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// Copyright 2021 The Dawn Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// AsyncTaskTests:
// Simple tests for dawn_native::AsyncTask and dawn_native::AsnycTaskManager.
#include <gtest/gtest.h>
#include <memory>
#include <mutex>
#include "common/NonCopyable.h"
#include "dawn_native/AsyncTask.h"
#include "dawn_platform/DawnPlatform.h"
namespace {
struct SimpleTaskResult {
uint32_t id;
};
// A thread-safe queue that stores the task results.
class ConcurrentTaskResultQueue : public NonCopyable {
public:
void AddResult(std::unique_ptr<SimpleTaskResult> result) {
std::lock_guard<std::mutex> lock(mMutex);
mTaskResults.push_back(std::move(result));
}
std::vector<std::unique_ptr<SimpleTaskResult>> GetAllResults() {
std::vector<std::unique_ptr<SimpleTaskResult>> outputResults;
{
std::lock_guard<std::mutex> lock(mMutex);
outputResults.swap(mTaskResults);
}
return outputResults;
}
private:
std::mutex mMutex;
std::vector<std::unique_ptr<SimpleTaskResult>> mTaskResults;
};
void DoTask(ConcurrentTaskResultQueue* resultQueue, uint32_t id) {
std::unique_ptr<SimpleTaskResult> result = std::make_unique<SimpleTaskResult>();
result->id = id;
resultQueue->AddResult(std::move(result));
}
} // anonymous namespace
class AsyncTaskTest : public testing::Test {};
// Emulate the basic usage of worker thread pool in Create*PipelineAsync().
TEST_F(AsyncTaskTest, Basic) {
dawn_platform::Platform platform;
std::unique_ptr<dawn_platform::WorkerTaskPool> pool = platform.CreateWorkerTaskPool();
dawn_native::AsnycTaskManager taskManager(pool.get());
ConcurrentTaskResultQueue taskResultQueue;
constexpr size_t kTaskCount = 4u;
std::set<uint32_t> idset;
for (uint32_t i = 0; i < kTaskCount; ++i) {
dawn_native::AsyncTask asyncTask([&taskResultQueue, i] { DoTask(&taskResultQueue, i); });
taskManager.PostTask(std::move(asyncTask));
idset.insert(i);
}
taskManager.WaitAllPendingTasks();
std::vector<std::unique_ptr<SimpleTaskResult>> results = taskResultQueue.GetAllResults();
ASSERT_EQ(kTaskCount, results.size());
for (std::unique_ptr<SimpleTaskResult>& result : results) {
idset.erase(result->id);
}
ASSERT_TRUE(idset.empty());
}