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IPCCompiler+LibIPC: Generate message decoders with better TRY semantics

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Instead of a bunch of manual error checking and returning a null OwnPtr,
we can propagate the errors up and return NonnullOwnPtr on success.
This commit is contained in:
Timothy Flynn 2022-12-22 13:48:44 -05:00 • committed by Andreas Kling
parent dc77ec733f
commit 765c5b416f
2 changed files with 52 additions and 50 deletions
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23
Userland/Libraries/LibIPC/Connection.h
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@ -139,14 +139,23 @@ protected:
break;
index += sizeof(message_size);
auto remaining_bytes = ReadonlyBytes { bytes.data() + index, message_size };
if (auto message = LocalEndpoint::decode_message(remaining_bytes, fd_passing_socket())) {
m_unprocessed_messages.append(message.release_nonnull());
} else if (auto message = PeerEndpoint::decode_message(remaining_bytes, fd_passing_socket())) {
m_unprocessed_messages.append(message.release_nonnull());
} else {
dbgln("Failed to parse a message");
break;
auto local_message = LocalEndpoint::decode_message(remaining_bytes, fd_passing_socket());
if (!local_message.is_error()) {
m_unprocessed_messages.append(local_message.release_value());
continue;
}
auto peer_message = PeerEndpoint::decode_message(remaining_bytes, fd_passing_socket());
if (!peer_message.is_error()) {
m_unprocessed_messages.append(peer_message.release_value());
continue;
}
dbgln("Failed to parse a message");
dbgln("Local endpoint error: {}", local_message.error());
dbgln("Peer endpoint error: {}", peer_message.error());
break;
}
}
};