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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (C) 2019, Google Inc.
*
* signal-threads.cpp - Cross-thread signal delivery test
*/
#include <chrono>
#include <iostream>
#include <thread>
#include <libcamera/base/message.h>
#include <libcamera/base/object.h>
#include <libcamera/base/thread.h>
#include <libcamera/base/utils.h>
#include "test.h"
using namespace std;
using namespace libcamera;
class SignalReceiver : public Object
{
public:
enum Status {
NoSignal,
InvalidThread,
SignalReceived,
};
SignalReceiver()
: status_(NoSignal)
{
}
Status status() const { return status_; }
int value() const { return value_; }
void reset()
{
status_ = NoSignal;
value_ = 0;
}
void slot(int value)
{
if (Thread::current() != thread())
status_ = InvalidThread;
else
status_ = SignalReceived;
value_ = value;
}
private:
Status status_;
int value_;
};
class SignalThreadsTest : public Test
{
protected:
int run()
{
SignalReceiver receiver;
signal_.connect(&receiver, &SignalReceiver::slot);
/* Test that a signal is received in the main thread. */
signal_.emit(0);
switch (receiver.status()) {
case SignalReceiver::NoSignal:
cout << "No signal received for direct connection" << endl;
return TestFail;
case SignalReceiver::InvalidThread:
cout << "Signal received in incorrect thread "
"for direct connection" << endl;
return TestFail;
default:
break;
}
/*
* Move the object to a thread and verify that the signal is
* correctly delivered, with the correct data.
*/
receiver.reset();
receiver.moveToThread(&thread_);
thread_.start();
signal_.emit(42);
this_thread::sleep_for(chrono::milliseconds(100));
switch (receiver.status()) {
case SignalReceiver::NoSignal:
cout << "No signal received for message connection" << endl;
return TestFail;
case SignalReceiver::InvalidThread:
cout << "Signal received in incorrect thread "
"for message connection" << endl;
return TestFail;
default:
break;
}
if (receiver.value() != 42) {
cout << "Signal received with incorrect value" << endl;
return TestFail;
}
return TestPass;
}
void cleanup()
{
thread_.exit(0);
thread_.wait();
}
private:
Thread thread_;
Signal<int> signal_;
};
TEST_REGISTER(SignalThreadsTest)
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