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multiprocess: Add echoipc RPC method and test

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Add simple interfaces::Echo IPC interface with one method that just takes and
returns a string, to test multiprocess framework and provide an example of how
it can be used to spawn and call between processes.
This commit is contained in:
Russell Yanofsky
2020-11-24 13:59:33 -05:00
parent 7d76cf667e
commit 84934bf70e
11 changed files with 121 additions and 0 deletions
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17
src/ipc/capnp/echo.capnp Normal file
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@@ -0,0 +1,17 @@
# Copyright (c) 2021 The Bitcoin Core developers
# Distributed under the MIT software license, see the accompanying
# file COPYING or http://www.opensource.org/licenses/mit-license.php.
@0x888b4f7f51e691f7;
using Cxx = import "/capnp/c++.capnp";
$Cxx.namespace("ipc::capnp::messages");
using Proxy = import "/mp/proxy.capnp";
$Proxy.include("interfaces/echo.h");
$Proxy.include("ipc/capnp/echo.capnp.h");
interface Echo $Proxy.wrap("interfaces::Echo") {
destroy @0 (context :Proxy.Context) -> ();
echo @1 (context :Proxy.Context, echo: Text) -> (result :Text);
}

3
src/ipc/capnp/init-types.h
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@@ -4,4 +4,7 @@
#ifndef BITCOIN_IPC_CAPNP_INIT_TYPES_H
#define BITCOIN_IPC_CAPNP_INIT_TYPES_H
#include <ipc/capnp/echo.capnp.proxy-types.h>
#endif // BITCOIN_IPC_CAPNP_INIT_TYPES_H

4
src/ipc/capnp/init.capnp
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@@ -8,9 +8,13 @@ using Cxx = import "/capnp/c++.capnp";
$Cxx.namespace("ipc::capnp::messages");
using Proxy = import "/mp/proxy.capnp";
$Proxy.include("interfaces/echo.h");
$Proxy.include("interfaces/init.h");
$Proxy.includeTypes("ipc/capnp/init-types.h");
using Echo = import "echo.capnp";
interface Init $Proxy.wrap("interfaces::Init") {
construct @0 (threadMap: Proxy.ThreadMap) -> (threadMap :Proxy.ThreadMap);
makeEcho @1 (context :Proxy.Context) -> (result :Echo.Echo);
}