver inherits its group membership.
class COMPONENT_EXPORT(MOJO_CPP_BINDINGS_BASE) ConnectionGroup
    : public base::RefCountedThreadSafe<ConnectionGroup> { … };

}  // namespace mojo

#endif  // MOJO_PUBLIC_CPP_BINDINGS_CONNECTION_GROUP_H_