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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (C) 2019, Google Inc.
*
* message.cpp - Messages test
*/
#include <chrono>
#include <iostream>
#include <memory>
#include <thread>
#include <libcamera/base/message.h>
#include <libcamera/base/thread.h>
#include "test.h"
using namespace std;
using namespace libcamera;
class MessageReceiver : public Object
{
public:
enum Status {
NoMessage,
InvalidThread,
MessageReceived,
};
MessageReceiver(Object *parent = nullptr)
: Object(parent), status_(NoMessage)
{
}
Status status() const { return status_; }
void reset() { status_ = NoMessage; }
protected:
void message(Message *msg)
{
if (msg->type() != Message::None) {
Object::message(msg);
return;
}
if (thread() != Thread::current())
status_ = InvalidThread;
else
status_ = MessageReceived;
}
private:
Status status_;
};
class RecursiveMessageReceiver : public Object
{
public:
RecursiveMessageReceiver()
: child_(this), success_(false)
{
}
bool success() const { return success_; }
protected:
void message([[maybe_unused]] Message *msg)
{
if (msg->type() != Message::None) {
Object::message(msg);
return;
}
child_.postMessage(std::make_unique<Message>(Message::None));
/*
* If the child has already received the message, something is
* wrong.
*/
if (child_.status() != MessageReceiver::NoMessage)
return;
Thread::current()->dispatchMessages(Message::None);
/* The child should now have received the message. */
if (child_.status() == MessageReceiver::MessageReceived)
success_ = true;
}
private:
MessageReceiver child_;
bool success_;
};
class SlowMessageReceiver : public Object
{
protected:
void message(Message *msg)
{
if (msg->type() != Message::None) {
Object::message(msg);
return;
}
/*
* Don't access any member of the object here (including the
* vtable) as the object will be deleted by the main thread
* while we're sleeping.
*/
this_thread::sleep_for(chrono::milliseconds(100));
}
};
class MessageTest : public Test
{
protected:
int run()
{
Message::Type msgType[2] = {
Message::registerMessageType(),
Message::registerMessageType(),
};
if (msgType[0] != Message::UserMessage ||
msgType[1] != Message::UserMessage + 1) {
cout << "Failed to register message types" << endl;
return TestFail;
}
MessageReceiver receiver;
receiver.moveToThread(&thread_);
thread_.start();
receiver.postMessage(std::make_unique<Message>(Message::None));
this_thread::sleep_for(chrono::milliseconds(100));
switch (receiver.status()) {
case MessageReceiver::NoMessage:
cout << "No message received" << endl;
return TestFail;
case MessageReceiver::InvalidThread:
cout << "Message received in incorrect thread" << endl;
return TestFail;
default:
break;
}
/*
* Test for races between message delivery and object deletion.
* Failures result in assertion errors, there is no need for
* explicit checks.
*/
SlowMessageReceiver *slowReceiver = new SlowMessageReceiver();
slowReceiver->moveToThread(&thread_);
slowReceiver->postMessage(std::make_unique<Message>(Message::None));
this_thread::sleep_for(chrono::milliseconds(10));
delete slowReceiver;
this_thread::sleep_for(chrono::milliseconds(100));
/*
* Test recursive calls to Thread::dispatchMessages(). Messages
* should be delivered correctly, without crashes or memory
* leaks. Two messages need to be posted to ensure we don't only
* test the simple case of a queue containing a single message.
*/
std::unique_ptr<RecursiveMessageReceiver> recursiveReceiver =
std::make_unique<RecursiveMessageReceiver>();
recursiveReceiver->moveToThread(&thread_);
recursiveReceiver->postMessage(std::make_unique<Message>(Message::None));
recursiveReceiver->postMessage(std::make_unique<Message>(Message::UserMessage));
this_thread::sleep_for(chrono::milliseconds(10));
if (!recursiveReceiver->success()) {
cout << "Recursive message delivery failed" << endl;
return TestFail;
}
return TestPass;
}
void cleanup()
{
thread_.exit(0);
thread_.wait();
}
private:
Thread thread_;
};
TEST_REGISTER(MessageTest)
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