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LibIPC: Add IPC::MultiServer convenience class

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This encapsulates what our multi-client IPC servers typically do on
startup:

    1. Create a Core::LocalServer
    2. Take over a listening socket file descriptor from SystemServer
    3. Set up an accept handler for incoming connections

IPC::MultiServer does all this for you! All you have to do is provide
the relevant client connection type as a template argument.
This commit is contained in:
Andreas Kling 2021-12-06 17:54:11 +01:00
parent 81047d8f9c
commit 6d0f504822
11 changed files with 62 additions and 81 deletions
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39
Userland/Libraries/LibIPC/MultiServer.h Normal file
View file

@ -0,0 +1,39 @@
/*
* Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Error.h>
#include <LibCore/LocalServer.h>
#include <LibIPC/ClientConnection.h>
namespace IPC {
template<typename ClientConnectionType>
class MultiServer {
public:
static ErrorOr<NonnullOwnPtr<MultiServer>> try_create(Optional<String> socket_path = {})
{
auto server = TRY(Core::LocalServer::try_create());
TRY(server->take_over_from_system_server(socket_path.value_or({})));
return adopt_nonnull_own_or_enomem(new (nothrow) MultiServer(move(server)));
}
private:
explicit MultiServer(NonnullRefPtr<Core::LocalServer> server)
: m_server(move(server))
{
m_server->on_accept = [&](auto client_socket) {
auto client_id = ++m_next_client_id;
(void)IPC::new_client_connection<ClientConnectionType>(move(client_socket), client_id);
};
}
int m_next_client_id { 0 };
RefPtr<Core::LocalServer> m_server;
};
}