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LibIPC: Don't handle incoming messages right away when draining

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When draining the socket in IServerConnection, we would previously
handle each incoming (local endpoint) message as it came in.

This would cause unexpected things to happen while blocked waiting
for a synchronous response. That's definitely not what we want,
so this patch puts all of the incoming messages in a queue and does
a separate pass over the queue to handle everything in order.
This commit is contained in:
Andreas Kling 2019-12-02 10:49:47 +01:00
parent 4a37bec27c
commit 86504f4461
1 changed files with 12 additions and 1 deletions
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13
Libraries/LibIPC/IServerConnection.h
View file

@ -1,5 +1,6 @@
#pragma once
#include <AK/NonnullOwnPtrVector.h>
#include <LibCore/CEvent.h>
#include <LibCore/CEventLoop.h>
#include <LibCore/CLocalSocket.h>
@ -25,6 +26,7 @@ public:
m_connection->set_blocking(true);
m_notifier->on_ready_to_read = [this] {
drain_messages_from_server();
handle_messages();
};
int retries = 100000;
@ -131,7 +133,7 @@ private:
for (size_t index = 0; index < (size_t)bytes.size(); index += decoded_bytes) {
auto remaining_bytes = ByteBuffer::wrap(bytes.data() + index, bytes.size() - index);
if (auto message = LocalEndpoint::decode_message(remaining_bytes, decoded_bytes)) {
m_local_endpoint.handle(*message);
m_unprocessed_messages.append(move(message));
} else if (auto message = PeerEndpoint::decode_message(remaining_bytes, decoded_bytes)) {
m_unprocessed_messages.append(move(message));
} else {
@ -142,6 +144,15 @@ private:
return true;
}
void handle_messages()
{
auto messages = move(m_unprocessed_messages);
for (auto& message : messages) {
if (message->endpoint_magic() == LocalEndpoint::static_magic())
m_local_endpoint.handle(*message);
}
}
LocalEndpoint& m_local_endpoint;
RefPtr<CLocalSocket> m_connection;
RefPtr<CNotifier> m_notifier;