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//===-- ListenerTest.cpp --------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "gtest/gtest.h"
#include "lldb/Utility/Broadcaster.h"
#include "lldb/Utility/Event.h"
#include "lldb/Utility/Listener.h"
#include <future>
#include <thread>
using namespace lldb;
using namespace lldb_private;
TEST(ListenerTest, GetEventImmediate) {
EventSP event_sp;
Broadcaster broadcaster(nullptr, "test-broadcaster");
// Create a listener, sign it up, make sure it receives an event.
ListenerSP listener_sp = Listener::MakeListener("test-listener");
const uint32_t event_mask = 1;
ASSERT_EQ(event_mask,
listener_sp->StartListeningForEvents(&broadcaster, event_mask));
const std::chrono::seconds timeout(0);
// Without any events sent, these should return false.
EXPECT_FALSE(listener_sp->GetEvent(event_sp, timeout));
EXPECT_FALSE(listener_sp->GetEventForBroadcaster(nullptr, event_sp, timeout));
EXPECT_FALSE(
listener_sp->GetEventForBroadcaster(&broadcaster, event_sp, timeout));
EXPECT_FALSE(listener_sp->GetEventForBroadcasterWithType(
&broadcaster, event_mask, event_sp, timeout));
// Now send events and make sure they get it.
broadcaster.BroadcastEvent(event_mask, nullptr);
EXPECT_TRUE(listener_sp->GetEvent(event_sp, timeout));
broadcaster.BroadcastEvent(event_mask, nullptr);
EXPECT_TRUE(listener_sp->GetEventForBroadcaster(nullptr, event_sp, timeout));
broadcaster.BroadcastEvent(event_mask, nullptr);
EXPECT_TRUE(
listener_sp->GetEventForBroadcaster(&broadcaster, event_sp, timeout));
broadcaster.BroadcastEvent(event_mask, nullptr);
EXPECT_FALSE(listener_sp->GetEventForBroadcasterWithType(
&broadcaster, event_mask * 2, event_sp, timeout));
EXPECT_TRUE(listener_sp->GetEventForBroadcasterWithType(
&broadcaster, event_mask, event_sp, timeout));
}
TEST(ListenerTest, GetEventWait) {
EventSP event_sp;
Broadcaster broadcaster(nullptr, "test-broadcaster");
// Create a listener, sign it up, make sure it receives an event.
ListenerSP listener_sp = Listener::MakeListener("test-listener");
const uint32_t event_mask = 1;
ASSERT_EQ(event_mask,
listener_sp->StartListeningForEvents(&broadcaster, event_mask));
// Without any events sent, these should make a short wait and return false.
std::chrono::microseconds timeout(10);
EXPECT_FALSE(listener_sp->GetEvent(event_sp, timeout));
EXPECT_FALSE(listener_sp->GetEventForBroadcaster(nullptr, event_sp, timeout));
EXPECT_FALSE(
listener_sp->GetEventForBroadcaster(&broadcaster, event_sp, timeout));
EXPECT_FALSE(listener_sp->GetEventForBroadcasterWithType(
&broadcaster, event_mask, event_sp, timeout));
// Now send events and make sure they get it.
broadcaster.BroadcastEvent(event_mask, nullptr);
EXPECT_TRUE(listener_sp->GetEvent(event_sp, timeout));
broadcaster.BroadcastEvent(event_mask, nullptr);
EXPECT_TRUE(listener_sp->GetEventForBroadcaster(nullptr, event_sp, timeout));
broadcaster.BroadcastEvent(event_mask, nullptr);
EXPECT_TRUE(
listener_sp->GetEventForBroadcaster(&broadcaster, event_sp, timeout));
broadcaster.BroadcastEvent(event_mask, nullptr);
EXPECT_FALSE(listener_sp->GetEventForBroadcasterWithType(
&broadcaster, event_mask * 2, event_sp, timeout));
EXPECT_TRUE(listener_sp->GetEventForBroadcasterWithType(
&broadcaster, event_mask, event_sp, timeout));
auto delayed_broadcast = [&] {
std::this_thread::sleep_for(std::chrono::milliseconds(10));
broadcaster.BroadcastEvent(event_mask, nullptr);
};
// These should do an infinite wait at return the event our asynchronous
// broadcast sends.
std::future<void> async_broadcast =
std::async(std::launch::async, delayed_broadcast);
EXPECT_TRUE(listener_sp->GetEvent(event_sp, std::nullopt));
async_broadcast.get();
async_broadcast = std::async(std::launch::async, delayed_broadcast);
EXPECT_TRUE(listener_sp->GetEventForBroadcaster(&broadcaster, event_sp,
std::nullopt));
async_broadcast.get();
async_broadcast = std::async(std::launch::async, delayed_broadcast);
EXPECT_TRUE(listener_sp->GetEventForBroadcasterWithType(
&broadcaster, event_mask, event_sp, std::nullopt));
async_broadcast.get();
}
TEST(ListenerTest, StartStopListeningForEventSpec) {
constexpr uint32_t event_mask = 1;
static constexpr llvm::StringLiteral broadcaster_class = "broadcaster-class";
class TestBroadcaster : public Broadcaster {
using Broadcaster::Broadcaster;
llvm::StringRef GetBroadcasterClass() const override {
return broadcaster_class;
}
};
BroadcasterManagerSP manager_sp =
BroadcasterManager::MakeBroadcasterManager();
ListenerSP listener_sp = Listener::MakeListener("test-listener");
// Create two broadcasters, one while we're waiting for new broadcasters, and
// one when we're not.
ASSERT_EQ(listener_sp->StartListeningForEventSpec(
manager_sp, BroadcastEventSpec(broadcaster_class, event_mask)),
event_mask);
TestBroadcaster broadcaster1(manager_sp, "test-broadcaster-1");
broadcaster1.CheckInWithManager();
ASSERT_TRUE(listener_sp->StopListeningForEventSpec(
manager_sp, BroadcastEventSpec(broadcaster_class, event_mask)));
TestBroadcaster broadcaster2(manager_sp, "test-broadcaster-2");
broadcaster2.CheckInWithManager();
// Use both broadcasters to send an event.
for (auto *b : {&broadcaster1, &broadcaster2})
b->BroadcastEvent(event_mask, nullptr);
// Use should only get the event from the first one.
EventSP event_sp;
ASSERT_TRUE(listener_sp->GetEvent(event_sp, std::chrono::seconds(0)));
ASSERT_EQ(event_sp->GetBroadcaster(), &broadcaster1);
ASSERT_FALSE(listener_sp->GetEvent(event_sp, std::chrono::seconds(0)));
}
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